fix #2752 sheet_to_csv skips first blank line with blankrows: true option

sheet_to_csv skips first blank line with blankrows: true option
2022-08-26 22:10:19 +02:00
86 changed files with 5967 additions and 11413 deletions
--- a/.eslintrc
+++ b/.eslintrc
@ -11,7 +11,6 @@
 		"comma-dangle": [ 2, "never" ],
 		"curly": 0,
 		"no-bitwise": 0,
-		"no-cond-assign": 1,
 		"no-console": 0,
 		"no-control-regex": 0,
 		"no-unused-vars": 1,
--- a/.github/ISSUE_TEMPLATE/config.yml
+++ b/.github/ISSUE_TEMPLATE/config.yml
@ -1,6 +0,0 @@
-blank_issues_enabled: false
-contact_links:
-    - name: Issues and Questions
-      url: https://git.sheetjs.com/sheetjs/sheetjs/issues
-      about: Please report issues to the official code repository.
-
--- a/.gitmodules
+++ b/.gitmodules
@ -1,4 +1,3 @@
 [submodule "test_files"]
 	path = test_files
 	url = https://github.com/SheetJS/test_files
-	ignore = dirty
--- a/.npmignore
+++ b/.npmignore
@ -58,11 +58,11 @@ make.cmd
 xlsworker.js
 shim.js
 test.js
+hotcross.mjs
 test.mjs
 test.ts
 test.mts
 testnocp.ts
-testbun.mjs
 .jscs.json
 .gitmodules
 .travis.yml
--- a/.spelling
+++ b/.spelling
@ -54,7 +54,6 @@ Rollup
 SessionStorage
 SQLite
 SystemJS
-Vite
 VueJS
 WebKit
 WebSQL
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,41 +4,6 @@ This log is intended to keep track of backwards-incompatible changes, including
 but not limited to API changes and file location changes.  Minor behavioral
 changes may not be included if they are not expected to break existing code.

-## v0.19.3
-
-* XLSX Ensure comment address is valid (h/t @slonser)
-* Enforce Excel worksheet name restrictions
-
-## v0.19.2
-
-* XLSX proper decoding of hyperlinks (h/t @tw-yaxu)
-* XLSX ignore unexpected attributes in rich text (h/t @colin4)
-* `sheet_to_json` type fix (h/t @chsdwn)
-
-## v0.19.1
-
-* Fixed types issue in strict mode (h/t @younes-io)
-* Numbers 12.2 parsing skip ActivityStream.iwa
-
-## v0.19.0
-
-* XLSX export hyperlinks compatible with google sheets (h/t Evan Bovie)
-* NUMBERS export multiple sheets, full worksheet range
-* formalized `dense` mode
-
-## v0.18.12
-
-* `package.json` added types in `exports` structure
-* uncapped NUMBERS single-sheet single-table export
-* DBF export records using supported codepages
-
-## v0.18.11
-
-* Base64 input ignore data URI wrapper
-* Parse ZIP files that use ZIP64 extended information field
-* More precise handling of time-only values
-* Threaded Comment fallback text for older Excel
-
 ## v0.18.10

 * `exports` field in package.json to satiate ViteJS and newer tooling
@ -56,7 +21,7 @@ changes may not be included if they are not expected to break existing code.
 ## v0.18.8

 * Plaintext parsing of dateless meridien time values (`1:23:45 PM`)
-* Legacy format (SYLK / WK# / Multiplan) minutiae
+* Legacy format (SYLK / WK# / Multiplan) minutiae 

 ## v0.18.7

--- a/7
+++ b/7
@ -113,7 +113,6 @@ BYTEFILER=dist/xlsx.extendscript.js xlsx.mjs
 bytes: ## Display minified and gzipped file sizes
 	@for i in $(BYTEFILEC); do npx printj "%-30s %7d %10d" $$i $$(wc -c < $$i) $$(gzip --best --stdout $$i | wc -c); done
 	@for i in $(BYTEFILER); do npx printj "%-30s %7d" $$i $$(wc -c < $$i); done
-	@npx printj "%-30s         %10d" "treeshake" "$$(npx esbuild@0.14.14 --bundle misc/import.js | wc -c)"


 .PHONY: git
@ -149,16 +148,16 @@ test.ts: test.mts
 	node -pe 'var data = fs.readFileSync("'$<'", "utf8"); data.split("\n").map(function(l) { return l.replace(/^describe\((.*?)function\(\)/, "Deno.test($$1async function(t)").replace(/\b(?:it|describe)\((.*?)function\(\)/g, "await t.step($$1async function(t)").replace("assert.ok", "assert.assert"); }).join("\n")' > $@

 .PHONY: test-bun
-test-bun: testbun.mjs ## Run Bun test suite
+test-bun: hotcross.mjs ## Run Bun test suite
 	bun $<

 .PHONY: test-deno
 test-deno: test.ts ## Run Deno test suite
-	deno test --check --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<
+	deno test --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<

 .PHONY: test-denocp
 test-denocp: testnocp.ts ## Run Deno test suite (without codepage)
-	deno test --check --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<
+	deno test --allow-env --allow-read --allow-write --config misc/test.deno.jsonc $<

 TESTFMT=$(patsubst %,test_%,$(FMT))
 .PHONY: $(TESTFMT)
--- a/README.md
+++ b/README.md
@ -9,6 +9,12 @@ Edit complex templates with ease; let out your inner Picasso with styling; make
 custom sheets with images/graphs/PivotTables; evaluate formula expressions and
 port calculations to web apps; automate common spreadsheet tasks, and much more!

+[![License](https://img.shields.io/github/license/SheetJS/sheetjs)](https://github.com/SheetJS/sheetjs/blob/master/LICENSE)
+[![Build Status](https://img.shields.io/github/workflow/status/sheetjs/sheetjs/Tests:%20node.js)](https://github.com/SheetJS/sheetjs/actions)
+[![Snyk Vulnerabilities](https://img.shields.io/snyk/vulnerabilities/github/SheetJS/sheetjs)](https://snyk.io/test/github/SheetJS/sheetjs)
+[![npm Downloads](https://img.shields.io/npm/dm/xlsx.svg)](https://cdn.sheetjs.com/)
+[![GitHub Repo stars](https://img.shields.io/github/stars/SheetJS/sheetjs?style=social)](https://github.com/SheetJS/sheetjs)
+
 [![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/sheetjs?pixel)](https://github.com/SheetJS/sheetjs)

 [![Build Status](https://saucelabs.com/browser-matrix/sheetjs.svg)](https://saucelabs.com/u/sheetjs)
--- a/bits/01_version.js
+++ b/bits/01_version.js
@ -1 +1 @@
-XLSX.version = '0.19.3';
+XLSX.version = '0.18.10';
--- a/bits/02_codepage.js
+++ b/bits/02_codepage.js
@ -41,11 +41,6 @@ function utf16leread(data/*:string*/)/*:string*/ {
 	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data.charCodeAt(2*i) + (data.charCodeAt(2*i+1)<<8));
 	return o.join("");
 }
-function utf16lereadu(data/*:Uint8Array*/)/*:string*/ {
-	var o/*:Array<string>*/ = [];
-	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data[2*i] + (data[2*i+1]<<8));
-	return o.join("");
-}
 function utf16beread(data/*:string*/)/*:string*/ {
 	var o/*:Array<string>*/ = [];
 	for(var i = 0; i < (data.length>>1); ++i) o[i] = String.fromCharCode(data.charCodeAt(2*i+1) + (data.charCodeAt(2*i)<<8));
--- a/bits/05_buf.js
+++ b/bits/05_buf.js
@ -71,7 +71,7 @@ var bconcat = has_buf ? function(bufs) { return Buffer.concat(bufs.map(function(
 		for(i = 0, maxlen = 0; i < bufs.length; maxlen += len, ++i) {
 			len = bufs[i].length;
 			if(bufs[i] instanceof Uint8Array) o.set(bufs[i], maxlen);
-			else if(typeof bufs[i] == "string") o.set(new Uint8Array(s2a(bufs[i])), maxlen);
+			else if(typeof bufs[i] == "string") { throw "wtf"; }
 			else o.set(new Uint8Array(bufs[i]), maxlen);
 		}
 		return o;
--- a/bits/18_cfb.js
+++ b/bits/18_cfb.js
@ -73,7 +73,7 @@ function slice_by_16_tables(T) {
 		for(c = 256 + n; c < 4096; c += 256) v = table[c] = (v >>> 8) ^ T[v & 0xFF];
 	}
 	var out = [];
-	for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' && typeof table.subarray == "function" ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
+	for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
 	return out;
 }
 var TT = slice_by_16_tables(T0);
@ -306,7 +306,7 @@ sleuth_fat(difat_start, difat_sec_cnt, sectors, ssz, fat_addrs);
 /** Chains */
 var sector_list/*:SectorList*/ = make_sector_list(sectors, dir_start, fat_addrs, ssz);

-if(dir_start < sector_list.length) sector_list[dir_start].name = "!Directory";
+sector_list[dir_start].name = "!Directory";
 if(nmfs > 0 && minifat_start !== ENDOFCHAIN) sector_list[minifat_start].name = "!MiniFAT";
 sector_list[fat_addrs[0]].name = "!FAT";
 sector_list.fat_addrs = fat_addrs;
@ -1500,9 +1500,9 @@ function write_zip(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes*/
 		var namebuf = new_buf(fp.length);
 		for(j = 0; j < fp.length; ++j) namebuf.write_shift(1, fp.charCodeAt(j) & 0x7F);
 		namebuf = namebuf.slice(0, namebuf.l);
-		crcs[fcnt] = typeof fi.content == "string" ? CRC32.bstr(fi.content, 0) : CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);
+		crcs[fcnt] = CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);

-		var outbuf = typeof fi.content == "string" ? s2a(fi.content) : fi.content/*::||[]*/;
+		var outbuf = fi.content/*::||[]*/;
 		if(method == 8) outbuf = _deflateRawSync(outbuf);

 		/* local file header */
--- a/bits/23_binutils.js
+++ b/bits/23_binutils.js
@ -181,29 +181,21 @@ function WriteShift(t/*:number*/, val/*:string|number*/, f/*:?string*/)/*:any*/
 		/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 		for(i = 0; i != val.length; ++i) __writeUInt16LE(this, val.charCodeAt(i), this.l + 2 * i);
 		size = 2 * val.length;
-	} else if(f === 'sbcs' || f == 'cpstr') {
+	} else if(f === 'sbcs') {
 		if(typeof $cptable !== 'undefined' && current_ansi == 874) {
 			/* TODO: use tables directly, don't encode */
 			/*:: if(typeof val !== "string") throw new Error("unreachable"); */
 			for(i = 0; i != val.length; ++i) {
-				var cpp = $cptable.utils.encode(current_ansi, val.charAt(i));
-				this[this.l + i] = cpp[0];
+				var cppayload = $cptable.utils.encode(current_ansi, val.charAt(i));
+				this[this.l + i] = cppayload[0];
 			}
-			size = val.length;
-		} else if(typeof $cptable !== 'undefined' && f == 'cpstr') {
-			cpp = $cptable.utils.encode(current_codepage, val);
-			/* replace null bytes with _ when relevant */
-      if(cpp.length == val.length) for(i = 0; i < val.length; ++i) if(cpp[i] == 0 && val.charCodeAt(i) != 0) cpp[i] = 0x5F;
-      if(cpp.length == 2 * val.length) for(i = 0; i < val.length; ++i) if(cpp[2*i] == 0 && cpp[2*i+1] == 0 && val.charCodeAt(i) != 0) cpp[2*i] = 0x5F;
-			for(i = 0; i < cpp.length; ++i) this[this.l + i] = cpp[i];
-			size = cpp.length;
 		} else {
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			val = val.replace(/[^\x00-\x7F]/g, "_");
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			for(i = 0; i != val.length; ++i) this[this.l + i] = (val.charCodeAt(i) & 0xFF);
-			size = val.length;
 		}
+		size = val.length;
 	} else if(f === 'hex') {
 		for(; i < t; ++i) {
 			/*:: if(typeof val !== "string") throw new Error("unreachable"); */
--- a/bits/27_csfutils.js
+++ b/bits/27_csfutils.js
@ -9,6 +9,7 @@ function fix_col(cstr/*:string*/)/*:string*/ { return cstr.replace(/^([A-Z])/,"$
 function unfix_col(cstr/*:string*/)/*:string*/ { return cstr.replace(/^\$([A-Z])/,"$1"); }

 function split_cell(cstr/*:string*/)/*:Array<string>*/ { return cstr.replace(/(\$?[A-Z]*)(\$?\d*)/,"$1,$2").split(","); }
+//function decode_cell(cstr/*:string*/)/*:CellAddress*/ { var splt = split_cell(cstr); return { c:decode_col(splt[0]), r:decode_row(splt[1]) }; }
 function decode_cell(cstr/*:string*/)/*:CellAddress*/ {
 	var R = 0, C = 0;
 	for(var i = 0; i < cstr.length; ++i) {
@ -18,6 +19,7 @@ function decode_cell(cstr/*:string*/)/*:CellAddress*/ {
 	}
 	return { c: C - 1, r:R - 1 };
 }
+//function encode_cell(cell/*:CellAddress*/)/*:string*/ { return encode_col(cell.c) + encode_row(cell.r); }
 function encode_cell(cell/*:CellAddress*/)/*:string*/ {
 	var col = cell.c + 1;
 	var s="";
@ -110,10 +112,9 @@ function sheet_to_workbook(sheet/*:Worksheet*/, opts)/*:Workbook*/ {

 function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksheet*/ {
 	var o = opts || {};
-	var dense = _ws ? (_ws["!data"] != null) : o.dense;
+	var dense = _ws ? Array.isArray(_ws) : o.dense;
 	if(DENSE != null && dense == null) dense = DENSE;
-	var ws/*:Worksheet*/ = _ws || ({}/*:any*/);
-	if(dense && !ws["!data"]) ws["!data"] = [];
+	var ws/*:Worksheet*/ = _ws || (dense ? ([]/*:any*/) : ({}/*:any*/));
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -132,19 +133,13 @@ function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksh
 		range.e.r = Math.max(range.e.r, _range.e.r);
 		if(_R == -1) range.e.r = _R = _range.e.r + 1;
 	}
-	var row = [];
 	for(var R = 0; R != data.length; ++R) {
 		if(!data[R]) continue;
 		if(!Array.isArray(data[R])) throw new Error("aoa_to_sheet expects an array of arrays");
-		var __R = _R + R, __Rstr = "" + (__R + 1);
-		if(dense) {
-			if(!ws["!data"][__R]) ws["!data"][__R] = [];
-			row = ws["!data"][__R];
-		}
 		for(var C = 0; C != data[R].length; ++C) {
 			if(typeof data[R][C] === 'undefined') continue;
 			var cell/*:Cell*/ = ({v: data[R][C] }/*:any*/);
-			var __C = _C + C;
+			var __R = _R + R, __C = _C + C;
 			if(range.s.r > __R) range.s.r = __R;
 			if(range.s.c > __C) range.s.c = __C;
 			if(range.e.r < __R) range.e.r = __R;
@ -168,16 +163,21 @@ function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksh
 				else cell.t = 's';
 			}
 			if(dense) {
-				if(row[__C] && row[__C].z) cell.z = row[__C].z;
-				row[__C] = cell;
+				if(!ws[__R]) ws[__R] = [];
+				if(ws[__R][__C] && ws[__R][__C].z) cell.z = ws[__R][__C].z;
+				ws[__R][__C] = cell;
 			} else {
-				var cell_ref = encode_col(__C) + __Rstr/*:any*/;
+				var cell_ref = encode_cell(({c:__C,r:__R}/*:any*/));
 				if(ws[cell_ref] && ws[cell_ref].z) cell.z = ws[cell_ref].z;
 				ws[cell_ref] = cell;
 			}
 		}
 	}
-	if(range.s.c < 10000000) ws['!ref'] = encode_range(range);
+	if (range.s.c < 10000000) {
+		if (range.s.c > _C) range.s.c = _C;
+		if (range.s.r > _R) range.s.r = _R;
+		ws['!ref'] = encode_range(range);
+	}
 	return ws;
 }
 function aoa_to_sheet(data/*:AOA*/, opts/*:?any*/)/*:Worksheet*/ { return sheet_add_aoa(null, data, opts); }
--- a/bits/31_rels.js
+++ b/bits/31_rels.js
@ -52,7 +52,7 @@ function parse_rels(data/*:?string*/, currentFilePath/*:string*/) {
 		var y = parsexmltag(x);
 		/* 9.3.2.2 OPC_Relationships */
 		if (y[0] === '<Relationship') {
-			var rel = {}; rel.Type = y.Type; rel.Target = unescapexml(y.Target); rel.Id = y.Id; if(y.TargetMode) rel.TargetMode = y.TargetMode;
+			var rel = {}; rel.Type = y.Type; rel.Target = y.Target; rel.Id = y.Id; if(y.TargetMode) rel.TargetMode = y.TargetMode;
 			var canonictarget = y.TargetMode === 'External' ? y.Target : resolve_path(y.Target, currentFilePath);
 			rels[canonictarget] = rel;
 			hash[y.Id] = rel;
--- a/bits/32_odmanrdf.js
+++ b/bits/32_odmanrdf.js
@ -1,61 +1,62 @@
+/* Open Document Format for Office Applications (OpenDocument) Version 1.2 */
+/* Part 3 Section 4 Manifest File */
 var CT_ODS = "application/vnd.oasis.opendocument.spreadsheet";
 function parse_manifest(d, opts) {
-  var str = xlml_normalize(d);
-  var Rn;
-  var FEtag;
-  while (Rn = xlmlregex.exec(str))
-    switch (Rn[3]) {
-      case "manifest":
-        break;
-      case "file-entry":
-        FEtag = parsexmltag(Rn[0], false);
-        if (FEtag.path == "/" && FEtag.type !== CT_ODS)
-          throw new Error("This OpenDocument is not a spreadsheet");
-        break;
-      case "encryption-data":
-      case "algorithm":
-      case "start-key-generation":
-      case "key-derivation":
-        throw new Error("Unsupported ODS Encryption");
-      default:
-        if (opts && opts.WTF)
-          throw Rn;
-    }
+	var str = xlml_normalize(d);
+	var Rn;
+	var FEtag;
+	while((Rn = xlmlregex.exec(str))) switch(Rn[3]) {
+		case 'manifest': break; // 4.2 <manifest:manifest>
+		case 'file-entry': // 4.3 <manifest:file-entry>
+			FEtag = parsexmltag(Rn[0], false);
+			if(FEtag.path == '/' && FEtag.type !== CT_ODS) throw new Error("This OpenDocument is not a spreadsheet");
+			break;
+		case 'encryption-data': // 4.4 <manifest:encryption-data>
+		case 'algorithm': // 4.5 <manifest:algorithm>
+		case 'start-key-generation': // 4.6 <manifest:start-key-generation>
+		case 'key-derivation': // 4.7 <manifest:key-derivation>
+			throw new Error("Unsupported ODS Encryption");
+		default: if(opts && opts.WTF) throw Rn;
+	}
 }
-function write_manifest(manifest) {
-  var o = [XML_HEADER];
-  o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
-  o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
-  for (var i = 0; i < manifest.length; ++i)
-    o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
-  o.push("</manifest:manifest>");
-  return o.join("");
+
+function write_manifest(manifest/*:Array<Array<string> >*/)/*:string*/ {
+	var o = [XML_HEADER];
+	o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
+	o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
+	for(var i = 0; i < manifest.length; ++i) o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
+	o.push('</manifest:manifest>');
+	return o.join("");
 }
-function write_rdf_type(file, res, tag) {
-  return [
-    '  <rdf:Description rdf:about="' + file + '">\n',
-    '    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + "#" + res + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
+
+/* Part 3 Section 6 Metadata Manifest File */
+function write_rdf_type(file/*:string*/, res/*:string*/, tag/*:?string*/) {
+	return [
+		'  <rdf:Description rdf:about="' + file + '">\n',
+		'    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + '#' + res + '"/>\n',
+		'  </rdf:Description>\n'
+	].join("");
 }
-function write_rdf_has(base, file) {
-  return [
-    '  <rdf:Description rdf:about="' + base + '">\n',
-    '    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
+function write_rdf_has(base/*:string*/, file/*:string*/) {
+	return [
+		'  <rdf:Description rdf:about="' + base + '">\n',
+		'    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
+		'  </rdf:Description>\n'
+	].join("");
 }
 function write_rdf(rdf) {
-  var o = [XML_HEADER];
-  o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
-  for (var i = 0; i != rdf.length; ++i) {
-    o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
-    o.push(write_rdf_has("", rdf[i][0]));
-  }
-  o.push(write_rdf_type("", "Document", "pkg"));
-  o.push("</rdf:RDF>");
-  return o.join("");
+	var o = [XML_HEADER];
+	o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
+	for(var i = 0; i != rdf.length; ++i) {
+		o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
+		o.push(write_rdf_has("",rdf[i][0]));
+	}
+	o.push(write_rdf_type("","Document", "pkg"));
+	o.push('</rdf:RDF>');
+	return o.join("");
 }
-function write_meta_ods(wb, opts) {
-  return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>SheetJS ' + XLSX.version + "</meta:generator></office:meta></office:document-meta>";
+/* TODO: pull properties */
+function write_meta_ods(/*:: wb: Workbook, opts: any*/)/*:string*/ {
+	return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>Sheet' + 'JS ' + XLSX.version + '</meta:generator></office:meta></office:document-meta>';
 }
+
--- a/bits/39_xlsbiff.js
+++ b/bits/39_xlsbiff.js
@ -138,7 +138,7 @@ function parse_FtArray(blob, length/*::, ot*/) {
 		var ft = blob.read_shift(2);
 		blob.l-=2;
 		try {
-			fts[ft] = FtTab[ft](blob, tgt - blob.l);
+			fts.push(FtTab[ft](blob, tgt - blob.l));
 		} catch(e) { blob.l = tgt; return fts; }
 	}
 	if(blob.l != tgt) blob.l = tgt; //throw new Error("bad Object Ft-sequence");
@ -696,11 +696,9 @@ function parse_Lbl(blob, length, opts) {
 	};
 }

-/* [MS-XLS] 2.4.106 TODO: legacy record filename encoding */
+/* [MS-XLS] 2.4.106 TODO: verify filename encoding */
 function parse_ExternSheet(blob, length, opts) {
 	if(opts.biff < 8) return parse_BIFF5ExternSheet(blob, length, opts);
-	/* see issue 2907 */
-	if(!(opts.biff > 8) && (length == blob[blob.l] + (blob[blob.l+1] == 0x03 ? 1 : 0) + 1)) return parse_BIFF5ExternSheet(blob, length, opts);
 	var o = [], target = blob.l + length, len = blob.read_shift(opts.biff > 8 ? 4 : 2);
 	while(len-- !== 0) o.push(parse_XTI(blob, opts.biff > 8 ? 12 : 6, opts));
 		// [iSupBook, itabFirst, itabLast];
--- a/bits/40_harb.js
+++ b/bits/40_harb.js
@ -1,3 +1,4 @@
+/* from js-harb (C) 2014-present  SheetJS */
 var DBF_SUPPORTED_VERSIONS = [0x02, 0x03, 0x30, 0x31, 0x83, 0x8B, 0x8C, 0xF5];
 var DBF = /*#__PURE__*/(function() {
 var dbf_codepage_map = {
@ -238,14 +239,14 @@ function dbf_to_workbook(buf, opts)/*:Workbook*/ {
 		var o = sheet_to_workbook(dbf_to_sheet(buf, opts), opts);
 		o.bookType = "dbf";
 		return o;
-	} catch(e) { if(opts && opts.WTF) throw e; }
+	}
+	catch(e) { if(opts && opts.WTF) throw e; }
 	return ({SheetNames:[],Sheets:{}});
 }

 var _RLEN = { 'B': 8, 'C': 250, 'L': 1, 'D': 8, '?': 0, '': 0 };
 function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 	var o = opts || {};
-	var old_cp = current_codepage;
 	if(+o.codepage >= 0) set_cp(+o.codepage);
 	if(o.type == "string") throw new Error("Cannot write DBF to JS string");
 	var ba = buf_array();
@ -281,8 +282,7 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 				case 'object': _guess = col[j] instanceof Date ? 'D' : 'C'; break;
 				default: _guess = 'C';
 			}
-			/* TODO: cache the values instead of encoding twice */
-			maxlen = Math.max(maxlen, (typeof $cptable !== "undefined" && typeof col[j] == "string" ? $cptable.utils.encode(current_ansi, col[j]): String(col[j])).length);
+			maxlen = Math.max(maxlen, String(col[j]).length);
 			guess = guess && guess != _guess ? 'C' : _guess;
 			//if(guess == 'C') break;
 		}
@ -308,17 +308,11 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 	h.write_shift(2, 296 + 32 * hcnt);
 	h.write_shift(2, rlen);
 	for(i=0; i < 4; ++i) h.write_shift(4, 0);
-	var cp = +dbf_reverse_map[/*::String(*/current_codepage/*::)*/] || 0x03;
-	h.write_shift(4, 0x00000000 | (cp<<8));
-	if(dbf_codepage_map[cp] != +o.codepage) {
-		if(o.codepage) console.error("DBF Unsupported codepage " + current_codepage + ", using 1252");
-		current_codepage = 1252;
-	}
+	h.write_shift(4, 0x00000000 | ((+dbf_reverse_map[/*::String(*/current_ansi/*::)*/] || 0x03)<<8));

 	for(i = 0, j = 0; i < headers.length; ++i) {
 		if(headers[i] == null) continue;
 		var hf = ba.next(32);
-		/* TODO: test how applications handle non-ASCII field names */
 		var _f = (headers[i].slice(-10) + "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00").slice(0, 11);
 		hf.write_shift(1, _f, "sbcs");
 		hf.write_shift(1, coltypes[i] == '?' ? 'C' : coltypes[i], "sbcs");
@ -347,7 +341,6 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 				case 'N':
 					var _n = "0";
 					if(typeof data[i][j] == "number") _n = data[i][j].toFixed(coldecimals[j]||0);
-					if(_n.length > colwidths[j]) _n = _n.slice(0, colwidths[j]); // addresses decimal > width
 					for(hcnt=0; hcnt < colwidths[j]-_n.length; ++hcnt) rout.write_shift(1, 0x20);
 					rout.write_shift(1, _n, "sbcs");
 					break;
@ -359,16 +352,13 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 						rout.write_shift(2, ("00"+data[i][j].getDate()).slice(-2), "sbcs");
 					} break;
 				case 'C':
-					var _l = rout.l;
 					var _s = String(data[i][j] != null ? data[i][j] : "").slice(0, colwidths[j]);
-					rout.write_shift(1, _s, "cpstr");
-					_l += colwidths[j] - rout.l;
-					for(hcnt=0; hcnt < _l; ++hcnt) rout.write_shift(1, 0x20); break;
+					rout.write_shift(1, _s, "sbcs");
+					for(hcnt=0; hcnt < colwidths[j]-_s.length; ++hcnt) rout.write_shift(1, 0x20); break;
 			}
 		}
 		// data
 	}
-	current_codepage = old_cp;
 	ba.next(1).write_shift(1, 0x1A);
 	return ba.end();
 }
@ -579,7 +569,7 @@ var SYLK = /*#__PURE__*/(function() {
 			case 'b': o += cell.v ? "TRUE" : "FALSE"; break;
 			case 'e': o += cell.w || cell.v; break;
 			case 'd': o += '"' + (cell.w || cell.v) + '"'; break;
-			case 's': o += '"' + (cell.v == null ? "" : String(cell.v)).replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
+			case 's': o += '"' + cell.v.replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
 		}
 		return o;
 	}
@ -608,10 +598,9 @@ var SYLK = /*#__PURE__*/(function() {
 	}

 	function sheet_to_sylk(ws/*:Worksheet*/, opts/*:?any*/, wb/*:?WorkBook*/)/*:string*/ {
-		/* TODO: codepage */
 		var preamble/*:Array<string>*/ = ["ID;PSheetJS;N;E"], o/*:Array<string>*/ = [];
 		var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		var RS = "\r\n";
 		var d1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;

@ -623,10 +612,10 @@ var SYLK = /*#__PURE__*/(function() {
 		preamble.push("B;Y" + (r.e.r - r.s.r + 1) + ";X" + (r.e.c - r.s.c + 1) + ";D" + [r.s.c,r.s.r,r.e.c,r.e.r].join(" "));
 		preamble.push("O;L;D;B" + (d1904 ? ";V4" : "") + ";K47;G100 0.001");
 		for(var R = r.s.r; R <= r.e.r; ++R) {
-			if(dense && !ws["!data"][R]) continue;
 			var p = [];
 			for(var C = r.s.c; C <= r.e.c; ++C) {
-				cell = dense ? ws["!data"][R][C] : ws[encode_col(C) + encode_row(R)];
+				var coord = encode_cell({r:R,c:C});
+				cell = dense ? (ws[R]||[])[C]: ws[coord];
 				if(!cell || (cell.v == null && (!cell.f || cell.F))) continue;
 				p.push(write_ws_cell_sylk(cell, ws, R, C, opts)); // TODO: pass date1904 info
 			}
@ -694,55 +683,62 @@ var DIF = /*#__PURE__*/(function() {
 		return o;
 	}

-	function make_value(v/*:number*/, s/*:string*/)/*:string*/ { return "0," + String(v) + "\r\n" + s; }
-	function make_value_str(s/*:string*/)/*:string*/ { return "1,0\r\n\"" + s.replace(/"/g,'""') + '"'; }
-	function sheet_to_dif(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
-		var _DIF_XL = DIF_XL;
-		var r = safe_decode_range(ws['!ref']);
-		var dense = ws["!data"] != null;
-		var o/*:Array<string>*/ = [
-			"TABLE\r\n0,1\r\n\"sheetjs\"\r\n",
-			"VECTORS\r\n0," + (r.e.r - r.s.r + 1) + "\r\n\"\"\r\n",
-			"TUPLES\r\n0," + (r.e.c - r.s.c + 1) + "\r\n\"\"\r\n",
-			"DATA\r\n0,0\r\n\"\"\r\n"
-		];
-		for(var R = r.s.r; R <= r.e.r; ++R) {
-			var row = dense ? ws["!data"][R] : [];
-			var p = "-1,0\r\nBOT\r\n";
-			for(var C = r.s.c; C <= r.e.c; ++C) {
-				var cell/*:Cell*/ = dense ? (row && row[C]) : ws[encode_cell({r:R,c:C})];
-				if(cell == null) { p +=("1,0\r\n\"\"\r\n"); continue;}
-				switch(cell.t) {
-					case 'n':
-						if(_DIF_XL) {
-							if(cell.w != null) p +=("0," + cell.w + "\r\nV");
-							else if(cell.v != null) p +=(make_value(cell.v, "V")); // TODO: should this call SSF_format?
-							else if(cell.f != null && !cell.F) p +=(make_value_str("=" + cell.f));
-							else p +=("1,0\r\n\"\"");
-						} else {
-							if(cell.v == null) p +=("1,0\r\n\"\"");
-							else p +=(make_value(cell.v, "V"));
-						}
-						break;
-					case 'b':
-						p +=(cell.v ? make_value(1, "TRUE") : make_value(0, "FALSE"));
-						break;
-					case 's':
-						p +=(make_value_str((!_DIF_XL || isNaN(+cell.v)) ? cell.v : '="' + cell.v + '"'));
-						break;
-					case 'd':
-						if(!cell.w) cell.w = SSF_format(cell.z || table_fmt[14], datenum(parseDate(cell.v)));
-						if(_DIF_XL) p +=(make_value(cell.w, "V"));
-						else p +=(make_value_str(cell.w));
-						break;
-					default: p +=("1,0\r\n\"\"");
+	var sheet_to_dif = /*#__PURE__*/(function() {
+		var push_field = function pf(o/*:Array<string>*/, topic/*:string*/, v/*:number*/, n/*:number*/, s/*:string*/) {
+			o.push(topic);
+			o.push(v + "," + n);
+			o.push('"' + s.replace(/"/g,'""') + '"');
+		};
+		var push_value = function po(o/*:Array<string>*/, type/*:number*/, v/*:any*/, s/*:string*/) {
+			o.push(type + "," + v);
+			o.push(type == 1 ? '"' + s.replace(/"/g,'""') + '"' : s);
+		};
+		return function sheet_to_dif(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
+			var o/*:Array<string>*/ = [];
+			var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
+			var dense = Array.isArray(ws);
+			push_field(o, "TABLE", 0, 1, "sheetjs");
+			push_field(o, "VECTORS", 0, r.e.r - r.s.r + 1,"");
+			push_field(o, "TUPLES", 0, r.e.c - r.s.c + 1,"");
+			push_field(o, "DATA", 0, 0,"");
+			for(var R = r.s.r; R <= r.e.r; ++R) {
+				push_value(o, -1, 0, "BOT");
+				for(var C = r.s.c; C <= r.e.c; ++C) {
+					var coord = encode_cell({r:R,c:C});
+					cell = dense ? (ws[R]||[])[C] : ws[coord];
+					if(!cell) { push_value(o, 1, 0, ""); continue;}
+					switch(cell.t) {
+						case 'n':
+							var val = DIF_XL ? cell.w : cell.v;
+							if(!val && cell.v != null) val = cell.v;
+							if(val == null) {
+								if(DIF_XL && cell.f && !cell.F) push_value(o, 1, 0, "=" + cell.f);
+								else push_value(o, 1, 0, "");
+							}
+							else push_value(o, 0, val, "V");
+							break;
+						case 'b':
+							push_value(o, 0, cell.v ? 1 : 0, cell.v ? "TRUE" : "FALSE");
+							break;
+						case 's':
+							push_value(o, 1, 0, (!DIF_XL || isNaN(cell.v)) ? cell.v : '="' + cell.v + '"');
+							break;
+						case 'd':
+							if(!cell.w) cell.w = SSF_format(cell.z || table_fmt[14], datenum(parseDate(cell.v)));
+							if(DIF_XL) push_value(o, 0, cell.w, "V");
+							else push_value(o, 1, 0, cell.w);
+							break;
+						default: push_value(o, 1, 0, "");
+					}
 				}
-				p += "\r\n";
 			}
-			o.push(p);
-		}
-		return o.join("") + "-1,0\r\nEOD";
-	}
+			push_value(o, -1, 0, "EOD");
+			var RS = "\r\n";
+			var oo = o.join(RS);
+			//while((oo.length & 0x7F) != 0) oo += "\0";
+			return oo;
+		};
+	})();
 	return {
 		to_workbook: dif_to_workbook,
 		to_sheet: dif_to_sheet,
@ -805,11 +801,11 @@ var ETH = /*#__PURE__*/(function() {
 		if(!ws || !ws['!ref']) return "";
 		var o/*:Array<string>*/ = [], oo/*:Array<string>*/ = [], cell, coord = "";
 		var r = decode_range(ws['!ref']);
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		for(var R = r.s.r; R <= r.e.r; ++R) {
 			for(var C = r.s.c; C <= r.e.c; ++C) {
 				coord = encode_cell({r:R,c:C});
-				cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+				cell = dense ? (ws[R]||[])[C] : ws[coord];
 				if(!cell || cell.v == null || cell.t === 'z') continue;
 				oo = ["cell", coord, 't'];
 				switch(cell.t) {
@ -931,8 +927,7 @@ var PRN = /*#__PURE__*/(function() {
 		var o = opts || {};
 		var sep = "";
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var ws/*:Worksheet*/ = ({}/*:any*/);
-		if(o.dense) ws["!data"] = [];
+		var ws/*:Worksheet*/ = o.dense ? ([]/*:any*/) : ({}/*:any*/);
 		var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:0, r:0}}/*:any*/);

 		if(str.slice(0,4) == "sep=") {
@ -978,7 +973,7 @@ var PRN = /*#__PURE__*/(function() {
 				cell.v = s;
 			}
 			if(cell.t == 'z'){}
-			else if(o.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = cell; }
+			else if(o.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = cell; }
 			else ws[encode_cell({c:C,r:R})] = cell;
 			start = end+1; startcc = str.charCodeAt(start);
 			if(range.e.c < C) range.e.c = C;
@ -1034,12 +1029,12 @@ var PRN = /*#__PURE__*/(function() {
 	function sheet_to_prn(ws/*:Worksheet*//*::, opts:?any*/)/*:string*/ {
 		var o/*:Array<string>*/ = [];
 		var r = safe_decode_range(ws['!ref']), cell/*:Cell*/;
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		for(var R = r.s.r; R <= r.e.r; ++R) {
 			var oo/*:Array<string>*/ = [];
 			for(var C = r.s.c; C <= r.e.c; ++C) {
 				var coord = encode_cell({r:R,c:C});
-				cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+				cell = dense ? (ws[R]||[])[C] : ws[coord];
 				if(!cell || cell.v == null) { oo.push("          "); continue; }
 				var w = (cell.w || (format_cell(cell), cell.w) || "").slice(0,10);
 				while(w.length < 10) w += " ";
--- a/bits/41_lotus.js
+++ b/bits/41_lotus.js
@ -28,9 +28,8 @@ var WK_ = /*#__PURE__*/(function() {
 		if(!d) return d;
 		var o = opts || {};
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var s/*:Worksheet*/ = ({}/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
-		var sheets = {}, snames = [], realnames = [], sdata = [];
-		if(o.dense) sdata = s["!data"] = [];
+		var s/*:Worksheet*/ = ((o.dense ? [] : {})/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
+		var sheets = {}, snames = [], realnames = [];

 		var refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 		var sheetRows = o.sheetRows || 0;
@ -75,13 +74,13 @@ var WK_ = /*#__PURE__*/(function() {
 							s["!ref"] = encode_range(refguess);
 							sheets[n] = s;
 							snames.push(n);
-							s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
+							s = (o.dense ? [] : {});
 							refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 							sidx = val[3]; n = next_n || "Sheet" + (sidx + 1); next_n = "";
 						}
 					}

-					var tmpcell = o.dense ? (sdata[val[0].r]||[])[val[0].c] : s[encode_cell(val[0])];
+					var tmpcell = o.dense ? (s[val[0].r]||[])[val[0].c] : s[encode_cell(val[0])];
 					if(tmpcell) {
 						tmpcell.t = val[1].t; tmpcell.v = val[1].v;
 						if(val[1].z != null) tmpcell.z = val[1].z;
@ -89,8 +88,8 @@ var WK_ = /*#__PURE__*/(function() {
 						break;
 					}
 					if(o.dense) {
-						if(!sdata[val[0].r]) sdata[val[0].r] = [];
-						sdata[val[0].r][val[0].c] = val[1];
+						if(!s[val[0].r]) s[val[0].r] = [];
+						s[val[0].r][val[0].c] = val[1];
 					} else s[encode_cell(val[0])] = val[1];
 					break;
 				case 0x5405: o.works2 = true; break;
@ -116,14 +115,14 @@ var WK_ = /*#__PURE__*/(function() {
 						s["!ref"] = encode_range(refguess);
 						sheets[n] = s;
 						snames.push(n);
-						s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
+						s = (o.dense ? [] : {});
 						refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 						sidx = val[3]; n = "Sheet" + (sidx + 1);
 					}
 					if(sheetRows > 0 && val[0].r >= sheetRows) break;
 					if(o.dense) {
-						if(!sdata[val[0].r]) sdata[val[0].r] = [];
-						sdata[val[0].r][val[0].c] = val[1];
+						if(!s[val[0].r]) s[val[0].r] = [];
+						s[val[0].r][val[0].c] = val[1];
 					} else s[encode_cell(val[0])] = val[1];
 					if(refguess.e.c < val[0].c) refguess.e.c = val[0].c;
 					if(refguess.e.r < val[0].r) refguess.e.r = val[0].r;
@ -158,17 +157,18 @@ var WK_ = /*#__PURE__*/(function() {
 		if(o.type == "string") throw new Error("Cannot write WK1 to JS string");
 		var ba = buf_array();
 		var range = safe_decode_range(ws["!ref"]);
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		var cols = [];

 		write_biff_rec(ba, 0x00, write_BOF_WK1(0x0406));
 		write_biff_rec(ba, 0x06, write_RANGE(range));
 		var max_R = Math.min(range.e.r, 8191);
-		for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 		for(var R = range.s.r; R <= max_R; ++R) {
 			var rr = encode_row(R);
-			for(C = range.s.c; C <= range.e.c; ++C) {
-				var cell = dense ? (ws["!data"][R]||[])[C] : ws[cols[C] + rr];
+			for(var C = range.s.c; C <= range.e.c; ++C) {
+				if(R === range.s.r) cols[C] = encode_col(C);
+				var ref = cols[C] + rr;
+				var cell = dense ? (ws[R]||[])[C] : ws[ref];
 				if(!cell || cell.t == "z") continue;
 				/* TODO: formula records */
 				if(cell.t == "n") {
@ -200,7 +200,7 @@ var WK_ = /*#__PURE__*/(function() {
 			var ws = wb.Sheets[wb.SheetNames[i]];
 			if(!ws || !ws["!ref"]) continue;
 			var range = safe_decode_range(ws["!ref"]);
-			var dense = ws["!data"] != null;
+			var dense = Array.isArray(ws);
 			var cols = [];
 			var max_R = Math.min(range.e.r, 8191);
 			for(var R = range.s.r; R <= max_R; ++R) {
@ -208,7 +208,7 @@ var WK_ = /*#__PURE__*/(function() {
 				for(var C = range.s.c; C <= range.e.c; ++C) {
 					if(R === range.s.r) cols[C] = encode_col(C);
 					var ref = cols[C] + rr;
-					var cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+					var cell = dense ? (ws[R]||[])[C] : ws[ref];
 					if(!cell || cell.t == "z") continue;
 					/* TODO: FORMULA19 NUMBER18 records */
 					if(cell.t == "n") {
@ -919,7 +919,7 @@ var WK_ = /*#__PURE__*/(function() {
 		prep_blob(d, 0);
 		var o = opts || {};
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var s/*:Worksheet*/ = ({}/*:any*/); if(o.dense) s["!data"] = [];
+		var s/*:Worksheet*/ = ((o.dense ? [] : {})/*:any*/);
 		var SST = [], sname = "", formulae = [];
 		var range = {s:{r:-1,c:-1}, e:{r:-1,c:-1}};
 		var cnt = 0, type = 0, C = 0, R = 0;
@ -956,7 +956,7 @@ var WK_ = /*#__PURE__*/(function() {

 				case 0x0601: { /* BOS */
 					var sidx = p.read_shift(2);
-					s = ({}/*:any*/); if(o.dense) s["!data"] = [];
+					s = ((o.dense ? [] : {})/*:any*/);
 					range.s.c = p.read_shift(2);
 					range.e.c = p.read_shift(2);
 					range.s.r = p.read_shift(4);
@ -993,7 +993,6 @@ var WK_ = /*#__PURE__*/(function() {
 					R = p.read_shift(4), cnt = p.read_shift(4);
 					if(range.s.r > R) range.s.r = R;
 					if(range.e.r < R + cnt - 1) range.e.r = R + cnt - 1;
-					var CC = encode_col(C);
 					while(p.l < p.length) {
 						var cell = { t: "z" };
 						var flags = p.read_shift(1);
@ -1016,10 +1015,10 @@ var WK_ = /*#__PURE__*/(function() {
 							default: throw "Unsupported delta for QPW cell type " + (flags & 0x1F);
 						}
 						if(!(!o.sheetStubs && cell.t == "z")) {
-							if(s["!data"] != null) {
-								if(!s["!data"][R]) s["!data"][R] = [];
-								s["!data"][R][C] = cell;
-							} else s[CC + encode_row(R)] = cell;
+							if(Array.isArray(s)) {
+								if(!s[R]) s[R] = [];
+								s[R][C] = cell;
+							} else s[encode_cell({r:R, c:C})] = cell;
 						}
 						++R; --cnt;
 						while(mul-- > 0 && cnt >= 0) {
@ -1035,10 +1034,10 @@ var WK_ = /*#__PURE__*/(function() {
 								default: throw "Cannot apply repeat for QPW cell type " + (flags & 0x1F);
 							}
 							if(!(!o.sheetStubs && cell.t == "z")) {
-								if(s["!data"] != null) {
-									if(!s["!data"][R]) s["!data"][R] = [];
-									s["!data"][R][C] = cell;
-								} else s[CC + encode_row(R)] = cell;
+								if(Array.isArray(s)) {
+									if(!s[R]) s[R] = [];
+									s[R][C] = cell;
+								} else s[encode_cell({r:R, c:C})] = cell;
 							}
 							++R; --cnt;
 						}
--- a/bits/42_sstxml.js
+++ b/bits/42_sstxml.js
@ -168,7 +168,7 @@ var rs_to_html = /*#__PURE__*/(function parse_rs_factory() {
 })();

 /* 18.4.8 si CT_Rst */
-var sitregex = /<(?:\w+:)?t[^>]*>([^<]*)<\/(?:\w+:)?t>/g, sirregex = /<(?:\w+:)?r\b[^>]*>/;
+var sitregex = /<(?:\w+:)?t[^>]*>([^<]*)<\/(?:\w+:)?t>/g, sirregex = /<(?:\w+:)?r>/;
 var sirphregex = /<(?:\w+:)?rPh.*?>([\s\S]*?)<\/(?:\w+:)?rPh>/g;
 function parse_si(x, opts) {
 	var html = opts ? opts.cellHTML : true;
@ -229,7 +229,6 @@ function write_sst_xml(sst/*:SST*/, opts)/*:string*/ {
 		else {
 			sitag += "<t";
 			if(!s.t) s.t = "";
-			if(typeof s.t !== "string") s.t = String(s.t);
 			if(s.t.match(straywsregex)) sitag += ' xml:space="preserve"';
 			sitag += ">" + escapexml(s.t) + "</t>";
 		}
--- a/bits/45_rtf.js
+++ b/bits/45_rtf.js
@ -13,18 +13,14 @@ function rtf_to_sheet(d, opts) {
 }
 function rtf_to_sheet_str(str, opts) {
  var o = opts || {};
-  var ws = {};
-  var dense = o.dense;
-  if (dense)
-    ws["!data"] = [];
+  var ws = o.dense ? [] : {};
  var rows = str.match(/\\trowd[\s\S]*?\\row\b/g);
  if (!rows)
    throw new Error("RTF missing table");
  var range = { s: { c: 0, r: 0 }, e: { c: 0, r: rows.length - 1 } };
-  var row = [];
  rows.forEach(function(rowtf, R) {
-    if (dense)
-      row = ws["!data"][R] = [];
+    if (Array.isArray(ws))
+      ws[R] = [];
    var rtfre = /\\[\w\-]+\b/g;
    var last_index = 0;
    var res;
@ -50,8 +46,8 @@ function rtf_to_sheet_str(str, opts) {
                cell.w = cell.v;
              cell.v = fuzzynum(cell.v);
            }
-            if (dense)
-              row[C] = cell;
+            if (Array.isArray(ws))
+              ws[R][C] = cell;
            else
              ws[encode_cell({ r: R, c: C })] = cell;
          }
@ -79,17 +75,15 @@ function sheet_to_rtf(ws, opts) {
  if (!ws["!ref"])
    return o[0] + "}";
  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = ws["!data"] != null, row = [];
+  var dense = Array.isArray(ws);
  for (var R = r.s.r; R <= r.e.r; ++R) {
    o.push("\\trowd\\trautofit1");
    for (var C = r.s.c; C <= r.e.c; ++C)
      o.push("\\cellx" + (C + 1));
    o.push("\\pard\\intbl");
-    if (dense)
-      row = ws["!data"][R] || [];
    for (C = r.s.c; C <= r.e.c; ++C) {
      var coord = encode_cell({ r: R, c: C });
-      cell = dense ? row[C] : ws[coord];
+      cell = dense ? (ws[R] || [])[C] : ws[coord];
      if (!cell || cell.v == null && (!cell.f || cell.F)) {
        o.push(" \\cell");
        continue;
--- a/bits/51_xlsxmeta.js
+++ b/bits/51_xlsxmeta.js
@ -71,7 +71,7 @@ function parse_xlmeta_xml(data, name, opts) {
        lastmeta.offsets.push(+y.i);
        break;
      default:
-        if (!pass && (opts == null ? void 0 : opts.WTF))
+        if (!pass && opts.WTF)
          throw new Error("unrecognized " + y[0] + " in metadata");
    }
    return x;
--- a/bits/56_cmntcommon.js
+++ b/bits/56_cmntcommon.js
@ -1,16 +1,15 @@
-function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
-	var dense = sheet["!data"] != null;
+function sheet_insert_comments(sheet, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
+	var dense = Array.isArray(sheet);
 	var cell/*:Cell*/;
 	comments.forEach(function(comment) {
 		var r = decode_cell(comment.ref);
-		if(r.r < 0 || r.c < 0) return;
 		if(dense) {
-			if(!sheet["!data"][r.r]) sheet["!data"][r.r] = [];
-			cell = sheet["!data"][r.r][r.c];
+			if(!sheet[r.r]) sheet[r.r] = [];
+			cell = sheet[r.r][r.c];
 		} else cell = sheet[comment.ref];
 		if (!cell) {
 			cell = ({t:"z"}/*:any*/);
-			if(dense) sheet["!data"][r.r][r.c] = cell;
+			if(dense) sheet[r.r][r.c] = cell;
 			else sheet[comment.ref] = cell;
 			var range = safe_decode_range(sheet["!ref"]||"BDWGO1000001:A1");
 			if(range.s.r > r.r) range.s.r = r.r;
@ -18,7 +17,7 @@ function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>
 			if(range.s.c > r.c) range.s.c = r.c;
 			if(range.e.c < r.c) range.e.c = r.c;
 			var encoded = encode_range(range);
-			sheet["!ref"] = encoded;
+			if (encoded !== sheet["!ref"]) sheet["!ref"] = encoded;
 		}

 		if (!cell.c) cell.c = [];
@ -36,3 +35,4 @@ function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>
 		cell.c.push(o);
 	});
 }
+
--- a/bits/57_cmntxml.js
+++ b/bits/57_cmntxml.js
@ -50,27 +50,21 @@ function write_comments_xml(data/*::, opts*/) {
 	o.push("<commentList>");
 	data.forEach(function(d) {
 		/* 18.7.3 CT_Comment */
-		var lastauthor = 0, ts = [], tcnt = 0;
+		var lastauthor = 0, ts = [];
 		if(d[1][0] && d[1][0].T && d[1][0].ID) lastauthor = iauthor.indexOf("tc=" + d[1][0].ID);
-		d[1].forEach(function(c) {
+		else d[1].forEach(function(c) {
 			if(c.a) lastauthor = iauthor.indexOf(escapexml(c.a));
-			if(c.T) ++tcnt;
-			ts.push(c.t == null ? "" : escapexml(c.t));
+			ts.push(c.t||"");
 		});
-		if(tcnt === 0) {
-			d[1].forEach(function(c) {
-				o.push('<comment ref="' + d[0] + '" authorId="' + iauthor.indexOf(escapexml(c.a)) + '"><text>');
-				o.push(writetag("t", c.t == null ? "" : escapexml(c.t)));
-				o.push('</text></comment>');
-			});
-		} else {
+		o.push('<comment ref="' + d[0] + '" authorId="' + lastauthor + '"><text>');
+		if(ts.length <= 1) o.push(writetag("t", escapexml(ts[0]||"")));
+		else {
 			/* based on Threaded Comments -> Comments projection */
-			o.push('<comment ref="' + d[0] + '" authorId="' + lastauthor + '"><text>');
 			var t = "Comment:\n    " + (ts[0]) + "\n";
 			for(var i = 1; i < ts.length; ++i) t += "Reply:\n    " + ts[i] + "\n";
 			o.push(writetag("t", escapexml(t)));
-			o.push('</text></comment>');
 		}
+		o.push('</text></comment>');
 	});
 	o.push("</commentList>");
 	if(o.length>2) { o[o.length] = ('</comments>'); o[1]=o[1].replace("/>",">"); }
--- a/bits/67_wsxml.js
+++ b/bits/67_wsxml.js
@ -20,7 +20,7 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;

 	/* 18.3.1.99 worksheet CT_Worksheet */
-	var s = ({}/*:any*/); if(opts.dense) s["!data"] = [];
+	var s = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 	var refguess/*:Range*/ = ({s: {r:2000000, c:2000000}, e: {r:0, c:0} }/*:any*/);

 	var data1 = "", data2 = "";
@ -39,7 +39,7 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	var ridx = (data1.match(/<(?:\w*:)?dimension/)||{index:-1}).index;
 	if(ridx > 0) {
 		var ref = data1.slice(ridx,ridx+50).match(dimregex);
-		if(ref && !(opts && opts.nodim)) parse_ws_xml_dim(s, ref[1]);
+		if(ref) parse_ws_xml_dim(s, ref[1]);
 	}

 	/* 18.3.1.88 sheetViews CT_SheetViews */
@ -75,7 +75,6 @@ function parse_ws_xml(data/*:?string*/, opts, idx/*:number*/, rels, wb/*:WBWBPro
 	var margins = data2.match(marginregex);
 	if(margins) s['!margins'] = parse_ws_xml_margins(parsexmltag(margins[0]));

-	if(opts && opts.nodim) refguess.s.c = refguess.s.r = 0;
 	if(!s["!ref"] && refguess.e.c >= refguess.s.c && refguess.e.r >= refguess.s.r) s["!ref"] = encode_range(refguess);
 	if(opts.sheetRows > 0 && s["!ref"]) {
 		var tmpref = safe_decode_range(s["!ref"]);
@ -150,7 +149,7 @@ function write_ws_xml_protection(sp)/*:string*/ {
 }

 function parse_ws_xml_hlinks(s, data/*:Array<string>*/, rels) {
-	var dense = s["!data"] != null;
+	var dense = Array.isArray(s);
 	for(var i = 0; i != data.length; ++i) {
 		var val = parsexmltag(utf8read(data[i]), true);
 		if(!val.ref) return;
@ -166,11 +165,11 @@ function parse_ws_xml_hlinks(s, data/*:Array<string>*/, rels) {
 		if(val.tooltip) { val.Tooltip = val.tooltip; delete val.tooltip; }
 		var rng = safe_decode_range(val.ref);
 		for(var R=rng.s.r;R<=rng.e.r;++R) for(var C=rng.s.c;C<=rng.e.c;++C) {
-			var addr = encode_col(C) + encode_row(R);
+			var addr = encode_cell({c:C,r:R});
 			if(dense) {
-				if(!s["!data"][R]) s["!data"][R] = [];
-				if(!s["!data"][R][C]) s["!data"][R][C] = {t:"z",v:undefined};
-				s["!data"][R][C].l = val;
+				if(!s[R]) s[R] = [];
+				if(!s[R][C]) s[R][C] = {t:"z",v:undefined};
+				s[R][C].l = val;
 			} else {
 				if(!s[addr]) s[addr] = {t:"z",v:undefined};
 				s[addr].l = val;
@ -264,10 +263,7 @@ function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts/*::, idx, wb*/)/*:string
 	var oldt = cell.t, oldv = cell.v;
 	if(cell.t !== "z") switch(cell.t) {
 		case 'b': vv = cell.v ? "1" : "0"; break;
-		case 'n':
-			if(isNaN(cell.v)) { cell.t = "e"; vv = BErr[cell.v = 0x24]; } // #NUM!
-			else if(!isFinite(cell.v)) { cell.t = "e"; vv = BErr[cell.v = 0x07]; } // #DIV/0!
-			else vv = ''+cell.v; break;
+		case 'n': vv = ''+cell.v; break;
 		case 'e': vv = BErr[cell.v]; break;
 		case 'd':
 			if(opts && opts.cellDates) vv = parseDate(cell.v, -1).toISOString();
@ -303,10 +299,7 @@ function write_ws_xml_cell(cell/*:Cell*/, ref, ws, opts/*::, idx, wb*/)/*:string
 		var ff = cell.F && cell.F.slice(0, ref.length) == ref ? {t:"array", ref:cell.F} : null;
 		v = writextag('f', escapexml(cell.f), ff) + (cell.v != null ? v : "");
 	}
-	if(cell.l) {
-		cell.l.display = escapexml(vv);
-		ws['!links'].push([ref, cell.l]);
-	}
+	if(cell.l) ws['!links'].push([ref, cell.l]);
 	if(cell.D) o.cm = 1;
 	return writextag('c', v, o);
 }
@ -325,7 +318,7 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 	var do_format = Array.isArray(styles.CellXf), cf;
 	var arrayf/*:Array<[Range, string]>*/ = [];
 	var sharedf = [];
-	var dense = s["!data"] != null;
+	var dense = Array.isArray(s);
 	var rows/*:Array<RowInfo>*/ = [], rowobj = {}, rowrite = false;
 	var sheetStubs = !!opts.sheetStubs;
 	for(var marr = sdata.split(rowregex), mt = 0, marrlen = marr.length; mt != marrlen; ++mt) {
@ -356,10 +349,8 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 		tag = parsexmltag(x.slice(rstarti,ri), true);
 		tagr = tag.r != null ? parseInt(tag.r, 10) : tagr+1; tagc = -1;
 		if(opts.sheetRows && opts.sheetRows < tagr) continue;
-		if(!opts.nodim) {
-			if(guess.s.r > tagr - 1) guess.s.r = tagr - 1;
-			if(guess.e.r < tagr - 1) guess.e.r = tagr - 1;
-		}
+		if(guess.s.r > tagr - 1) guess.s.r = tagr - 1;
+		if(guess.e.r < tagr - 1) guess.e.r = tagr - 1;

 		if(opts && opts.cellStyles) {
 			rowobj = {}; rowrite = false;
@ -490,16 +481,10 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th
 				var cm = (opts.xlmeta.Cell||[])[+tag.cm-1];
 				if(cm && cm.type == 'XLDAPR') p.D = true;
 			}
-			var _r;
-			if(opts.nodim) {
-				_r = decode_cell(tag.r);
-				if(guess.s.r > _r.r) guess.s.r = _r.r;
-				if(guess.e.r < _r.r) guess.e.r = _r.r;
-			}
 			if(dense) {
-				_r = decode_cell(tag.r);
-				if(!s["!data"][_r.r]) s["!data"][_r.r] = [];
-				s["!data"][_r.r][_r.c] = p;
+				var _r = decode_cell(tag.r);
+				if(!s[_r.r]) s[_r.r] = [];
+				s[_r.r][_r.c] = p;
 			} else s[tag.r] = p;
 		}
 	}
@ -508,7 +493,7 @@ return function parse_ws_xml_data(sdata/*:string*/, s, opts, guess/*:Range*/, th

 function write_ws_xml_data(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbook*//*::, rels*/)/*:string*/ {
 	var o/*:Array<string>*/ = [], r/*:Array<string>*/ = [], range = safe_decode_range(ws['!ref']), cell="", ref, rr = "", cols/*:Array<string>*/ = [], R=0, C=0, rows = ws['!rows'];
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var params = ({r:rr}/*:any*/), row/*:RowInfo*/, height = -1;
 	for(C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 	for(R = range.s.r; R <= range.e.r; ++R) {
@ -516,7 +501,7 @@ function write_ws_xml_data(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbook
 		rr = encode_row(R);
 		for(C = range.s.c; C <= range.e.c; ++C) {
 			ref = cols[C] + rr;
-			var _cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
+			var _cell = dense ? (ws[R]||[])[C]: ws[ref];
 			if(_cell === undefined) continue;
 			if((cell = write_ws_xml_cell(_cell, ref, ws, opts, idx, wb)) != null) r.push(cell);
 		}
@ -624,7 +609,6 @@ function write_ws_xml(idx/*:number*/, opts, wb/*:Workbook*/, rels)/*:string*/ {
 			}
 			if((relc = l[1].Target.indexOf("#")) > -1) rel.location = escapexml(l[1].Target.slice(relc+1));
 			if(l[1].Tooltip) rel.tooltip = escapexml(l[1].Tooltip);
-			rel.display = l[1].display;
 			o[o.length] = writextag("hyperlink",null,rel);
 		});
 		o[o.length] = "</hyperlinks>";
--- a/bits/68_wsbin.js
+++ b/bits/68_wsbin.js
@ -41,13 +41,12 @@ function write_BrtRowHdr(R/*:number*/, range, ws) {
 	o.l += 4;

 	var caddr = {r:R, c:0};
-	var dense = ws["!data"] != null;
 	for(var i = 0; i < 16; ++i) {
 		if((range.s.c > ((i+1) << 10)) || (range.e.c < (i << 10))) continue;
 		var first = -1, last = -1;
 		for(var j = (i<<10); j < ((i+1)<<10); ++j) {
 			caddr.c = j;
-			var cell = dense ? (ws["!data"][caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
+			var cell = Array.isArray(ws) ? (ws[caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
 			if(cell) { if(first < 0) first = j; last = j; }
 		}
 		if(first < 0) continue;
@ -259,10 +258,9 @@ function parse_BrtCellSt(data) {
 	return [cell, value, 'str'];
 }
 function write_BrtCellSt(cell, ncell, o) {
-	var data = cell.v == null ? "" : String(cell.v);
 	if(o == null) o = new_buf(12 + 4 * cell.v.length);
 	write_XLSBCell(ncell, o);
-	write_XLWideString(data, o);
+	write_XLWideString(cell.v, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }
 function parse_BrtShortSt(data) {
@ -271,10 +269,9 @@ function parse_BrtShortSt(data) {
 	return [cell, value, 'str'];
 }
 function write_BrtShortSt(cell, ncell, o) {
-	var data = cell.v == null ? "" : String(cell.v);
-	if(o == null) o = new_buf(8 + 4 * data.length);
+	if(o == null) o = new_buf(8 + 4 * cell.v.length);
 	write_XLSBShortCell(ncell, o);
-	write_XLWideString(data, o);
+	write_XLWideString(cell.v, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }

@ -511,7 +508,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 	var opts = _opts || {};
 	if(!rels) rels = {'!id':{}};
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
-	var s/*:Worksheet*/ = ({}); if(opts.dense) s["!data"] = [];
+	var s/*:Worksheet*/ = (opts.dense ? [] : {});

 	var ref;
 	var refguess = {s: {r:2000000, c:2000000}, e: {r:0, c:0} };
@ -587,7 +584,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				}
 				if((cf = styles.CellXf[val[0].iStyleRef])) safe_format(p,cf.numFmtId,null,opts, themes, styles);
 				C = val[0].c == -1 ? C + 1 : val[0].c;
-				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][R][C] = p; }
+				if(opts.dense) { if(!s[R]) s[R] = []; s[R][C] = p; }
 				else s[encode_col(C) + rr] = p;
 				if(opts.cellFormula) {
 					af = false;
@ -620,7 +617,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				if(!opts.sheetStubs || pass) break;
 				p = ({t:'z',v:void 0}/*:any*/);
 				C = val[0].c == -1 ? C + 1 : val[0].c;
-				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][R][C] = p; }
+				if(opts.dense) { if(!s[R]) s[R] = []; s[R][C] = p; }
 				else s[encode_col(C) + rr] = p;
 				if(refguess.s.r > row.r) refguess.s.r = row.r;
 				if(refguess.s.c > C) refguess.s.c = C;
@ -651,11 +648,11 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 				}
 				for(R=val.rfx.s.r;R<=val.rfx.e.r;++R) for(C=val.rfx.s.c;C<=val.rfx.e.c;++C) {
 					if(opts.dense) {
-						if(!s["!data"][R]) s["!data"][R] = [];
-						if(!s["!data"][R][C]) s["!data"][R][C] = {t:'z',v:undefined};
-						s["!data"][R][C].l = val;
+						if(!s[R]) s[R] = [];
+						if(!s[R][C]) s[R][C] = {t:'z',v:undefined};
+						s[R][C].l = val;
 					} else {
-						addr = encode_col(C) + encode_row(R);
+						addr = encode_cell({c:C,r:R});
 						if(!s[addr]) s[addr] = {t:'z',v:undefined};
 						s[addr].l = val;
 					}
@ -665,14 +662,14 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 			case 0x01AA: /* 'BrtArrFmla' */
 				if(!opts.cellFormula) break;
 				arrayf.push(val);
-				cell = ((opts.dense ? s["!data"][R][C] : s[encode_col(C) + rr])/*:any*/);
+				cell = ((opts.dense ? s[R][C] : s[encode_col(C) + rr])/*:any*/);
 				cell.f = stringify_formula(val[1], refguess, {r:row.r, c:C}, supbooks, opts);
 				cell.F = encode_range(val[0]);
 				break;
 			case 0x01AB: /* 'BrtShrFmla' */
 				if(!opts.cellFormula) break;
 				sharedf[encode_cell(val[0].s)] = val[1];
-				cell = (opts.dense ? s["!data"][R][C] : s[encode_col(C) + rr]);
+				cell = (opts.dense ? s[R][C] : s[encode_col(C) + rr]);
 				cell.f = stringify_formula(val[1], refguess, {r:row.r, c:C}, supbooks, opts);
 				break;

@ -827,7 +824,7 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 	switch(cell.t) {
 		case 's': case 'str':
 			if(opts.bookSST) {
-				vv = get_sst_id(opts.Strings, (cell.v == null ? "" : String(cell.v)/*:any*/), opts.revStrings);
+				vv = get_sst_id(opts.Strings, (cell.v/*:any*/), opts.revStrings);
 				o.t = "s"; o.v = vv;
 				if(last_seen) write_record(ba, 0x0012 /* BrtShortIsst */, write_BrtShortIsst(cell, o));
 				else write_record(ba, 0x0007 /* BrtCellIsst */, write_BrtCellIsst(cell, o));
@ -842,12 +839,6 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 			if(cell.v == (cell.v | 0) && cell.v > -1000 && cell.v < 1000) {
 				if(last_seen) write_record(ba, 0x000D /* BrtShortRk */, write_BrtShortRk(cell, o));
 				else write_record(ba, 0x0002 /* BrtCellRk */, write_BrtCellRk(cell, o));
-			} else if(isNaN(cell.v)) {
-				if(last_seen) write_record(ba, 0x000E /* BrtShortError */, write_BrtShortError({t:"e", v: 0x24}, o)); // #NUM!
-				else write_record(ba, 0x0003 /* BrtCellError */, write_BrtCellError({t:"e", v: 0x24}, o)); // #NUM!
-			} else if(!isFinite(cell.v)) {
-				if(last_seen) write_record(ba, 0x000E /* BrtShortError */, write_BrtShortError({t:"e", v: 0x07}, o)); // #DIV/0!
-				else write_record(ba, 0x0003 /* BrtCellError */, write_BrtCellError({t:"e", v: 0x07}, o)); // #DIV/0!
 			} else {
 				if(last_seen) write_record(ba, 0x0010 /* BrtShortReal */, write_BrtShortReal(cell, o));
 				else write_record(ba, 0x0005 /* BrtCellReal */, write_BrtCellReal(cell, o));
@ -871,7 +862,7 @@ function write_ws_bin_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:num
 function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Workbook*/) {
 	var range = safe_decode_range(ws['!ref'] || "A1"), ref, rr = "", cols/*:Array<string>*/ = [];
 	write_record(ba, 0x0091 /* BrtBeginSheetData */);
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var cap = range.e.r;
 	if(ws['!rows']) cap = Math.max(range.e.r, ws['!rows'].length - 1);
 	for(var R = range.s.r; R <= cap; ++R) {
@ -884,7 +875,7 @@ function write_CELLTABLE(ba, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Work
 			/* *16384CELL */
 			if(R === range.s.r) cols[C] = encode_col(C);
 			ref = cols[C] + rr;
-			var cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) { last_seen = false; continue; }
 			/* write cell */
 			last_seen = write_ws_bin_cell(ba, cell, R, C, opts, ws, last_seen);
--- a/bits/69_chartxml.js
+++ b/bits/69_chartxml.js
@ -34,10 +34,7 @@ function parse_chart(data/*:?string*/, name/*:string*/, opts, rels, wb, csheet)
 		refguess.e.c = C;
 		col = encode_col(C);
 		cache[0].forEach(function(n,i) {
-			if(cs["!data"]) {
-				if(!cs["!data"][i]) cs["!data"][i] = [];
-				cs["!data"][i][C] = {t:'n', v:n, z:cache[1] };
-			} else cs[col + encode_row(i)] = {t:'n', v:n, z:cache[1] };
+			cs[col + encode_row(i)] = {t:'n', v:n, z:cache[1] };
 			R = i;
 		});
 		if(refguess.e.r < R) refguess.e.r = R;
--- a/bits/71_wbcommon.js
+++ b/bits/71_wbcommon.js
@ -115,17 +115,14 @@ function safe1904(wb/*:Workbook*/)/*:string*/ {

 var badchars = /*#__PURE__*/":][*?\/\\".split("");
 function check_ws_name(n/*:string*/, safe/*:?boolean*/)/*:boolean*/ {
-	try {
-		if(n == "") throw new Error("Sheet name cannot be blank");
-		if(n.length > 31) throw new Error("Sheet name cannot exceed 31 chars");
-		if(n.charCodeAt(0) == 0x27 || n.charCodeAt(n.length - 1) == 0x27) throw new Error("Sheet name cannot start or end with apostrophe (')");
-		if(n.toLowerCase() == "history") throw new Error("Sheet name cannot be 'History'");
-		badchars.forEach(function(c) {
-			if(n.indexOf(c) == -1) return;
-			throw new Error("Sheet name cannot contain : \\ / ? * [ ]");
-		});
-	} catch(e) { if(safe) return false; throw e; }
-	return true;
+	if(n.length > 31) { if(safe) return false; throw new Error("Sheet names cannot exceed 31 chars"); }
+	var _good = true;
+	badchars.forEach(function(c) {
+		if(n.indexOf(c) == -1) return;
+		if(!safe) throw new Error("Sheet name cannot contain : \\ / ? * [ ]");
+		_good = false;
+	});
+	return _good;
 }
 function check_wb_names(N, S, codes) {
 	N.forEach(function(n,i) {
--- a/bits/75_xlml.js
+++ b/bits/75_xlml.js
@ -207,7 +207,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 	var Rn;
 	var state = [], tmp;
 	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
-	var sheets = {}, sheetnames/*:Array<string>*/ = [], cursheet/*:Worksheet*/ = ({}), sheetname = ""; if(opts.dense) cursheet["!data"] = [];
+	var sheets = {}, sheetnames/*:Array<string>*/ = [], cursheet/*:Worksheet*/ = (opts.dense ? [] : {}), sheetname = "";
 	var cell = ({}/*:any*/), row = {};// eslint-disable-line no-unused-vars
 	var dtag = xlml_parsexmltag('<Data ss:Type="String">'), didx = 0;
 	var c = 0, r = 0;
@ -240,8 +240,8 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				if(comments.length > 0) cell.c = comments;
 				if((!opts.sheetRows || opts.sheetRows > r) && cell.v !== void 0) {
 					if(opts.dense) {
-						if(!cursheet["!data"][r]) cursheet["!data"][r] = [];
-						cursheet["!data"][r][c] = cell;
+						if(!cursheet[r]) cursheet[r] = [];
+						cursheet[r][c] = cell;
 					} else cursheet[encode_col(c) + encode_row(r)] = cell;
 				}
 				if(cell.HRef) {
@ -261,8 +261,8 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 						for(var cmd = r; cmd <= rr; ++cmd) {
 							if(cma > c || cmd > r) {
 								if(opts.dense) {
-									if(!cursheet["!data"][cmd]) cursheet["!data"][cmd] = [];
-									cursheet["!data"][cmd][cma] = {t:'z'};
+									if(!cursheet[cmd]) cursheet[cmd] = [];
+									cursheet[cmd][cma] = {t:'z'};
 								} else cursheet[encode_col(cma) + encode_row(cmd)] = {t:'z'};
 							}
 						}
@ -321,7 +321,7 @@ function parse_xlml_xml(d, _opts)/*:Workbook*/ {
 				state.push([Rn[3], false]);
 				tmp = xlml_parsexmltag(Rn[0]);
 				sheetname = unescapexml(tmp.Name);
-				cursheet = ({}); if(opts.dense) cursheet["!data"] = [];
+				cursheet = (opts.dense ? [] : {});
 				merges = [];
 				arrayf = [];
 				rowinfo = [];
@ -1177,7 +1177,7 @@ function write_ws_xlml_table(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbo
 		if(n.hidden) k['ss:Hidden']="1";
 		o.push(writextag("Column",null,k));
 	});
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	for(var R = range.s.r; R <= range.e.r; ++R) {
 		var row = [write_ws_xlml_row(R, (ws['!rows']||[])[R])];
 		for(var C = range.s.c; C <= range.e.c; ++C) {
@ -1192,7 +1192,7 @@ function write_ws_xlml_table(ws/*:Worksheet*/, opts, idx/*:number*/, wb/*:Workbo
 			}
 			if(skip) continue;
 			var addr = {r:R,c:C};
-			var ref = encode_col(C) + encode_row(R), cell = dense ? (ws["!data"][R]||[])[C] : ws[ref];
+			var ref = encode_cell(addr), cell = dense ? (ws[R]||[])[C] : ws[ref];
 			row.push(write_ws_xlml_cell(cell, ref, ws, opts, idx, wb, addr));
 		}
 		row.push("</Row>");
--- a/bits/76_xls.js
+++ b/bits/76_xls.js
@ -104,7 +104,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 	var wb = ({opts:{}}/*:any*/);
 	var Sheets = {};
 	if(DENSE != null && options.dense == null) options.dense = DENSE;
-	var out/*:Worksheet*/ = ({}/*:any*/); if(options.dense) out["!data"] = [];
+	var out/*:Worksheet*/ = ((options.dense ? [] : {})/*:any*/);
 	var Directory = {};
 	var range/*:Range*/ = ({}/*:any*/);
 	var last_formula = null;
@ -157,8 +157,8 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 		}
 		{
 			if(options.dense) {
-				if(!out["!data"][cell.r]) out["!data"][cell.r] = [];
-				out["!data"][cell.r][cell.c] = line;
+				if(!out[cell.r]) out[cell.r] = [];
+				out[cell.r][cell.c] = line;
 			} else out[last_cell] = line;
 		}
 	};
@ -324,7 +324,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						Workbook.Sheets.push(wsprops);
 					}
 					if(cur_sheet === "") Preamble = out; else Sheets[cur_sheet] = out;
-					out = ({}/*:any*/); if(options.dense) out["!data"] = [];
+					out = ((options.dense ? [] : {})/*:any*/);
 				} break;
 				case 0x0009: case 0x0209: case 0x0409: case 0x0809 /* BOF */: {
 					if(opts.biff === 8) opts.biff = {
@ -344,7 +344,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					if(val.BIFFVer == 0 && val.dt == 0x1000) { opts.biff = 5; seen_codepage = true; set_cp(opts.codepage = 28591); }
 					if(opts.biff == 8 && val.BIFFVer == 0 && val.dt == 16) opts.biff = 2;
 					if(file_depth++) break;
-					out = ({}/*:any*/); if(options.dense) out["!data"] = [];
+					out = ((options.dense ? [] : {})/*:any*/);

 					if(opts.biff < 8 && !seen_codepage) { seen_codepage = true; set_cp(opts.codepage = options.codepage || 1252); }

@ -367,7 +367,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 					wsprops = {Hidden:(Directory[s]||{hs:0}).hs, name:cur_sheet };
 				} break;
 				case 0x0203 /* Number */: case 0x0003 /* BIFF2NUM */: case 0x0002 /* BIFF2INT */: {
-					if(out["!type"] == "chart") if(options.dense ? (out["!data"][val.r]||[])[val.c]: out[encode_col(val.c) + encode_row(val.r)]) ++val.c;
+					if(out["!type"] == "chart") if(options.dense ? (out[val.r]||[])[val.c]: out[encode_cell({c:val.c, r:val.r})]) ++val.c;
 					temp_val = ({ixfe: val.ixfe, XF: XFs[val.ixfe]||{}, v:val.val, t:'n'}/*:any*/);
 					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
 					safe_format_xf(temp_val, options, wb.opts.Date1904);
@ -404,7 +404,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 							var _fr = _f[0][0][1][0], _fc = _f[0][0][1][1];
 							var _fe = encode_cell({r:_fr, c:_fc});
 							if(sharedf[_fe]) temp_val.f = ""+stringify_formula(val.formula,range,val.cell,supbooks, opts);
-							else temp_val.F = ((options.dense ? (out["!data"][_fr]||[])[_fc]: out[_fe]) || {}).F;
+							else temp_val.F = ((options.dense ? (out[_fr]||[])[_fc]: out[_fe]) || {}).F;
 						} else temp_val.f = ""+stringify_formula(val.formula,range,val.cell,supbooks, opts);
 					}
 					if(BIFF2Fmt > 0) temp_val.z = BIFF2FmtTable[(temp_val.ixfe>>8) & 0x3F];
@ -429,7 +429,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x0021: case 0x0221 /* Array */: {
 					arrayf.push(val);
 					var _arraystart = encode_cell(val[0].s);
-					cc = options.dense ? (out["!data"][val[0].s.r]||[])[val[0].s.c] : out[_arraystart];
+					cc = options.dense ? (out[val[0].s.r]||[])[val[0].s.c] : out[_arraystart];
 					if(options.cellFormula && cc) {
 						if(!last_formula) break; /* technically unreachable */
 						if(!_arraystart || !cc) break;
@ -443,7 +443,7 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 						/* TODO: capture range */
 						if(!last_formula) break; /* technically unreachable */
 						sharedf[encode_cell(last_formula.cell)]= val[0];
-						cc = options.dense ? (out["!data"][last_formula.cell.r]||[])[last_formula.cell.c] : out[encode_cell(last_formula.cell)];
+						cc = options.dense ? (out[last_formula.cell.r]||[])[last_formula.cell.c] : out[encode_cell(last_formula.cell)];
 						(cc||{}).f = ""+stringify_formula(val[0], range, lastcell, supbooks, opts);
 					}
 				} break;
@ -508,25 +508,25 @@ function parse_workbook(blob, options/*:ParseOpts*/)/*:Workbook*/ {
 				case 0x01b8 /* HLink */: {
 					for(rngR = val[0].s.r; rngR <= val[0].e.r; ++rngR)
 						for(rngC = val[0].s.c; rngC <= val[0].e.c; ++rngC) {
-							cc = options.dense ? (out["!data"][rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
 							if(cc) cc.l = val[1];
 						}
 				} break;
 				case 0x0800 /* HLinkTooltip */: {
 					for(rngR = val[0].s.r; rngR <= val[0].e.r; ++rngR)
 						for(rngC = val[0].s.c; rngC <= val[0].e.c; ++rngC) {
-							cc = options.dense ? (out["!data"][rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
 							if(cc && cc.l) cc.l.Tooltip = val[1];
 							}
 				} break;
 				case 0x001c /* Note */: {
 					if(opts.biff <= 5 && opts.biff >= 2) break; /* TODO: BIFF5 */
-					cc = options.dense ? (out["!data"][val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
+					cc = options.dense ? (out[val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
 					var noteobj = objects[val[2]];
 					if(!cc) {
 						if(options.dense) {
-							if(!out["!data"][val[0].r]) out["!data"][val[0].r] = [];
-							cc = out["!data"][val[0].r][val[0].c] = ({t:"z"}/*:any*/);
+							if(!out[val[0].r]) out[val[0].r] = [];
+							cc = out[val[0].r][val[0].c] = ({t:"z"}/*:any*/);
 						} else {
 							cc = out[encode_cell(val[0])] = ({t:"z"}/*:any*/);
 						}
--- a/bits/78_writebiff.js
+++ b/bits/78_writebiff.js
@ -62,37 +62,33 @@ function write_ws_biff2_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:n
 			var v = cell.t == 'd' ? datenum(parseDate(cell.v)) : cell.v;
 			if((v == (v|0)) && (v >= 0) && (v < 65536))
 				write_biff_rec(ba, 0x0002, write_BIFF2INT(R, C, v));
-			else if(isNaN(v))
-				write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, 0x24, "e")); // #NUM!
-			else if(!isFinite(v))
-				write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, 0x07, "e")); // #DIV/0!
 			else
 				write_biff_rec(ba, 0x0003, write_BIFF2NUM(R,C, v));
 			return;
 		case 'b': case 'e': write_biff_rec(ba, 0x0005, write_BIFF2BERR(R, C, cell.v, cell.t)); return;
 		/* TODO: codepage, sst */
 		case 's': case 'str':
-			write_biff_rec(ba, 0x0004, write_BIFF2LABEL(R, C, cell.v == null ? "" : String(cell.v).slice(0,255)));
+			write_biff_rec(ba, 0x0004, write_BIFF2LABEL(R, C, (cell.v||"").slice(0,255)));
 			return;
 	}
 	write_biff_rec(ba, 0x0001, write_BIFF2Cell(null, R, C));
 }

 function write_ws_biff2(ba/*:BufArray*/, ws/*:Worksheet*/, idx/*:number*/, opts/*::, wb:Workbook*/) {
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var range = safe_decode_range(ws['!ref'] || "A1"), ref/*:string*/, rr = "", cols/*:Array<string>*/ = [];
 	if(range.e.c > 0xFF || range.e.r > 0x3FFF) {
 		if(opts.WTF) throw new Error("Range " + (ws['!ref'] || "A1") + " exceeds format limit A1:IV16384");
 		range.e.c = Math.min(range.e.c, 0xFF);
 		range.e.r = Math.min(range.e.c, 0x3FFF);
+		ref = encode_range(range);
 	}
-	var row = [];
-	for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 	for(var R = range.s.r; R <= range.e.r; ++R) {
-		if(dense) row = ws["!data"][R] || [];
 		rr = encode_row(R);
-		for(C = range.s.c; C <= range.e.c; ++C) {
-			var cell = dense ? row[C] : ws[cols[C] + rr];
+		for(var C = range.s.c; C <= range.e.c; ++C) {
+			if(R === range.s.r) cols[C] = encode_col(C);
+			ref = cols[C] + rr;
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) continue;
 			/* write cell */
 			write_ws_biff2_cell(ba, cell, R, C, opts);
@ -103,6 +99,7 @@ function write_ws_biff2(ba/*:BufArray*/, ws/*:Worksheet*/, idx/*:number*/, opts/
 /* Based on test files */
 function write_biff2_buf(wb/*:Workbook*/, opts/*:WriteOpts*/) {
 	var o = opts || {};
+	if(DENSE != null && o.dense == null) o.dense = DENSE;
 	var ba = buf_array();
 	var idx = 0;
 	for(var i=0;i<wb.SheetNames.length;++i) if(wb.SheetNames[i] == o.sheet) idx=i;
@ -186,10 +183,8 @@ function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:n
 	else switch(cell.t) {
 		case 'd': case 'n':
 			var v = cell.t == 'd' ? datenum(parseDate(cell.v)) : cell.v;
-			if(isNaN(v)) write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, 0x24, os, opts, "e")); // #NUM!
-			else if(!isFinite(v)) write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, 0x07, os, opts, "e")); // #DIV/0!
 			/* TODO: emit RK as appropriate */
-			else write_biff_rec(ba, 0x0203 /* Number */, write_Number(R, C, v, os, opts));
+			write_biff_rec(ba, 0x0203 /* Number */, write_Number(R, C, v, os, opts));
 			break;
 		case 'b': case 'e':
 			write_biff_rec(ba, 0x0205 /* BoolErr */, write_BoolErr(R, C, cell.v, os, opts, cell.t));
@ -197,9 +192,9 @@ function write_ws_biff8_cell(ba/*:BufArray*/, cell/*:Cell*/, R/*:number*/, C/*:n
 		/* TODO: codepage, sst */
 		case 's': case 'str':
 			if(opts.bookSST) {
-				var isst = get_sst_id(opts.Strings, cell.v == null ? "" : String(cell.v), opts.revStrings);
+				var isst = get_sst_id(opts.Strings, cell.v, opts.revStrings);
 				write_biff_rec(ba, 0x00fd /* LabelSst */, write_LabelSst(R, C, isst, os, opts));
-			} else write_biff_rec(ba, 0x0204 /* Label */, write_Label(R, C, (cell.v == null ? "" : String(cell.v)).slice(0,255), os, opts));
+			} else write_biff_rec(ba, 0x0204 /* Label */, write_Label(R, C, (cell.v||"").slice(0,255), os, opts));
 			break;
 		default:
 			write_biff_rec(ba, 0x0201 /* Blank */, write_XLSCell(R, C, os));
@ -212,7 +207,7 @@ function write_ws_biff8(idx/*:number*/, opts, wb/*:Workbook*/) {
 	var s = wb.SheetNames[idx], ws = wb.Sheets[s] || {};
 	var _WB/*:WBWBProps*/ = ((wb||{}).Workbook||{}/*:any*/);
 	var _sheet/*:WBWSProp*/ = ((_WB.Sheets||[])[idx]||{}/*:any*/);
-	var dense = ws["!data"] != null;
+	var dense = Array.isArray(ws);
 	var b8 = opts.biff == 8;
 	var ref/*:string*/, rr = "", cols/*:Array<string>*/ = [];
 	var range = safe_decode_range(ws['!ref'] || "A1");
@ -248,14 +243,12 @@ function write_ws_biff8(idx/*:number*/, opts, wb/*:Workbook*/) {

 	if(b8) ws['!links'] = [];
 	var comments = [];
-	var row = [];
-	for(var C = range.s.c; C <= range.e.c; ++C) cols[C] = encode_col(C);
 	for(var R = range.s.r; R <= range.e.r; ++R) {
-		if(dense) row = ws["!data"][R] || [];
 		rr = encode_row(R);
-		for(C = range.s.c; C <= range.e.c; ++C) {
+		for(var C = range.s.c; C <= range.e.c; ++C) {
+			if(R === range.s.r) cols[C] = encode_col(C);
 			ref = cols[C] + rr;
-			var cell = dense ? row[C] : ws[ref];
+			var cell = dense ? (ws[R]||[])[C] : ws[ref];
 			if(!cell) continue;
 			/* write cell */
 			write_ws_biff8_cell(ba, cell, R, C, opts);
--- a/bits/79_html.js
+++ b/bits/79_html.js
@ -1,8 +1,8 @@
 /* note: browser DOM element cannot see mso- style attrs, must parse */
 function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
 	var opts = _opts || {};
-	var dense = (opts.dense != null) ? opts.dense : DENSE;
-	var ws/*:Worksheet*/ = ({}/*:any*/); if(dense) ws["!data"] = [];
+	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
+	var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 	str = str.replace(/<!--.*?-->/g, "");
 	var mtch/*:any*/ = str.match(/<table/i);
 	if(!mtch) throw new Error("Invalid HTML: could not find <table>");
@ -48,7 +48,7 @@ function html_to_sheet(str/*:string*/, _opts)/*:Workbook*/ {
 				if(!opts.cellDates) o = ({t:'n', v:datenum(o.v)}/*:any*/);
 				o.z = opts.dateNF || table_fmt[14];
 			}
-			if(dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = o; }
+			if(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = o; }
 			else ws[encode_cell({r:R, c:C})] = o;
 			C += CS;
 		}
@ -61,7 +61,6 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 	var M/*:Array<Range>*/ = (ws['!merges'] ||[]);
 	var oo/*:Array<string>*/ = [];
 	var sp = ({}/*:any*/);
-	var dense = ws["!data"] != null;
 	for(var C = r.s.c; C <= r.e.c; ++C) {
 		var RS = 0, CS = 0;
 		for(var j = 0; j < M.length; ++j) {
@ -71,8 +70,8 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 			RS = M[j].e.r - M[j].s.r + 1; CS = M[j].e.c - M[j].s.c + 1; break;
 		}
 		if(RS < 0) continue;
-		var coord = encode_col(C) + encode_row(R);
-		var cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
+		var coord = encode_cell({r:R,c:C});
+		var cell = o.dense ? (ws[R]||[])[C] : ws[coord];
 		/* TODO: html entities */
 		var w = (cell && cell.v != null) && (cell.h || escapehtml(cell.w || (format_cell(cell), cell.w) || "")) || "";
 		sp = ({}/*:any*/);
@ -83,7 +82,7 @@ function make_html_row(ws/*:Worksheet*/, r/*:Range*/, R/*:number*/, o/*:Sheet2HT
 			sp["data-t"] = cell && cell.t || 'z';
 			if(cell.v != null) sp["data-v"] = cell.v;
 			if(cell.z != null) sp["data-z"] = cell.z;
-			if(cell.l && (cell.l.Target || "#").charAt(0) != "#") w = '<a href="' + escapehtml(cell.l.Target) +'">' + w + '</a>';
+			if(cell.l && (cell.l.Target || "#").charAt(0) != "#") w = '<a href="' + cell.l.Target +'">' + w + '</a>';
 		}
 		sp.id = (o.id || "sjs") + "-" + coord;
 		oo.push(writextag('td', w, sp));
@ -120,6 +119,7 @@ function sheet_to_html(ws/*:Worksheet*/, opts/*:?Sheet2HTMLOpts*//*, wb:?Workboo
 	var footer = o.footer != null ? o.footer : HTML_END;
 	var out/*:Array<string>*/ = [header];
 	var r = decode_range(ws['!ref']);
+	o.dense = Array.isArray(ws);
 	out.push(make_html_preamble(ws, r, o));
 	for(var R = r.s.r; R <= r.e.r; ++R) out.push(make_html_row(ws, r, R, o));
 	out.push("</table>" + footer);
@ -134,7 +134,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 	}

 	var opts = _opts || {};
-	var dense = ws["!data"] != null;
+	if(DENSE != null) opts.dense = DENSE;
 	var or_R = 0, or_C = 0;
 	if(opts.origin != null) {
 		if(typeof opts.origin == 'number') or_R = opts.origin;
@ -199,7 +199,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 				l = Aelts[Aelti].getAttribute("href"); if(l.charAt(0) != "#") break;
 			}
 			if(l && l.charAt(0) != "#" &&	l.slice(0, 11).toLowerCase() != 'javascript:') o.l = ({ Target: l });
-			if(dense) { if(!ws["!data"][R + or_R]) ws["!data"][R + or_R] = []; ws["!data"][R + or_R][C + or_C] = o; }
+			if(opts.dense) { if(!ws[R + or_R]) ws[R + or_R] = []; ws[R + or_R][C + or_C] = o; }
 			else ws[encode_cell({c:C + or_C, r:R + or_R})] = o;
 			if(range.e.c < C + or_C) range.e.c = C + or_C;
 			C += CS;
@ -215,7 +215,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/

 function parse_dom_table(table/*:HTMLElement*/, _opts/*:?any*/)/*:Worksheet*/ {
 	var opts = _opts || {};
-	var ws/*:Worksheet*/ = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
+	var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 	return sheet_add_dom(ws, table, _opts);
 }

--- a/bits/80_parseods.js
+++ b/bits/80_parseods.js
@ -245,7 +245,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 		var sheetag/*:: = {name:"", '名称':""}*/;
 		var rowtag/*:: = {'行号':""}*/;
 		var Sheets = {}, SheetNames/*:Array<string>*/ = [];
-		var ws = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
+		var ws = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
 		var Rn, q/*:: :any = ({t:"", v:null, z:null, w:"",c:[],}:any)*/;
 		var ctag = ({value:""}/*:any*/);
 		var textp = "", textpidx = 0, textptag/*:: = {}*/;
@ -289,7 +289,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					sheetag = parsexmltag(Rn[0], false);
 					R = C = -1;
 					range.s.r = range.s.c = 10000000; range.e.r = range.e.c = 0;
-					ws = ({}/*:any*/); if(opts.dense) ws["!data"] = []; merges = [];
+					ws = opts.dense ? ([]/*:any*/) : ({}/*:any*/); merges = [];
 					rowinfo = [];
 					intable = true;
 				}
@ -309,7 +309,7 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 			case 'covered-table-cell': // 9.1.5 <table:covered-table-cell>
 				if(Rn[1] !== '/') ++C;
 				if(opts.sheetStubs) {
-					if(opts.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = {t:'z'}; }
+					if(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = {t:'z'}; }
 					else ws[encode_cell({r:R,c:C})] = {t:'z'};
 				}
 				textp = ""; textR = [];
@ -325,10 +325,10 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 					if((ctag['数据类型'] || ctag['value-type']) == "string") {
 						q.t = "s"; q.v = unescapexml(ctag['string-value'] || "");
 						if(opts.dense) {
-							if(!ws["!data"][R]) ws["!data"][R] = [];
-							ws["!data"][R][C] = q;
+							if(!ws[R]) ws[R] = [];
+							ws[R][C] = q;
 						} else {
-							ws[encode_col(C) + encode_row(R)] = q;
+							ws[encode_cell({r:R,c:C})] = q;
 						}
 					}
 					C+= colpeat-1;
@ -405,9 +405,9 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 							for(var rpt = 0; rpt < rowpeat; ++rpt) {
 								colpeat = parseInt(ctag['number-columns-repeated']||"1", 10);
 								if(opts.dense) {
-									if(!ws["!data"][R + rpt]) ws["!data"][R + rpt] = [];
-									ws["!data"][R + rpt][C] = rpt == 0 ? q : dup(q);
-									while(--colpeat > 0) ws["!data"][R + rpt][C + colpeat] = dup(q);
+									if(!ws[R + rpt]) ws[R + rpt] = [];
+									ws[R + rpt][C] = rpt == 0 ? q : dup(q);
+									while(--colpeat > 0) ws[R + rpt][C + colpeat] = dup(q);
 								} else {
 									ws[encode_cell({r:R + rpt,c:C})] = q;
 									while(--colpeat > 0) ws[encode_cell({r:R + rpt,c:C + colpeat})] = dup(q);
--- a/bits/81_writeods.js
+++ b/bits/81_writeods.js
@ -211,7 +211,7 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		o.push('      <table:table table:name="' + escapexml(wb.SheetNames[i]) + '" table:style-name="ta1">\n');
 		var R=0,C=0, range = decode_range(ws['!ref']||"A1");
 		var marr/*:Array<Range>*/ = ws['!merges'] || [], mi = 0;
-		var dense = ws["!data"] != null;
+		var dense = Array.isArray(ws);
 		if(ws["!cols"]) {
 			for(C = 0; C <= range.e.c; ++C) o.push('        <table:table-column' + (ws["!cols"][C] ? ' table:style-name="co' + ws["!cols"][C].ods + '"' : '') + '></table:table-column>\n');
 		}
@ -237,7 +237,7 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 					break;
 				}
 				if(skip) { o.push(covered_cell_xml); continue; }
-				var ref = encode_cell({r:R, c:C}), cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
+				var ref = encode_cell({r:R, c:C}), cell = dense ? (ws[R]||[])[C]: ws[ref];
 				if(cell && cell.f) {
 					ct['table:formula'] = escapexml(csf_to_ods_formula(cell.f));
 					if(cell.F) {
@ -347,10 +347,9 @@ var write_content_ods/*:{(wb:any, opts:any):string}*/ = /* @__PURE__ */(function
 		var nfi = 69;
 		wb.SheetNames.map(function(n) { return wb.Sheets[n]; }).forEach(function(ws) {
 			if(!ws) return;
-			var dense = (ws["!data"] != null);
 			var range = decode_range(ws["!ref"]);
 			for(var R = 0; R <= range.e.r; ++R) for(var C = 0; C <= range.e.c; ++C) {
-				var c = dense ? (ws["!data"][R]||[])[C] : ws[encode_cell({r:R,c:C})];
+				var c = Array.isArray(ws) ? (ws[R]||[])[C] : ws[encode_cell({r:R,c:C})];
 				if(!c || !c.z || c.z.toLowerCase() == "general") continue;
 				if(!nfs[c.z]) {
 					var out = write_number_format_ods(c.z, "N" + nfi);
--- a/bits/83_numbers.js
+++ b/bits/83_numbers.js
--- a/bits/85_parsezip.js
+++ b/bits/85_parsezip.js
@ -36,12 +36,12 @@ function safe_parse_sheet(zip, path/*:string*/, relsPath/*:string*/, sheet, idx/
 		sheets[sheet] = _ws;

 		/* scan rels for comments and threaded comments */
-		var comments = [], tcomments = [];
+		var tcomments = [];
 		if(sheetRels && sheetRels[sheet]) keys(sheetRels[sheet]).forEach(function(n) {
 			var dfile = "";
 			if(sheetRels[sheet][n].Type == RELS.CMNT) {
 				dfile = resolve_path(sheetRels[sheet][n].Target, path);
-				comments = parse_cmnt(getzipdata(zip, dfile, true), dfile, opts);
+				var comments = parse_cmnt(getzipdata(zip, dfile, true), dfile, opts);
 				if(!comments || !comments.length) return;
 				sheet_insert_comments(_ws, comments, false);
 			}
--- a/bits/86_writezip.js
+++ b/bits/86_writezip.js
@ -101,8 +101,7 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	/* TODO: something more intelligent with themes */

 	f = "xl/theme/theme1.xml";
-	var ww = write_theme(wb.Themes, opts);
-	zip_add_file(zip, f, ww);
+	zip_add_file(zip, f, write_theme(wb.Themes, opts));
 	ct.themes.push(f);
 	add_rels(opts.wbrels, -1, "theme/theme1.xml", RELS.THEME);

--- a/bits/87_read.js
+++ b/bits/87_read.js
@ -50,13 +50,7 @@ function read_plaintext_raw(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
 function read_utf16(data/*:RawData*/, o/*:ParseOpts*/)/*:Workbook*/ {
 	var d = data;
 	if(o.type == 'base64') d = Base64_decode(d);
-	if(typeof ArrayBuffer !== "undefined" && data instanceof ArrayBuffer) d = new Uint8Array(data);
-	d = typeof $cptable !== "undefined" ? $cptable.utils.decode(1200, d.slice(2), 'str') : (
-		(has_buf && Buffer.isBuffer(data)) ? data.slice(2).toString("utf16le") :
-		(typeof Uint8Array !== "undefined" && d instanceof Uint8Array) ? (
-			typeof TextDecoder !== "undefined" ? new TextDecoder("utf-16le").decode(d.slice(2)) : utf16lereadu(d.slice(2))
-		) : utf16leread(d.slice(2))
-	);
+	d = typeof $cptable !== "undefined" ? $cptable.utils.decode(1200, d.slice(2), 'str') : utf16leread(d.slice(2));
 	o.type = "binary";
 	return read_plaintext(d, o);
 }
--- a/bits/90_utils.js
+++ b/bits/90_utils.js
@ -4,17 +4,17 @@ type MJRObject = {
 	isempty: boolean;
 };
 */
-function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, header/*:number*/, hdr/*:Array<any>*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
+function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, header/*:number*/, hdr/*:Array<any>*/, dense/*:boolean*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
 	var rr = encode_row(R);
 	var defval = o.defval, raw = o.raw || !Object.prototype.hasOwnProperty.call(o, "raw");
-	var isempty = true, dense = (sheet["!data"] != null);
+	var isempty = true;
 	var row/*:any*/ = (header === 1) ? [] : {};
 	if(header !== 1) {
 		if(Object.defineProperty) try { Object.defineProperty(row, '__rowNum__', {value:R, enumerable:false}); } catch(e) { row.__rowNum__ = R; }
 		else row.__rowNum__ = R;
 	}
-	if(!dense || sheet["!data"][R]) for (var C = r.s.c; C <= r.e.c; ++C) {
-		var val = dense ? (sheet["!data"][R]||[])[C] : sheet[cols[C] + rr];
+	if(!dense || sheet[R]) for (var C = r.s.c; C <= r.e.c; ++C) {
+		var val = dense ? sheet[R][C] : sheet[cols[C] + rr];
 		if(val === undefined || val.t === undefined) {
 			if(defval === undefined) continue;
 			if(hdr[C] != null) { row[hdr[C]] = defval; }
@ -63,16 +63,16 @@ function sheet_to_json(sheet/*:Worksheet*/, opts/*:?Sheet2JSONOpts*/) {
 	var cols/*:Array<string>*/ = [];
 	var out/*:Array<any>*/ = [];
 	var outi = 0, counter = 0;
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet["!data"][R]) sheet["!data"][R] = [];
+	if(dense && !sheet[R]) sheet[R] = [];
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(C = r.s.c; C <= r.e.c; ++C) {
 		if(((colinfo[C]||{}).hidden)) continue;
 		cols[C] = encode_col(C);
-		val = dense ? sheet["!data"][R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet[R][C] : sheet[cols[C] + rr];
 		switch(header) {
 			case 1: hdr[C] = C - r.s.c; break;
 			case 2: hdr[C] = cols[C]; break;
@ -91,7 +91,7 @@ function sheet_to_json(sheet/*:Worksheet*/, opts/*:?Sheet2JSONOpts*/) {
 	}
 	for (R = r.s.r + offset; R <= r.e.r; ++R) {
 		if ((rowinfo[R]||{}).hidden) continue;
-		var row = make_json_row(sheet, r, R, cols, header, hdr, o);
+		var row = make_json_row(sheet, r, R, cols, header, hdr, dense, o);
 		if((row.isempty === false) || (header === 1 ? o.blankrows !== false : !!o.blankrows)) out[outi++] = row.row;
 	}
 	out.length = outi;
@ -102,11 +102,9 @@ var qreg = /"/g;
 function make_csv_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, fs/*:number*/, rs/*:number*/, FS/*:string*/, o/*:Sheet2CSVOpts*/)/*:?string*/ {
 	var isempty = true;
 	var row/*:Array<string>*/ = [], txt = "", rr = encode_row(R);
-	var dense = sheet["!data"] != null;
-	var datarow = dense && sheet["!data"][R] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) {
 		if (!cols[C]) continue;
-		var val = dense ? datarow[C]: sheet[cols[C] + rr];
+		var val = o.dense ? (sheet[R]||[])[C]: sheet[cols[C] + rr];
 		if(val == null) txt = "";
 		else if(val.v != null) {
 			isempty = false;
@ -133,6 +131,7 @@ function sheet_to_csv(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/)/*:string*/ {
 	var RS = o.RS !== undefined ? o.RS : "\n", rs = RS.charCodeAt(0);
 	var endregex = new RegExp((FS=="|" ? "\\|" : FS)+"+$");
 	var row = "", cols/*:Array<string>*/ = [];
+	o.dense = Array.isArray(sheet);
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) if (!((colinfo[C]||{}).hidden)) cols[C] = encode_col(C);
@ -144,6 +143,7 @@ function sheet_to_csv(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/)/*:string*/ {
 		if(o.strip) row = row.replace(endregex,"");
 		if(row || (o.blankrows !== false)) out.push((w++ ? RS : "") + row);
 	}
+	delete o.dense;
 	return out.join("");
 }

@ -160,13 +160,13 @@ function sheet_to_formulae(sheet/*:Worksheet*/)/*:Array<string>*/ {
 	if(sheet == null || sheet["!ref"] == null) return [];
 	var r = safe_decode_range(sheet['!ref']), rr = "", cols/*:Array<string>*/ = [], C;
 	var cmds/*:Array<string>*/ = [];
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	for(C = r.s.c; C <= r.e.c; ++C) cols[C] = encode_col(C);
 	for(var R = r.s.r; R <= r.e.r; ++R) {
 		rr = encode_row(R);
 		for(C = r.s.c; C <= r.e.c; ++C) {
 			y = cols[C] + rr;
-			x = dense ? (sheet["!data"][R]||[])[C] : sheet[y];
+			x = dense ? (sheet[R]||[])[C] : sheet[y];
 			val = "";
 			if(x === undefined) continue;
 			else if(x.F != null) {
@ -191,11 +191,10 @@ function sheet_to_formulae(sheet/*:Worksheet*/)/*:Array<string>*/ {

 function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet*/ {
 	var o = opts || {};
-	var dense = _ws ? (_ws["!data"] != null) : o.dense;
+	var dense = _ws ? Array.isArray(_ws) : o.dense;
 	if(DENSE != null && dense == null) dense = DENSE;
 	var offset = +!o.skipHeader;
-	var ws/*:Worksheet*/ = _ws || ({});
-	if(!_ws && dense) ws["!data"] = [];
+	var ws/*:Worksheet*/ = _ws || (dense ? ([]/*:any*/) : ({}/*:any*/));
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -214,20 +213,19 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 		if(_R == -1) { _R = 0; range.e.r = js.length - 1 + offset; }
 	}
 	var hdr/*:Array<string>*/ = o.header || [], C = 0;
-	var ROW = [];
+
 	js.forEach(function (JS, R/*:number*/) {
-		if(dense && !ws["!data"][_R + R + offset]) ws["!data"][_R + R + offset] = [];
-		if(dense) ROW = ws["!data"][_R + R + offset];
+		if(!ws[_R + R + offset]) ws[_R + R + offset] = [];
+		var ROW = ws[_R + R + offset];
 		keys(JS).forEach(function(k) {
 			if((C=hdr.indexOf(k)) == -1) hdr[C=hdr.length] = k;
 			var v = JS[k];
 			var t = 'z';
 			var z = "";
-			var ref = dense ? "" : (encode_col(_C + C) + encode_row(_R + R + offset));
+			var ref = dense ? "" : encode_cell({c:_C + C,r:_R + R + offset});
 			var cell/*:Cell*/ = dense ? ROW[_C + C] : ws[ref];
 			if(v && typeof v === 'object' && !(v instanceof Date)){
-				if(dense) ROW[_C + C] = v;
-				else ws[ref] = v;
+				ws[ref] = v;
 			} else {
 				if(typeof v == 'number') t = 'n';
 				else if(typeof v == 'boolean') t = 'b';
@ -241,7 +239,8 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 				if(!cell) {
 					if(!dense) ws[ref] = cell = ({t:t, v:v}/*:any*/);
 					else ROW[_C + C] = cell = ({t:t, v:v}/*:any*/);
-				} else {
+				}
+				else {
 					cell.t = t; cell.v = v;
 					delete cell.w; delete cell.R;
 					if(z) cell.z = z;
@ -252,9 +251,9 @@ function sheet_add_json(_ws/*:?Worksheet*/, js/*:Array<any>*/, opts)/*:Worksheet
 	});
 	range.e.c = Math.max(range.e.c, _C + hdr.length - 1);
 	var __R = encode_row(_R);
-	if(dense && !ws["!data"][_R]) ws["!data"][_R] = [];
+	if(dense && !ws[_R]) ws[_R] = [];
 	if(offset) for(C = 0; C < hdr.length; ++C) {
-		if(dense) ws["!data"][_R][C + _C] = {t:'s', v:hdr[C]};
+		if(dense) ws[_R][C + _C] = {t:'s', v:hdr[C]};
 		else ws[encode_col(C + _C) + __R] = {t:'s', v:hdr[C]};
 	}
 	ws['!ref'] = encode_range(range);
@ -266,17 +265,18 @@ function json_to_sheet(js/*:Array<any>*/, opts)/*:Worksheet*/ { return sheet_add
 function ws_get_cell_stub(ws/*:Worksheet*/, R, C/*:?number*/)/*:Cell*/ {
 	/* A1 cell address */
 	if(typeof R == "string") {
-		if(ws["!data"] != null) {
+		/* dense */
+		if(Array.isArray(ws)) {
 			var RC = decode_cell(R);
-			if(!ws["!data"][RC.r]) ws["!data"][RC.r] = [];
-			return ws["!data"][RC.r][RC.c] || (ws["!data"][RC.r][RC.c] = {t:'z'});
+			if(!ws[RC.r]) ws[RC.r] = [];
+			return ws[RC.r][RC.c] || (ws[RC.r][RC.c] = {t:'z'});
 		}
 		return ws[R] || (ws[R] = {t:'z'});
 	}
 	/* cell address object */
 	if(typeof R != "number") return ws_get_cell_stub(ws, encode_cell(R));
 	/* R and C are 0-based indices */
-	return ws_get_cell_stub(ws, encode_col(C||0) + encode_row(R));
+	return ws_get_cell_stub(ws, encode_cell({r:R,c:C||0}));
 }

 /* find sheet index for given name / validate index */
--- a/bits/97_node.js
+++ b/bits/97_node.js
@ -10,6 +10,7 @@ function write_csv_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	var RS = o.RS !== undefined ? o.RS : "\n", rs = RS.charCodeAt(0);
 	var endregex = new RegExp((FS=="|" ? "\\|" : FS)+"+$");
 	var row/*:?string*/ = "", cols/*:Array<string>*/ = [];
+	o.dense = Array.isArray(sheet);
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<RowInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(var C = r.s.c; C <= r.e.c; ++C) if (!((colinfo[C]||{}).hidden)) cols[C] = encode_col(C);
@ -39,6 +40,7 @@ function write_html_stream(ws/*:Worksheet*/, opts/*:?Sheet2HTMLOpts*/) {
 	var footer = o.footer != null ? o.footer : HTML_END;
 	stream.push(header);
 	var r = decode_range(ws['!ref']);
+	o.dense = Array.isArray(ws);
 	stream.push(make_html_preamble(ws, r, o));
 	var R = r.s.r;
 	var end = false;
@ -76,16 +78,16 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	var rr = encode_row(r.s.r);
 	var cols/*:Array<string>*/ = [];
 	var counter = 0;
-	var dense = sheet["!data"] != null;
+	var dense = Array.isArray(sheet);
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet["!data"][R]) sheet["!data"][R] = [];
+	if(dense && !sheet[R]) sheet[R] = [];
 	var colinfo/*:Array<ColInfo>*/ = o.skipHidden && sheet["!cols"] || [];
 	var rowinfo/*:Array<RowInfo>*/ = o.skipHidden && sheet["!rows"] || [];
 	for(C = r.s.c; C <= r.e.c; ++C) {
 		if(((colinfo[C]||{}).hidden)) continue;
 		cols[C] = encode_col(C);
-		val = dense ? sheet["!data"][R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet[R][C] : sheet[cols[C] + rr];
 		switch(header) {
 			case 1: hdr[C] = C - r.s.c; break;
 			case 2: hdr[C] = cols[C]; break;
@ -106,7 +108,7 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	stream._read = function() {
 		while(R <= r.e.r) {
 			if ((rowinfo[R-1]||{}).hidden) continue;
-			var row = make_json_row(sheet, r, R, cols, header, hdr, o);
+			var row = make_json_row(sheet, r, R, cols, header, hdr, dense, o);
 			++R;
 			if((row.isempty === false) || (header === 1 ? o.blankrows !== false : !!o.blankrows)) {
 				stream.push(row.row);
--- a/bits/98_exports.js
+++ b/bits/98_exports.js
@ -10,8 +10,6 @@ XLSX.writeFileAsync = writeFileAsync;
 XLSX.utils = utils;
 XLSX.writeXLSX = writeSyncXLSX;
 XLSX.writeFileXLSX = writeFileSyncXLSX;
-XLSX.set_fs = set_fs;
-XLSX.set_cptable = set_cptable;
 XLSX.SSF = SSF;
 if(typeof __stream !== "undefined") XLSX.stream = __stream;
 if(typeof CFB !== "undefined") XLSX.CFB = CFB;
--- a/demos/vue/README.md
+++ b/demos/vue/README.md
@ -7,6 +7,6 @@ The ecosystem demos were grouped by type in the new demo site:

 - [Nuxt Content](https://docs.sheetjs.com/docs/demos/content#nuxtjs) is now part of "Content and Site Generation"
 - [The new iOS app demo](https://docs.sheetjs.com/docs/demos/mobile#quasar) uses the Quasar Framework in a VueJS + Vite project to generate a native iOS app.
- [`vue3-table-lite` reading, modifying, and writing files](https://docs.sheetjs.com/docs/demos/grid#vue3-table-lite) is now part of "Data Grids and UI"
+- [`vue3-table-lite` reading, modifying, and writing files](https://docs.sheetjs.com/docs/demo/grid#vue3-table-lite) is now part of "Data Grids and UI"

 [![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/dist/cpexcel.d.ts
+++ b/dist/cpexcel.d.ts
@ -1,39 +0,0 @@
-/* codepage.js (C) 2013-present SheetJS -- http://sheetjs.com */
-// TypeScript Version: 2.2
-
-/** Codepage index type (integer or string representation) */
-export type CP$Index = number | string;
-
-/* Individual codepage converter */
-export interface CP$Conv {
-	enc: {[n: string]: number; };
-	dec: {[n: number]: string; };
-}
-
-/** Encode input type (string, array of characters, Buffer) */
-export type CP$String = string | string[] | Uint8Array;
-
-/** Encode output / decode input type */
-export type CP$Data = string | number[] | Uint8Array;
-
-/** General utilities */
-export interface CP$Utils {
-	decode(cp: CP$Index, data: CP$Data): string;
-	encode(cp: CP$Index, data: CP$String, opts?: any): CP$Data;
-	hascp(n: number): boolean;
-	magic: {[cp: string]: string};
-}
-
-/* note: TS cannot export top-level indexer, hence default workaround */
-export interface CP$Module {
-	/** Version string */
-	version: string;
-
-	/** Utility Functions */
-	utils: CP$Utils;
-
-	/** Codepage Converters */
-	[cp: number]: CP$Conv;
-}
-export const cptable: CP$Module;
-export default cptable;
--- a/dist/xlsx.core.min.js
+++ b/dist/xlsx.core.min.js
--- a/dist/xlsx.core.min.map
+++ b/dist/xlsx.core.min.map
--- a/dist/xlsx.extendscript.js
+++ b/dist/xlsx.extendscript.js
--- a/dist/xlsx.full.min.js
+++ b/dist/xlsx.full.min.js
--- a/dist/xlsx.full.min.map
+++ b/dist/xlsx.full.min.map
--- a/dist/xlsx.mini.min.js
+++ b/dist/xlsx.mini.min.js
--- a/dist/xlsx.mini.min.map
+++ b/dist/xlsx.mini.min.map
--- a/dist/xlsx.zahl.js
+++ b/dist/xlsx.zahl.js
--- a/dist/xlsx.zahl.mjs
+++ b/dist/xlsx.zahl.mjs
--- a/dist/zahl.d.ts
+++ b/dist/zahl.d.ts
@ -1,4 +0,0 @@
-/* zahl.d.ts (C) 2022-present SheetJS */
-// TypeScript Version: 2.2
-declare const XLSX_ZAHL_PAYLOAD: string;
-export default XLSX_ZAHL_PAYLOAD;
--- a/formats.png
+++ b/formats.png
--- a/hotcross.mjs
+++ b/hotcross.mjs
@ -5,6 +5,13 @@ var it = function(m,cb){console.log(" ".repeat(pdizzle) + m); ++pdizzle; if(cb)
 it.skip = function(m,cb){};
 var before = function(cb){if(cb) cb();};
 var afterEach = function(cb){if(cb) cb();};
+try {
+  new Buffer(925).copy(new Buffer(3072), 2048, 0, 925);
+} catch(e) {
+  Buffer.prototype.copy = function(dst, dstStart, srcStart, srcEnd) {
+    for(var j = srcStart; j < srcEnd; ++j) dst[j + dstStart] = this[j + srcStart];
+  };
+}
 /* xlsx.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint mocha:true */
--- a/legend.png
+++ b/legend.png
--- a/misc/import.js
+++ b/misc/import.js
@ -1 +0,0 @@
-export { version } from "../";
--- a/modules/.gitignore
+++ b/modules/.gitignore
@ -1,3 +1,9 @@
+test_files
 *.node.js
+*.[Pp][Rr][Oo][Tt][Oo]
+*.[Ii][Ww][Aa]
+*.[Jj][Pp][Gg]
+*.[Pp][Ll][Ii][Ss][Tt]
+DocumentIdentifier
 xlsx.zahl.*
 src/numbers.ts
--- a/modules/32_odmanrdf.js
+++ b/modules/32_odmanrdf.js
@ -1,61 +0,0 @@
-var CT_ODS = "application/vnd.oasis.opendocument.spreadsheet";
-function parse_manifest(d, opts) {
-  var str = xlml_normalize(d);
-  var Rn;
-  var FEtag;
-  while (Rn = xlmlregex.exec(str))
-    switch (Rn[3]) {
-      case "manifest":
-        break;
-      case "file-entry":
-        FEtag = parsexmltag(Rn[0], false);
-        if (FEtag.path == "/" && FEtag.type !== CT_ODS)
-          throw new Error("This OpenDocument is not a spreadsheet");
-        break;
-      case "encryption-data":
-      case "algorithm":
-      case "start-key-generation":
-      case "key-derivation":
-        throw new Error("Unsupported ODS Encryption");
-      default:
-        if (opts && opts.WTF)
-          throw Rn;
-    }
-}
-function write_manifest(manifest) {
-  var o = [XML_HEADER];
-  o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
-  o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
-  for (var i = 0; i < manifest.length; ++i)
-    o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
-  o.push("</manifest:manifest>");
-  return o.join("");
-}
-function write_rdf_type(file, res, tag) {
-  return [
-    '  <rdf:Description rdf:about="' + file + '">\n',
-    '    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + "#" + res + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
-}
-function write_rdf_has(base, file) {
-  return [
-    '  <rdf:Description rdf:about="' + base + '">\n',
-    '    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
-    "  </rdf:Description>\n"
-  ].join("");
-}
-function write_rdf(rdf) {
-  var o = [XML_HEADER];
-  o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
-  for (var i = 0; i != rdf.length; ++i) {
-    o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
-    o.push(write_rdf_has("", rdf[i][0]));
-  }
-  o.push(write_rdf_type("", "Document", "pkg"));
-  o.push("</rdf:RDF>");
-  return o.join("");
-}
-function write_meta_ods(wb, opts) {
-  return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>SheetJS ' + XLSX.version + "</meta:generator></office:meta></office:document-meta>";
-}
--- a/modules/32_odmanrdf.ts
+++ b/modules/32_odmanrdf.ts
@ -1,73 +0,0 @@
-/* Open Document Format for Office Applications (OpenDocument) Version 1.2 */
-
-import { WorkBook, ParsingOptions } from '../';
-import * as _XLSX from '../';
-declare var XLSX: typeof _XLSX;
-
-type RawData = any;
-declare var XML_HEADER: string;
-declare var xlmlregex: RegExp;
-declare function parsexmltag(tag: string, skip_root?: boolean, skip_LC?: boolean): any;
-declare function xlml_normalize(d: RawData): string;
-type RDF = [string, string][];
-
-/* Part 3 Section 4 Manifest File */
-var CT_ODS = "application/vnd.oasis.opendocument.spreadsheet";
-function parse_manifest(d: RawData, opts?: ParsingOptions) {
-	var str = xlml_normalize(d);
-	var Rn: RegExpExecArray | null;
-	var FEtag;
-	while((Rn = xlmlregex.exec(str))) switch(Rn[3]) {
-		case 'manifest': break; // 4.2 <manifest:manifest>
-		case 'file-entry': // 4.3 <manifest:file-entry>
-			FEtag = parsexmltag(Rn[0], false);
-			if(FEtag.path == '/' && FEtag.type !== CT_ODS) throw new Error("This OpenDocument is not a spreadsheet");
-			break;
-		case 'encryption-data': // 4.4 <manifest:encryption-data>
-		case 'algorithm': // 4.5 <manifest:algorithm>
-		case 'start-key-generation': // 4.6 <manifest:start-key-generation>
-		case 'key-derivation': // 4.7 <manifest:key-derivation>
-			throw new Error("Unsupported ODS Encryption");
-		default: if(opts && opts.WTF) throw Rn;
-	}
-}
-
-function write_manifest(manifest: RDF): string {
-	var o = [XML_HEADER];
-	o.push('<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2">\n');
-	o.push('  <manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/>\n');
-	for(var i = 0; i < manifest.length; ++i) o.push('  <manifest:file-entry manifest:full-path="' + manifest[i][0] + '" manifest:media-type="' + manifest[i][1] + '"/>\n');
-	o.push('</manifest:manifest>');
-	return o.join("");
-}
-
-/* Part 3 Section 6 Metadata Manifest File */
-function write_rdf_type(file: string, res: string, tag?: string): string {
-	return [
-		'  <rdf:Description rdf:about="' + file + '">\n',
-		'    <rdf:type rdf:resource="http://docs.oasis-open.org/ns/office/1.2/meta/' + (tag || "odf") + '#' + res + '"/>\n',
-		'  </rdf:Description>\n'
-	].join("");
-}
-function write_rdf_has(base: string, file: string): string {
-	return [
-		'  <rdf:Description rdf:about="' + base + '">\n',
-		'    <ns0:hasPart xmlns:ns0="http://docs.oasis-open.org/ns/office/1.2/meta/pkg#" rdf:resource="' + file + '"/>\n',
-		'  </rdf:Description>\n'
-	].join("");
-}
-function write_rdf(rdf: RDF): string {
-	var o: string[] = [XML_HEADER];
-	o.push('<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">\n');
-	for(var i = 0; i != rdf.length; ++i) {
-		o.push(write_rdf_type(rdf[i][0], rdf[i][1]));
-		o.push(write_rdf_has("",rdf[i][0]));
-	}
-	o.push(write_rdf_type("","Document", "pkg"));
-	o.push('</rdf:RDF>');
-	return o.join("");
-}
-/* TODO: pull properties */
-function write_meta_ods(wb?: WorkBook, opts?: any): string {
-	return '<office:document-meta xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" office:version="1.2"><office:meta><meta:generator>Sheet' + 'JS ' + XLSX.version + '</meta:generator></office:meta></office:document-meta>';
-}
--- a/modules/45_rtf.js
+++ b/modules/45_rtf.js
@ -13,18 +13,14 @@ function rtf_to_sheet(d, opts) {
 }
 function rtf_to_sheet_str(str, opts) {
  var o = opts || {};
-  var ws = {};
-  var dense = o.dense;
-  if (dense)
-    ws["!data"] = [];
+  var ws = o.dense ? [] : {};
  var rows = str.match(/\\trowd[\s\S]*?\\row\b/g);
  if (!rows)
    throw new Error("RTF missing table");
  var range = { s: { c: 0, r: 0 }, e: { c: 0, r: rows.length - 1 } };
-  var row = [];
  rows.forEach(function(rowtf, R) {
-    if (dense)
-      row = ws["!data"][R] = [];
+    if (Array.isArray(ws))
+      ws[R] = [];
    var rtfre = /\\[\w\-]+\b/g;
    var last_index = 0;
    var res;
@ -50,8 +46,8 @@ function rtf_to_sheet_str(str, opts) {
                cell.w = cell.v;
              cell.v = fuzzynum(cell.v);
            }
-            if (dense)
-              row[C] = cell;
+            if (Array.isArray(ws))
+              ws[R][C] = cell;
            else
              ws[encode_cell({ r: R, c: C })] = cell;
          }
@ -79,17 +75,15 @@ function sheet_to_rtf(ws, opts) {
  if (!ws["!ref"])
    return o[0] + "}";
  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = ws["!data"] != null, row = [];
+  var dense = Array.isArray(ws);
  for (var R = r.s.r; R <= r.e.r; ++R) {
    o.push("\\trowd\\trautofit1");
    for (var C = r.s.c; C <= r.e.c; ++C)
      o.push("\\cellx" + (C + 1));
    o.push("\\pard\\intbl");
-    if (dense)
-      row = ws["!data"][R] || [];
    for (C = r.s.c; C <= r.e.c; ++C) {
      var coord = encode_cell({ r: R, c: C });
-      cell = dense ? row[C] : ws[coord];
+      cell = dense ? (ws[R] || [])[C] : ws[coord];
      if (!cell || cell.v == null && (!cell.f || cell.F)) {
        o.push(" \\cell");
        continue;
--- a/modules/45_rtf.ts
+++ b/modules/45_rtf.ts
@ -1,6 +1,5 @@
-import { WorkBook, WorkSheet, Range, CellObject, DenseSheet, SparseSheet, ParsingOptions, WritingOptions } from '../';
+import { WorkBook, WorkSheet, Range, CellObject } from '../';
 import type { utils } from "../";
-type RawData = any;

 declare var encode_cell: typeof utils.encode_cell;
 declare var encode_range: typeof utils.encode_range;
@ -13,7 +12,7 @@ declare var has_buf: boolean;
 declare function Base64_decode(s: string): string;
 declare function fuzzynum(s: string): number;

-function rtf_to_sheet(d: RawData, opts: ParsingOptions): WorkSheet {
+function rtf_to_sheet(d/*:RawData*/, opts)/*:Worksheet*/ {
 	switch(opts.type) {
 		case 'base64': return rtf_to_sheet_str(Base64_decode(d), opts);
 		case 'binary': return rtf_to_sheet_str(d, opts);
@ -24,19 +23,16 @@ function rtf_to_sheet(d: RawData, opts: ParsingOptions): WorkSheet {
 }

 /* TODO: this is a stub */
-function rtf_to_sheet_str(str: string, opts: ParsingOptions): WorkSheet {
+function rtf_to_sheet_str(str: string, opts)/*:Worksheet*/ {
 	var o = opts || {};
 	// ESBuild issue 2375
-	var ws: WorkSheet = {} as WorkSheet;
-	var dense = o.dense;
-	if(dense) ws["!data"] = [];
+	var ws: WorkSheet = o.dense ? [] : ({}/*:any*/);

 	var rows = str.match(/\\trowd[\s\S]*?\\row\b/g);
 	if(!rows) throw new Error("RTF missing table");
 	var range: Range = {s: {c:0, r:0}, e: {c:0, r:rows.length - 1}};
-	var row: CellObject[] = [];
 	rows.forEach(function(rowtf, R) {
-		if(dense) row = (ws as DenseSheet)["!data"][R] = [] as CellObject[];
+		if(Array.isArray(ws)) ws[R] = [];
 		var rtfre = /\\[\w\-]+\b/g;
 		var last_index = 0;
 		var res;
@ -55,8 +51,8 @@ function rtf_to_sheet_str(str: string, opts: ParsingOptions): WorkSheet {
 						if(cell.v == "TRUE" || cell.v == "FALSE") { cell.v = cell.v == "TRUE"; cell.t = "b"; }
 						else if(!isNaN(fuzzynum(cell.v as string))) { cell.t = 'n'; if(o.cellText !== false) cell.w = cell.v as string; cell.v = fuzzynum(cell.v as string); }

-						if(dense) row[C] = cell;
-						else (ws as SparseSheet)[encode_cell({r:R, c:C})] = cell;
+						if(Array.isArray(ws)) ws[R][C] = cell;
+						else ws[encode_cell({r:R, c:C})] = cell;
 					}
 					payload = [];
 					break;
@ -72,26 +68,25 @@ function rtf_to_sheet_str(str: string, opts: ParsingOptions): WorkSheet {
 	return ws;
 }

-function rtf_to_workbook(d: RawData, opts: ParsingOptions): WorkBook {
+function rtf_to_workbook(d/*:RawData*/, opts): WorkBook {
 	var wb: WorkBook = sheet_to_workbook(rtf_to_sheet(d, opts), opts);
 	wb.bookType = "rtf";
 	return wb;
 }

 /* TODO: this is a stub */
-function sheet_to_rtf(ws: WorkSheet, opts: WritingOptions): string {
+function sheet_to_rtf(ws: WorkSheet, opts): string {
 	var o: string[] = ["{\\rtf1\\ansi"];
 	if(!ws["!ref"]) return o[0] + "}";
 	var r = safe_decode_range(ws['!ref']), cell: CellObject;
-	var dense = ws["!data"] != null, row: CellObject[] = [];
+	var dense = Array.isArray(ws);
 	for(var R = r.s.r; R <= r.e.r; ++R) {
 		o.push("\\trowd\\trautofit1");
 		for(var C = r.s.c; C <= r.e.c; ++C) o.push("\\cellx" + (C+1));
 		o.push("\\pard\\intbl");
-		if(dense) row = (ws as DenseSheet)["!data"][R] || ([] as CellObject[])
 		for(C = r.s.c; C <= r.e.c; ++C) {
 			var coord = encode_cell({r:R,c:C});
-			cell = dense ? row[C] : (ws as SparseSheet)[coord];
+			cell = dense ? (ws[R]||[])[C]: ws[coord];
 			if(!cell || cell.v == null && (!cell.f || cell.F)) { o.push(" \\cell"); continue; }
 			o.push(" " + (cell.w || (format_cell(cell), cell.w) || "").replace(/[\r\n]/g, "\\par "));
 			o.push("\\cell");
@ -100,3 +95,4 @@ function sheet_to_rtf(ws: WorkSheet, opts: WritingOptions): string {
 	}
 	return o.join("") + "}";
 }
+
--- a/modules/51_xlsbmeta.ts
+++ b/modules/51_xlsbmeta.ts
@ -61,7 +61,7 @@ function write_BrtBeginEsmdb(cnt: number, cm: boolean): RawData {
 }

 /* [MS-XLSB] 2.1.7.34 Metadata */
-function parse_xlmeta_bin(data: RawData, name: string, _opts?: ParseXLMetaOptions): XLMeta {
+function parse_xlmeta_bin(data, name: string, _opts?: ParseXLMetaOptions): XLMeta {
 	var out: XLMeta = { Types: [], Cell: [], Value: [] };
 	var opts = _opts || {};
 	var state: number[] = [];
--- a/modules/51_xlsxmeta.js
+++ b/modules/51_xlsxmeta.js
@ -71,7 +71,7 @@ function parse_xlmeta_xml(data, name, opts) {
        lastmeta.offsets.push(+y.i);
        break;
      default:
-        if (!pass && (opts == null ? void 0 : opts.WTF))
+        if (!pass && opts.WTF)
          throw new Error("unrecognized " + y[0] + " in metadata");
    }
    return x;
--- a/modules/51_xlsxmeta.ts
+++ b/modules/51_xlsxmeta.ts
@ -63,7 +63,7 @@ function parse_xlmeta_xml(data: string, name: string, opts?: ParseXLMetaOptions)
 				lastmeta.offsets.push(+y.i);
 				break;

-			default: if(!pass && opts?.WTF) throw new Error('unrecognized ' + y[0] + ' in metadata');
+			default: if(!pass && opts.WTF) throw new Error('unrecognized ' + y[0] + ' in metadata');
 		}
 		return x;
 	});
--- a/modules/83_numbers.js
+++ b/modules/83_numbers.js
--- a/modules/83_numbers.ts
+++ b/modules/83_numbers.ts
--- a/modules/Makefile
+++ b/modules/Makefile
@ -2,32 +2,24 @@ LIBFILES=src/types.ts
 #LIBFILES=$(wildcard src/*.ts)
 TSFILES=$(wildcard *.ts)
 ENTRIES=$(subst .ts,.js,$(TSFILES))
-CC=esbuild@0.14.14

-BAREJS=04_base64.js 32_odmanrdf.js 45_rtf.js 51_xlsxmeta.js 51_xlsbmeta.js 59_vba.js 64_ftab.js 83_numbers.js
+BAREJS=04_base64.js 45_rtf.js 51_xlsxmeta.js 51_xlsbmeta.js 59_vba.js 64_ftab.js 83_numbers.js

 .PHONY: all
-all: bits xlsx.zahl.js
+all: $(ENTRIES) xlsx.zahl.js

-.PHONY: lint
-lint: $(filter-out $(wildcard *.node.ts),$(TSFILES))
-	tsc --strict --noEmit $^
-
-.PHONY: bits
-bits: $(ENTRIES)
-
-xlsx.zahl.js: test.numbers
+xlsx.zahl.js: test.numbers reframe.node.js
 	bash -c ./reframe.sh

 $(BAREJS): %.js: %.ts $(LIBFILES)
-	npx $(CC) $< --outfile=$@ --platform=browser --target=es5
+	npx esbuild@0.14.14 $< --outfile=$@ --platform=browser --target=es5

 %.node.js: %.node.ts $(LIBFILES) src/numbers.ts
-	npx $(CC) $< --bundle --external:xlsx --outfile=$@ --platform=node
+	npx esbuild@0.14.14 $< --bundle --external:xlsx --outfile=$@ --platform=node
 	sed -i '' 's/ts-node/node/g' $@ || sed -i'' 's/ts-node/node/g' $@ || { echo "sed failed"; exit 1; }

 %.js: %.ts $(LIBFILES)
-	npx $(CC) $< --bundle --outfile=$@ --platform=browser --format=iife --global-name=$* --target=es5
+	npx esbuild@0.14.14 $< --bundle --outfile=$@ --platform=browser --format=iife --global-name=$* --target=es5

 src/numbers.ts: 83_numbers.ts
 	cat $< | sed 's/^\/\/<<//g' > $@
--- a/modules/reframe.node.ts
+++ b/modules/reframe.node.ts
@ -0,0 +1,631 @@
+/*! sheetjs (C) 2013-present SheetJS -- http://sheetjs.com */
+import { decompress_iwa_file, compress_iwa_file, u8concat, parse_iwa_file, write_iwa_file, varint_to_i32, parse_shallow, write_shallow, u8str, stru8, IWAArchiveInfo, parse_TSP_Reference, write_varint49, u8contains, u8_to_dataview, write_new_storage } from "./src/numbers";
+import { read, writeFile, utils, find, CFB$Entry, CFB$Container } from 'cfb';
+
+var f = process.argv[2]; var o = process.argv[3];
+var cfb = read(f, {type: "file"});
+
+var nuevo = utils.cfb_new();
+
+interface DependentInfo {
+  deps: number[];
+  location: string;
+  type: number;
+}
+var dependents: {[x:number]: DependentInfo} = {};
+var indices: number[] = [];
+
+/* First Pass: reframe, clean up junk, collect message space */
+cfb.FileIndex.map((fi, idx): [CFB$Entry, string] => ([fi, cfb.FullPaths[idx]])).forEach(row => {
+  var fi = row[0], fp = row[1];
+  /* blank all plist files */
+  if(fi.name.match(/\.plist/)) {
+    console.error(`Blanking plist ${fi.name}`);
+    fi.content = new Uint8Array([
+      0x62, 0x70, 0x6c, 0x69, 0x73, 0x74, 0x30, 0x30, 0xd0, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x0a
+    ]);
+    utils.cfb_add(nuevo, row[1], fi.content);
+    return;
+  }
+
+  if(fi.type != 2) return;
+
+  /* Remove other metadata */
+  if(!fi.name.match(/\.iwa/)) {
+    if(fi.name.match(/Sh33tJ5/)) return;
+    console.error(`Removing file ${fi.name}`);
+    return;
+  }
+
+  /* Reframe .iwa files */
+  var old_content = fi.content;
+  var raw1 = decompress_iwa_file(old_content as Uint8Array);
+  var new_content = compress_iwa_file(raw1);
+  var raw2 = decompress_iwa_file(new_content);
+  for(var i = 0; i < raw1.length; ++i) if(raw1[i] != raw2[i]) throw new Error(`${fi.name} did not properly roundtrip`);
+
+  var x = parse_iwa_file(raw2);
+  x.forEach(ia => {
+    ia.messages.forEach(m => {
+      delete m.meta[2];
+      delete m.meta[4];
+      delete m.meta[5]; // extremely slow open if deleted
+      for(var j = 6; j < m.meta.length; ++j) delete m.meta[j];
+    });
+  });
+
+  x.forEach(packet => {
+    indices.push(packet.id);
+    dependents[packet.id] = { deps: [], location: fp, type: varint_to_i32(packet.messages[0].meta[1][0].data) };
+  });
+
+  var y = write_iwa_file(x);
+  for(var i = 0; i < raw1.length; ++i) if(y[i] != raw1[i]) { console.log(fi.name, i, raw1[i], y[i]); break; }
+
+  var raw3 = compress_iwa_file(y);
+  fi.content = raw3; fi.size = fi.content.length;
+  // utils.cfb_add(nuevo, row[1], fi.content);
+});
+
+indices.sort((x,y) => x-y);
+var indices_varint: Array<[number, Uint8Array]> = indices.filter(x => x > 1).map(x => [x, write_varint49(x)] );
+
+/* Second pass: build dependency map */
+cfb.FileIndex.map((fi, idx): [CFB$Entry, string] => ([fi, cfb.FullPaths[idx]])).forEach(row => {
+  var fi = row[0], fp = row[1];
+  if(!fi?.name?.match(/\.iwa/)) return;
+  var x = parse_iwa_file(decompress_iwa_file(fi.content as Uint8Array));
+
+  x.forEach(ia => {
+    ia.messages.forEach(m => {
+      indices_varint.forEach(([i, vi]) => {
+        if(ia.messages.some(mess => varint_to_i32(mess.meta[1][0].data) != 11006 && u8contains(mess.data, vi))) {
+          dependents[i].deps.push(ia.id);
+        }
+      })
+    });
+  });
+});
+
+var deletables = [];
+function delete_message(id: number, cfb: CFB$Container) {
+  var dep = dependents[id];
+  if(dep?.deps?.length > 0) return console.error(`Message ${id} has dependents ${dep.deps}`);
+
+  //delete dependents[id];
+  indices = indices.filter(x => x != id);
+
+  /* TODO: this really should be a forward map */
+  indices.map(i => dependents[i]).filter(x => x).forEach(dep => {
+    dep.deps = dep.deps.filter(x => x != id);
+  });
+  if(deletables.indexOf(id) == -1) deletables.push(id);
+}
+
+function gc(cfb: CFB$Container) {
+  deletables.forEach(id => {
+    var dep = dependents[id];
+    var entry = find(cfb, dep.location);
+    var x = parse_iwa_file(decompress_iwa_file(entry.content as Uint8Array));
+
+    /* remove packet */
+    console.log(`Removing packet ${id} ${dependents[id]?.type || "NaN"}`);
+    for(var xi = 0; xi < x.length; ++xi) {
+      var packet = x[xi];
+      if(packet.id == id) { x.splice(xi,1); --xi; }
+    }
+
+    delete dependents[id];
+
+    entry.content = compress_iwa_file(write_iwa_file(x));
+    entry.size = entry.content.length;
+  });
+  deletables = [];
+
+}
+
+function delete_ref(dmeta: ReturnType<typeof parse_shallow>, j: number, me: number) {
+  if(!dmeta) return;
+  if(dmeta[j]) dmeta[j].forEach(pi => {
+    var target = parse_TSP_Reference(pi.data);
+    dependents[target].deps = dependents[target].deps.filter(x => x != me);
+    if(dependents[target].deps.length == 0) delete_message(target, cfb);
+  });
+  delete dmeta[j];
+}
+
+function shake() {
+  var done = false;
+  while(!done) {
+    done = true;
+    cfb.FileIndex.map((fi, idx): [CFB$Entry, string] => ([fi, cfb.FullPaths[idx]])).forEach(row => {
+      var fi = row[0], fp = row[1];
+      if(fi.name.match(/\.plist/)) return;
+      if(!fi.name.match(/\.iwa/)) return;
+      var old_content = fi.content;
+      var raw1 = decompress_iwa_file(old_content as Uint8Array);
+      var x = parse_iwa_file(raw1);
+
+      (()=>{
+        for(var i = 0; i < x.length; ++i) {
+          var w = x[i];
+          var type = varint_to_i32(w.messages[0].meta[1][0].data);
+          if(w.id > 10000 && (!dependents[w.id] || !dependents[w.id]?.deps?.length)) {
+            console.log(`Deleting orphan ${fp} ${w.id}`);
+            delete_message(w.id, cfb);
+            done = false;
+          }
+        }
+      })();
+
+      var y = write_iwa_file(x);
+      var raw3 = compress_iwa_file(y);
+      //fi.content = raw3;
+    });
+    gc(cfb);
+  }
+}
+
+/* Third pass: trim messages */
+cfb.FileIndex.map((fi, idx): [CFB$Entry, string] => ([fi, cfb.FullPaths[idx]])).forEach(row => {
+  var fi = row[0], fp = row[1];
+  if(!fi?.name?.match(/\.iwa/)) return;
+  var x = parse_iwa_file(decompress_iwa_file(fi.content as Uint8Array));
+
+  trim(x, fi);
+
+  var y = write_iwa_file(x);
+  var raw3 = compress_iwa_file(y);
+  fi.content = raw3;
+});
+gc(cfb);
+
+shake();
+
+function mutate_row(tri: ReturnType<typeof parse_shallow>) {
+  if(!tri[6]?.[0] || !tri[7]?.[0]) throw "Mutation only works on post-BNC storages!";
+  var wide_offsets = tri[8]?.[0]?.data && varint_to_i32(tri[8][0].data) > 0 || false;
+  var width = wide_offsets ? 4 : 1;
+  var dv = u8_to_dataview(tri[7][0].data);
+  var old_sz = 0, sz = 0;
+  for(var i = 0; i < tri[7][0].data.length / 2; ++i) {
+    sz = dv.getUint16(i*2, true);
+    if(sz < 65535) old_sz = sz;
+    if(old_sz) break;
+  }
+  if(!old_sz) old_sz = sz = tri[6][0].data.length;
+  var start = 0,
+    preamble = tri[6][0].data.slice(0, start),
+    intramble = tri[6][0].data.slice(start, old_sz * width),
+    postamble = tri[6][0].data.slice(old_sz * width);
+  var sst = []; sst[69] = "SheetJS";
+  //intramble = write_new_storage({t:"n", v:12345}, sst);
+  //intramble = write_new_storage({t:"b", v:false}, sst);
+  intramble = write_new_storage({t:"s", v:"SheetJS"}, sst);
+  tri[6][0].data = u8concat([preamble, intramble, postamble]);
+  var delta = intramble.length / width - old_sz;
+  for(var i = 0; i < tri[7][0].data.length / 2; ++i) {
+    sz = dv.getUint16(i*2, true);
+    if(sz < 65535 && sz > start) dv.setUint16(i*2, sz + delta, true);
+  }
+}
+
+/* Find first sheet -> first table -> add "SheetJS" to data store and set cell A1 */
+(function() {
+  var entry = find(cfb, dependents[1].location);
+  var x = parse_iwa_file(decompress_iwa_file(entry.content as Uint8Array));
+  var docroot: IWAArchiveInfo;
+  for(var xi = 0; xi < x.length; ++xi) {
+    var packet = x[xi];
+    if(packet.id == 1) docroot = packet;
+  }
+  var sheetrootref = parse_TSP_Reference(parse_shallow(docroot.messages[0].data)[1][0].data);
+
+  entry = find(cfb, dependents[sheetrootref].location);
+  x = parse_iwa_file(decompress_iwa_file(entry.content as Uint8Array));
+  for(xi = 0; xi < x.length; ++xi) {
+    var packet = x[xi];
+    if(packet.id == sheetrootref) docroot = packet;
+  }
+  sheetrootref = parse_TSP_Reference(parse_shallow(docroot.messages[0].data)[2][0].data);
+
+  entry = find(cfb, dependents[sheetrootref].location);
+  x = parse_iwa_file(decompress_iwa_file(entry.content as Uint8Array));
+  for(xi = 0; xi < x.length; ++xi) {
+    var packet = x[xi];
+    if(packet.id == sheetrootref) docroot = packet;
+  }
+  sheetrootref = parse_TSP_Reference(parse_shallow(docroot.messages[0].data)[2][0].data);
+
+  entry = find(cfb, dependents[sheetrootref].location);
+  x = parse_iwa_file(decompress_iwa_file(entry.content as Uint8Array));
+  for(xi = 0; xi < x.length; ++xi) {
+    var packet = x[xi];
+    if(packet.id == sheetrootref) docroot = packet;
+  }
+
+  var pb = parse_shallow(docroot.messages[0].data);
+  {
+    var store = parse_shallow(pb[4][0].data);
+    {
+      /* ref to string table */
+      var sstref = parse_TSP_Reference(store[4][0].data);
+      (() => {
+        var sentry = find(cfb, dependents[sstref].location);
+        var sx = parse_iwa_file(decompress_iwa_file(sentry.content as Uint8Array));
+        var sstroot: IWAArchiveInfo;
+        for(var sxi = 0; sxi < sx.length; ++sxi) {
+          var packet = sx[sxi];
+          if(packet.id == sstref) sstroot = packet;
+        }
+
+        var sstdata = parse_shallow(sstroot.messages[0].data);
+        {
+          if(!sstdata[3]) sstdata[3] = [];
+          var newsst: ReturnType<typeof parse_shallow> = [];
+          newsst[1] = [ { type: 0, data: write_varint49(69) } ];
+          newsst[2] = [ { type: 0, data: write_varint49(1) } ];
+          newsst[3] = [ { type: 2, data: stru8("SheetJS") } ];
+          sstdata[3].push({type: 2, data: write_shallow(newsst)});
+        }
+        sstroot.messages[0].data = write_shallow(sstdata);
+
+        var sy = write_iwa_file(sx);
+        var raw3 = compress_iwa_file(sy);
+        sentry.content = raw3; sentry.size = sentry.content.length;
+      })();
+
+      var tile = parse_shallow(store[3][0].data); // TileStorage
+      {
+        var t = tile[1][0];
+        delete tile[2];
+        var tl = parse_shallow(t.data); // first Tile
+        {
+          var tileref = parse_TSP_Reference(tl[2][0].data);
+          (() => {
+            var tentry = find(cfb, dependents[tileref].location);
+            var tx = parse_iwa_file(decompress_iwa_file(tentry.content as Uint8Array));
+            var tileroot: IWAArchiveInfo;
+            for(var sxi = 0; sxi < tx.length; ++sxi) {
+              var packet = tx[sxi];
+              if(packet.id == tileref) tileroot = packet;
+            }
+
+            // .TST.Tile
+            var tiledata = parse_shallow(tileroot.messages[0].data);
+            {
+              tiledata[5].forEach((row, R) => {
+                var tilerow = parse_shallow(row.data);
+                if(R == 0) mutate_row(tilerow);
+                row.data = write_shallow(tilerow);
+              })
+            }
+            tileroot.messages[0].data = write_shallow(tiledata);
+
+            var ty = write_iwa_file(tx);
+            var raw3 = compress_iwa_file(ty);
+            tentry.content = raw3; tentry.size = tentry.content.length;
+            //throw dependents[tileref];
+          })();
+        }
+        t.data = write_shallow(tl);
+      }
+      store[3][0].data = write_shallow(tile);
+    }
+    pb[4][0].data = write_shallow(store);
+  }
+  docroot.messages[0].data = write_shallow(pb);
+
+  var y = write_iwa_file(x);
+  var raw3 = compress_iwa_file(y);
+  entry.content = raw3; entry.size = entry.content.length;
+})();
+
+//console.log(indices.map(i => [i, dependents[i]]).filter(([i, dep]) => dep?.deps && (dep.deps.length == 0 || dep.deps.length == 1 && dep.deps[0] == 1)));
+
+/* Last pass: fix metadata and commit to new file */
+cfb.FileIndex.map((fi, idx): [CFB$Entry, string] => ([fi, cfb.FullPaths[idx]])).forEach(row => {
+  var fi = row[0], fp = row[1];
+  if(!fi?.name?.match(/\.iwa/)) return;
+  var x = parse_iwa_file(decompress_iwa_file(fi.content as Uint8Array));
+
+  if(fi.name.match(/^Metadata.iwa$/)) {
+    x.forEach((w: IWAArchiveInfo) => {
+      var type = varint_to_i32(w.messages[0].meta[1][0].data);
+      if(type != 11006) return;
+      var package_metadata = parse_shallow(w.messages[0].data);
+      [3,11].forEach(x => {
+        if(!package_metadata[x]) return;
+        for(var pmj = 0; pmj < package_metadata[x].length; ++pmj) {
+          var ci = package_metadata[x][pmj];
+          var comp = parse_shallow(ci.data);
+          var compid = varint_to_i32(comp[1][0].data);
+          if(!dependents[compid]) {
+            console.log(`Removing ${compid} (${u8str(comp[2][0].data)} -> ${comp[3]?.[0] && u8str(comp[3][0].data) || ""}) from metadata`);
+            package_metadata[x].splice(pmj, 1);
+            --pmj; continue;
+          }
+          [13, 14, 15].forEach(j => delete comp[j]);
+          ci.data = write_shallow(comp);
+        }
+      });
+      [2, 4, 6, 8, 9].forEach(j => delete package_metadata[j]);
+      w.messages[0].data = write_shallow(package_metadata);
+    });
+  }
+
+  var y = write_iwa_file(x);
+  var raw3 = compress_iwa_file(y);
+  fi.content = raw3;
+  if(x.length == 0) {
+    console.log(`Deleting ${fi.name} (no messages)`);
+    return;
+  }
+  if(fi.name.match(/^Metadata.iwa$/)) {
+    console.error(`Reframing iwa ${fi.name} (${fi.size} -> ${fi.content.length})`);
+    fi.size = fi.content.length;
+    utils.cfb_add(nuevo, row[1], fi.content);
+  } else {
+    console.error(`Reframing iwa ${fi.name} (${fi.size} -> ${fi.content.length})`);
+    fi.size = fi.content.length;
+    utils.cfb_add(nuevo, row[1], fi.content);
+  }
+});
+
+writeFile(nuevo, o, { fileType: "zip", compression: true });
+
+function process_root(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  var tsa = parse_shallow(dmeta[8][0].data);
+  {
+    var tsk = parse_shallow(tsa[1][0].data);
+    {
+      [7, 8, 14].forEach(j => delete_ref(tsk, j, id)); // annotation_author_storage
+      [4, 9, 10, 11, 12, 15, 16, 17].forEach(j => delete tsk[j]);
+    }
+    tsa[1][0].data = write_shallow(tsk);
+    [5, 6, 7, 10, 11, 12, 13].forEach(j => delete_ref(tsa, j, 1));
+    [3, 8, 9, 14, 15, 16].forEach(j => delete tsa[j]);
+  }
+  dmeta[8][0].data = write_shallow(tsa);
+}
+
+function process_sheet(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 20, 21, 23, 24].forEach(j => delete dmeta[j]);
+  [15, 16, 17, 18, 19, 22].forEach(j => delete_ref(dmeta, j, id));
+}
+
+function process_TST_TableInfoArchive(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [7, 8, 9, 10, 14, 16].forEach(j => delete dmeta[j]);
+  [3, 4, 5, 6, 15, 17].forEach(j => delete_ref(dmeta, j, id));
+}
+
+function process_TST_TableModelArchive(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [90, 91, 92].forEach(j => delete dmeta[j]);
+  [34, 35, 38, 49].forEach(j => delete_ref(dmeta, j, id));
+  [60, 61, 62, 63, 64, 65, 66, 67, 68, 69].forEach(j => delete_ref(dmeta, j, id));
+  [70].forEach(j => delete dmeta[j]);
+  [71, 72, 73, 74, 75, 76, 77, 78, 79, 80].forEach(j => delete_ref(dmeta, j, id));
+  [85, 86, 87, 88, 89].forEach(j => delete_ref(dmeta, j, id));
+  var store = parse_shallow(dmeta[4][0].data);
+  { // .TST.DataStore
+    [12, 13, 15, 16, 17, 18, 19, 20, 21, 22].forEach(j => delete_ref(store, j, id));
+    var tiles = parse_shallow(store[3][0].data);
+    { // .TST.TileStorage
+      //console.log(parse_TSP_Reference(parse_shallow(tiles[1][0].data)[2][0].data));
+    }
+    store[3][0].data = write_shallow(tiles);
+  //   4  -> sst
+  //   17 -> rsst
+  }
+  dmeta[4][0].data = write_shallow(store);
+}
+
+function process_TN_ThemeArchive(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [2].forEach(j => delete_ref(dmeta, j, id));
+  var tssta = parse_shallow(dmeta[1][0].data);
+  {
+    //Object.keys(tssta).filter(x => +x >= 100).forEach(j => delete tssta[j]);
+  }
+  dmeta[1][0].data = write_shallow(tssta);
+}
+
+function process_TSS_StylesheetArchive(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [7, 8, 9, 10, 11, 12].forEach(j => {
+    if(!dmeta[j]) return;
+    var vstyle = parse_shallow(dmeta[j][0].data);
+    delete_ref(vstyle, 1, id);
+    if(vstyle[2]) vstyle[2].forEach(ised => {
+      var ise = parse_shallow(ised.data);
+      delete_ref(ise, 2, id);
+    })
+    if(vstyle[3]) vstyle[3].forEach(sced => {
+      var sce = parse_shallow(sced.data);
+      delete_ref(sce, 2, id);
+      delete_ref(sce, 1, id);
+    })
+    delete dmeta[j];
+  });
+  dmeta[4] = [{data: write_varint49(0), type: 0}];
+  [3].forEach(j => delete_ref(dmeta, j, id));
+  dmeta[5]?.forEach(pi => {
+    var sce = parse_shallow(pi.data);
+    delete_ref(sce, 1, id);
+    delete_ref(sce, 2, id);
+  }); delete dmeta[5];
+  var deleted_styles = [];
+  if(dmeta[2]) for(var pij = 0; pij < dmeta[2].length; ++pij) {
+    var ise = parse_shallow(dmeta[2][pij].data);
+    var sname = u8str(ise[1][0].data);
+    if(sname.match(/_\d*$/) || sname.match(/^(captions|chart|image|movie|stickyComment)/) || sname.match(/evel[2-5]|pivot|liststyle/) ) {
+      var deletedid = parse_TSP_Reference(ise[2][0].data);
+      console.log(`Deleting style ${sname} [${deletedid}]`);
+      deleted_styles.push(deletedid);
+      delete_ref(ise, 2, id);
+      dmeta[2].splice(pij,1);
+      --pij; continue;
+    } else console.log(`Keeping style ${sname}`)
+  }
+  if(dmeta[1]) for(var sj = 0; sj < dmeta[1].length; ++sj) {
+    var dsid = parse_TSP_Reference(dmeta[1][sj].data);
+    if(deleted_styles.indexOf(dsid) > -1) {
+      //console.log(`Really deleting style ${dsid}`);
+      dependents[dsid].deps = dependents[dsid].deps.filter(x => x != id);
+      if(dependents[dsid].deps.length == 0) delete_message(dsid, cfb);
+      dmeta[1].splice(sj, 1); --sj; continue;
+    }
+  }
+  [6].forEach(j => delete dmeta[j]);
+}
+
+function process_TSCE_CalculationEngineArchive(dmeta: ReturnType<typeof parse_shallow>, id: number) {
+  [3, 12, 14, 15].forEach(j => delete_ref(dmeta, j, id));
+  [1, 4, 5, 6, 7, 9, 10, 11, 13, 16, 17, 18].forEach(i => delete dmeta[i]);
+  var dta = parse_shallow(dmeta[2][0].data);
+  delete dta[5]; delete dta[2]; delete dta[4];
+  delete dta[1]; delete dta[3]; delete_ref(dta, 6, id);
+  dmeta[2][0].data = write_shallow(dta);
+}
+
+function trim(x: IWAArchiveInfo[], fi: CFB$Entry) {
+  for(var i = 0; i < x.length; ++i) {
+    var w = x[i];
+    var type = varint_to_i32(w.messages[0].meta[1][0].data);
+    var dmeta = parse_shallow(w.messages[0].data);
+
+    switch(type) {
+      case 222: // .TSK.CustomFormatListArchive
+      case 601: // .TSA.FunctionBrowserStateArchive
+        x.splice(i, 1); --i; continue;
+      case 3047: break; // .TSD.GuideStorageArchive
+      case 205: {
+      } break; // .TSK.TreeNode
+
+      case 1: { // .TN.DocumentArchive
+        process_root(dmeta, w.id);
+      } break;
+      case 2: { // .TN.SheetArchive
+        process_sheet(dmeta, w.id);
+      } break;
+      case 6000: { // .TST.TableInfoArchive
+        process_TST_TableInfoArchive(dmeta, w.id);
+      } break;
+      case 6001: { // .TST.TableModelArchive
+        process_TST_TableModelArchive(dmeta, w.id)
+      } break;
+      case 401: { // .TSS.StylesheetArchive
+        process_TSS_StylesheetArchive(dmeta, w.id);
+        break;
+      }
+      case 11011: { // .TSP.DocumentMetadata
+        [1, 3].forEach(i => delete dmeta[i]);
+      } break;
+      case 6002: {
+        //process_TST_Tile(dmeta, w.id);
+      } break; // .TST.Tile
+      case 6005: break; // .TST.TableDataList
+      case 6006: break; // .TST.HeaderStorageBucket
+      case 2001: break; // .TSWP.StorageArchive
+      case 12009: process_TN_ThemeArchive(dmeta, w.id); break; // .TN.ThemeArchive
+
+      case 3097: break; // .TSD.StandinCaptionArchive
+      case 4000: process_TSCE_CalculationEngineArchive(dmeta, w.id); break; // .TSCE.CalculationEngineArchive
+      case 4003: break; // .TSCE.NamedReferenceManagerArchive
+      case 4004: break; // .TSCE.TrackedReferenceStoreArchive
+      case 4008: { // .TSCE.FormulaOwnerDependenciesArchive
+        [11].forEach(j => delete_ref(dmeta, j, w.id));
+        [3].forEach(i => delete dmeta[i]);
+      } break;
+      case 4009: { // .TSCE.CellRecordTileArchive
+        delete dmeta[4];
+      } break;
+      case 6267: { // .TST.ColumnRowUIDMapArchive
+        // console.log("CRUIDMA", dmeta[1]?.[0], dmeta[2]?.[0], dmeta[3]?.[0]);
+        //[1,2,3,4,5,6].forEach(j => delete dmeta[j]); break;
+      } break;
+      case 6366: break; // .TST.HeaderNameMgrArchive
+      case 6204: break; // .TST.HiddenStateFormulaOwnerArchive
+      case 6220: break; // .TST.FilterSetArchive
+      case 6305: break; // .TST.StrokeSidecarArchive
+      case 6316: break; // .TST.SummaryModelArchive
+      case 6317: break; // .TST.SummaryCellVendorArchive
+      case 6318: break; // .TST.CategoryOrderArchive
+      case 6372: break; // .TST.CategoryOwnerRefArchive
+      case 6373: break; // .TST.GroupByArchive
+      case 2043: [2,3,4].forEach(j => delete dmeta[j]); break; // .TSWP.NumberAttachmentArchive
+
+      case 5020: // .TSCH.ChartStylePreset
+        //[1,2,3,4,5,6].forEach(j => delete_ref(dmeta, j, w.id)); // some part of this is required to auto-save
+        Object.keys(dmeta).filter(x => +x >= 10000).forEach(j => delete dmeta[j]);
+        break;
+      case 5022: // .TSCH.ChartStyleArchive
+      case 5024: // .TSCH.LegendStyleArchive
+      case 5026: // .TSCH.ChartAxisStyleArchive
+      case 5028: // .TSCH.ChartSeriesStyleArchive
+      case 5030: // .TSCH.ReferenceLineStyleArchive
+        Object.keys(dmeta).filter(x => +x >= 10000).forEach(j => delete dmeta[j]);
+        break;
+      case 2021: break;
+      case 2022: [10,11,12].forEach(j => delete dmeta[j]); break; // .TSWP.ParagraphStyleArchive
+      case 2023: [10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25].forEach(j => delete dmeta[j]); break; // .TSWP.ListStyleArchive
+      case 3016: [10,11].forEach(j => delete dmeta[j]); break; // .TSD.MediaStyleArchive
+      case 2025: /* [10,11].forEach(j => delete dmeta[j]); */ break; // .TSWP.ShapeStyleArchive
+      case 6003: /* [10,11].forEach(j => delete dmeta[j]); */ break; // .TST.TableStyleArchive
+      case 6004: /* [10,11].forEach(j => delete dmeta[j]); */ break; // .TST.CellStyleArchive
+      case 10024: [10,11,12].forEach(j => delete dmeta[j]); break; // .TN.DropCapStyleArchive
+      case 12050: /* [2,3].forEach(j => delete dmeta[j]); */ break; // .TN.SheetStyleArchive
+      case 3045: break; // .TSD.CanvasSelectionArchive
+
+      case 6008: {
+        [1].forEach(j => delete dmeta[j]);
+        [2].forEach(j => delete_ref(dmeta, j, w.id));
+        // deleting 3 -> -[TSWPLayoutManager initWithStorage:owner:] /Library/Caches/com.apple.xbs/Sources/iWorkDependenciesMacOS/iWorkDependenciesMacOS-7032.0.145/shared/text/TSWPLayoutManager.mm:82 Cannot initialize with a nil storage.
+      } break; // .TST.TableStylePresetArchive
+
+      case 6247: {
+        [ 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 ].forEach(j => delete_ref(dmeta, j, w.id));
+      } break; // .TST.TableStyleNetworkArchive
+
+      case 210: { // .TSK.ViewStateArchive
+        [2, 3].forEach(i => delete dmeta[i]);
+      } break;
+      case 12026: { // .TN.UIStateArchive
+        delete dmeta[13];
+      } break;
+
+      case 219: delete dmeta[1]; break; // .DocumentSelectionArchive
+
+      case 12028: break; // .TN.SheetSelectionArchive
+      case 3061: { // .TSD.DrawableSelectionArchive
+        [3].forEach(j => delete_ref(dmeta, j, w.id));
+      } break;
+      case 3091: { // .TSD.FreehandDrawingToolkitUIState
+        [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15].forEach(i => delete dmeta[i]);
+      } break;
+
+      /* Metadata.iwa */
+      case 11006: { // .TSP.PackageMetadata
+        [10].forEach(j => delete_ref(dmeta, j, w.id));
+      } break;
+      case 11014: // .TSP.DataMetadata
+        [1].forEach(j => delete dmeta[j]);
+        break;
+      case 11015: // .TSP.DataMetadataMap
+        dmeta?.[1]?.forEach((r, idx) => {
+          var ddmeta = parse_shallow(r.data);
+          [2].forEach(j => delete_ref(ddmeta, j, w.id));
+        });
+        delete dmeta[1];
+        dmeta.length = 0;
+        break;
+
+      /* AnnotationAuthorStorage.iwa */
+      case 213: break; // TSK.AnnotationAuthorStorageArchive
+
+      default:
+        console.log("!!", fi.name, type, w.id, w.messages.length);
+    }
+    w.messages[0].data = write_shallow(dmeta);
+  }
+}
--- a/modules/reframe.sh
+++ b/modules/reframe.sh
@ -2,13 +2,13 @@
 set -eo pipefail
 INF=${1:-test.numbers}
 OUTF=${2:-reframed.numbers}
+make reframe.node.js
+node reframe.node.js "$INF" "$OUTF"
 chmod a+w "$OUTF"
-cp "$INF" "$OUTF"
-chmod a-w "$OUTF"
 sleep 0.1
 # open "$OUTF"
 unzip -l "$OUTF"
-(base64 "$OUTF" || base64 -i "$OUTF") | tr -d '\n' > xlsx.zahl.js
+base64 "$OUTF" | tr -d '\n' > xlsx.zahl.js
 sed -i.bak 's/^/var XLSX_ZAHL_PAYLOAD = "/g;s/$/";\n/g' xlsx.zahl.js
 cp xlsx.zahl.js xlsx.zahl.mjs
 cat >> xlsx.zahl.js <<EOF
--- a/modules/test.numbers
+++ b/modules/test.numbers
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
 	"name": "xlsx",
-	"version": "0.19.3",
+	"version": "0.18.10",
 	"author": "sheetjs",
 	"description": "SheetJS Spreadsheet data parser and writer",
 	"keywords": [
@ -28,47 +28,22 @@
 	"exports": {
 		".": {
 			"import": "./xlsx.mjs",
-			"require": "./xlsx.js",
-			"types": "./types/index.d.ts"
+			"require": "./xlsx.js"
 		},
 		"./xlsx.mjs": {
-			"import": "./xlsx.mjs",
-			"types": "./types/index.d.ts"
-		},
-		"./xlsx.js": {
-			"require": "./xlsx.js",
-			"types": "./types/index.d.ts"
+			"import": "./xlsx.mjs"
 		},
 		"./dist/xlsx.zahl": {
 			"import": "./dist/xlsx.zahl.mjs",
-			"require": "./dist/xlsx.zahl.js",
-			"types": "./dist/zahl.d.ts"
-		},
-		"./dist/xlsx.zahl.mjs": {
-			"import": "./dist/xlsx.zahl.mjs",
-			"types": "./dist/zahl.d.ts"
-		},
-		"./dist/xlsx.zahl.js": {
-			"require": "./dist/xlsx.zahl.js",
-			"types": "./dist/zahl.d.ts"
+			"require": "./dist/xlsx.zahl.js"
 		},
 		"./dist/cpexcel": {
 			"import": "./dist/cpexcel.full.mjs",
-			"require": "./dist/cpexcel.js",
-			"types": "./dist/cpexcel.d.ts"
-		},
-		"./dist/cpexcel.js": {
-			"require": "./dist/cpexcel.js",
-			"types": "./dist/cpexcel.d.ts"
+			"require": "./dist/cpexcel.js"
 		},
 		"./dist/cpexcel.full": {
 			"import": "./dist/cpexcel.full.mjs",
-			"require": "./dist/cpexcel.js",
-			"types": "./dist/cpexcel.d.ts"
-		},
-		"./dist/cpexcel.full.mjs": {
-			"import": "./dist/cpexcel.full.mjs",
-			"types": "./dist/cpexcel.d.ts"
+			"require": "./dist/cpexcel.js"
 		}
 	},
 	"browser": {
@ -109,7 +84,7 @@
 	},
 	"repository": {
 		"type": "git",
-		"url": "https://git.sheetjs.com/SheetJS/sheetjs"
+		"url": "git://github.com/SheetJS/sheetjs.git"
 	},
 	"scripts": {
 		"pretest": "npm run lint",
@ -138,7 +113,7 @@
 	},
 	"homepage": "https://sheetjs.com/",
 	"bugs": {
-		"url": "https://git.sheetjs.com/SheetJS/sheetjs/issues"
+		"url": "https://github.com/SheetJS/sheetjs/issues"
 	},
 	"license": "Apache-2.0",
 	"engines": {
--- a/packages/otorp/otorp.ts
+++ b/packages/otorp/otorp.ts
@ -1,610 +0,0 @@
-#!/usr/bin/env -S deno run -A
-/*! otorp (C) 2021-present SheetJS -- http://sheetjs.com */
-import { resolve } from "https://deno.land/std@0.171.0/path/mod.ts";
-import { TerminalSpinner } from "https://deno.land/x/spinners/mod.ts";
-
-// #region util.ts
-
-var u8_to_dataview = (array: Uint8Array): DataView => new DataView(array.buffer, array.byteOffset, array.byteLength);
-
-var u8str = (u8: Uint8Array): string => new TextDecoder().decode(u8);
-
-var u8concat = (u8a: Uint8Array[]): Uint8Array => {
-  var len = u8a.reduce((acc: number, x: Uint8Array) => acc + x.length, 0);
-  var out = new Uint8Array(len);
-  var off = 0;
-  u8a.forEach(u8 => { out.set(u8, off); off += u8.length; });
-  return out;
-};
-
-var indent = (str: string, depth: number /* = 1 */): string => str.split(/\n/g).map(x => x && "  ".repeat(depth) + x).join("\n");
-
-function u8indexOf(u8: Uint8Array, data: string | number | Uint8Array, byteOffset?: number): number {
-  //if(Buffer.isBuffer(u8)) return u8.indexOf(data, byteOffset);
-  if(typeof data == "number") return u8.indexOf(data, byteOffset);
-  var l = byteOffset;
-  if(typeof data == "string") {
-    outs: while((l = u8.indexOf(data.charCodeAt(0), l)) > -1) {
-      ++l;
-      for(var j = 1; j < data.length; ++j) if(u8[l+j-1] != data.charCodeAt(j)) continue outs;
-      return l - 1;
-    }
-  } else {
-    outb: while((l = u8.indexOf(data[0], l)) > -1) {
-      ++l;
-      for(var j = 1; j < data.length; ++j) if(u8[l+j-1] != data[j]) continue outb;
-      return l - 1;
-    }
-  }
-  return -1;
-}
-
-// #endregion
-
-// #region proto.ts
-
-type Ptr = [number];
-
-/** Parse an integer from the varint that can be exactly stored in a double */
-function parse_varint49(buf: Uint8Array, ptr?: Ptr): number {
-  var l = ptr ? ptr[0] : 0;
-  var usz = buf[l] & 0x7F;
-  varint: if(buf[l++] >= 0x80) {
-    usz |= (buf[l] & 0x7F) <<  7; if(buf[l++] < 0x80) break varint;
-    usz |= (buf[l] & 0x7F) << 14; if(buf[l++] < 0x80) break varint;
-    usz |= (buf[l] & 0x7F) << 21; if(buf[l++] < 0x80) break varint;
-    usz += (buf[l] & 0x7F) * Math.pow(2, 28); ++l; if(buf[l++] < 0x80) break varint;
-    usz += (buf[l] & 0x7F) * Math.pow(2, 35); ++l; if(buf[l++] < 0x80) break varint;
-    usz += (buf[l] & 0x7F) * Math.pow(2, 42); ++l; if(buf[l++] < 0x80) break varint;
-  }
-  if(ptr) ptr[0] = l;
-  return usz;
-}
-
-function write_varint49(v: number): Uint8Array {
-  var usz = new Uint8Array(7);
-  usz[0] = (v & 0x7F);
-  var L = 1;
-  sz: if(v > 0x7F) {
-    usz[L-1] |= 0x80; usz[L] = (v >> 7) & 0x7F; ++L;
-    if(v <= 0x3FFF) break sz;
-    usz[L-1] |= 0x80; usz[L] = (v >> 14) & 0x7F; ++L;
-    if(v <= 0x1FFFFF) break sz;
-    usz[L-1] |= 0x80; usz[L] = (v >> 21) & 0x7F; ++L;
-    if(v <= 0xFFFFFFF) break sz;
-    usz[L-1] |= 0x80; usz[L] = ((v/0x100) >>> 21) & 0x7F; ++L;
-    if(v <= 0x7FFFFFFFF) break sz;
-    usz[L-1] |= 0x80; usz[L] = ((v/0x10000) >>> 21) & 0x7F; ++L;
-    if(v <= 0x3FFFFFFFFFF) break sz;
-    usz[L-1] |= 0x80; usz[L] = ((v/0x1000000) >>> 21) & 0x7F; ++L;
-  }
-  return usz.slice(0, L);
-}
-
-/** Parse a 32-bit signed integer from the raw varint */
-function varint_to_i32(buf: Uint8Array): number {
-  var l = 0, i32 = buf[l] & 0x7F;
-  varint: if(buf[l++] >= 0x80) {
-    i32 |= (buf[l] & 0x7F) <<  7; if(buf[l++] < 0x80) break varint;
-    i32 |= (buf[l] & 0x7F) << 14; if(buf[l++] < 0x80) break varint;
-    i32 |= (buf[l] & 0x7F) << 21; if(buf[l++] < 0x80) break varint;
-    i32 |= (buf[l] & 0x7F) << 28;
-  }
-  return i32;
-}
-
-interface ProtoItem {
-  offset?: number;
-  data: Uint8Array;
-  type: number;
-}
-type ProtoField = Array<ProtoItem>
-type ProtoMessage = Array<ProtoField>;
-
-/** Shallow parse of a message */
-function parse_shallow(buf: Uint8Array): ProtoMessage {
-  var out: ProtoMessage = [], ptr: Ptr = [0];
-  while(ptr[0] < buf.length) {
-    var off = ptr[0];
-    var num = parse_varint49(buf, ptr);
-    var type = num & 0x07; num = Math.floor(num / 8);
-    var len = 0;
-    var res: Uint8Array;
-    if(num == 0) break;
-    switch(type) {
-      case 0: {
-        var l = ptr[0];
-        while(buf[ptr[0]++] >= 0x80);
-        res = buf.slice(l, ptr[0]);
-      } break;
-      case 5: len = 4; res = buf.slice(ptr[0], ptr[0] + len); ptr[0] += len; break;
-      case 1: len = 8; res = buf.slice(ptr[0], ptr[0] + len); ptr[0] += len; break;
-      case 2: len = parse_varint49(buf, ptr); res = buf.slice(ptr[0], ptr[0] + len); ptr[0] += len; break;
-      case 3: // Start group
-      case 4: // End group
-      default: throw new Error(`PB Type ${type} for Field ${num} at offset ${off}`);
-    }
-    var v: ProtoItem = { offset: off, data: res, type };
-    if(out[num] == null) out[num] = [v];
-    else out[num].push(v);
-  }
-  return out;
-}
-
-/** Serialize a shallow parse */
-function write_shallow(proto: ProtoMessage): Uint8Array {
-  var out: Uint8Array[] = [];
-  proto.forEach((field, idx) => {
-    field.forEach(item => {
-      out.push(write_varint49(idx * 8 + item.type));
-      out.push(item.data);
-    });
-  });
-  return u8concat(out);
-}
-
-function mappa<U>(data: ProtoField, cb:(_:Uint8Array) => U): U[] {
-  if(!data) return [];
-  return data.map((d) => { try {
-    return cb(d.data);
-  } catch(e) {
-    var m = e.message?.match(/at offset (\d+)/);
-    if(m) e.message = e.message.replace(/at offset (\d+)/, "at offset " + (+m[1] + (d.offset||0)));
-    throw e;
-  }});
-}
-
-// #endregion
-
-// #region descriptor.ts
-
-var TYPES = [
-  "error",
-  "double",
-  "float",
-  "int64",
-  "uint64",
-  "int32",
-  "fixed64",
-  "fixed32",
-  "bool",
-  "string",
-  "group",
-  "message",
-  "bytes",
-  "uint32",
-  "enum",
-  "sfixed32",
-  "sfixed64",
-  "sint32",
-  "sint64"
-];
-
-
-interface FileOptions {
-  javaPackage?: string;
-  javaOuterClassname?: string;
-  javaMultipleFiles?: string;
-  goPackage?: string;
-}
-function parse_FileOptions(buf: Uint8Array): FileOptions {
-  var data = parse_shallow(buf);
-  var out: FileOptions = {};
-  if(data[1]?.[0]) out.javaPackage = u8str(data[1][0].data);
-  if(data[8]?.[0]) out.javaOuterClassname = u8str(data[8][0].data);
-  if(data[11]?.[0]) out.goPackage = u8str(data[11][0].data);
-  return out;
-}
-
-
-interface EnumValue {
-  name?: string;
-  number?: number;
-}
-function parse_EnumValue(buf: Uint8Array): EnumValue {
-  var data = parse_shallow(buf);
-  var out: EnumValue = {};
-  if(data[1]?.[0]) out.name = u8str(data[1][0].data);
-  if(data[2]?.[0]) out.number = varint_to_i32(data[2][0].data);
-  return out;
-}
-
-
-interface Enum {
-  name?: string;
-  value?: EnumValue[];
-}
-function parse_Enum(buf: Uint8Array): Enum {
-  var data = parse_shallow(buf);
-  var out: Enum = {};
-  if(data[1]?.[0]) out.name = u8str(data[1][0].data);
-  out.value = mappa(data[2], parse_EnumValue);
-  return out;
-}
-var write_Enum = (en: Enum): string => {
-  var out = [`enum ${en.name} {`];
-  en.value?.forEach(({name, number}) => out.push(`  ${name} = ${number};`));
-  return out.concat(`}`).join("\n");
-};
-
-
-interface FieldOptions {
-  packed?: boolean;
-  deprecated?: boolean;
-}
-function parse_FieldOptions(buf: Uint8Array): FieldOptions {
-  var data = parse_shallow(buf);
-  var out: FieldOptions = {};
-  if(data[2]?.[0]) out.packed = !!data[2][0].data;
-  if(data[3]?.[0]) out.deprecated = !!data[3][0].data;
-  return out;
-}
-
-
-interface Field {
-  name?: string;
-  extendee?: string;
-  number?: number;
-  label?: number;
-  type?: number;
-  typeName?: string;
-  defaultValue?: string;
-  options?: FieldOptions;
-}
-function parse_Field(buf: Uint8Array): Field {
-  var data = parse_shallow(buf);
-  var out: Field = {};
-  if(data[1]?.[0]) out.name = u8str(data[1][0].data);
-  if(data[2]?.[0]) out.extendee = u8str(data[2][0].data);
-  if(data[3]?.[0]) out.number = varint_to_i32(data[3][0].data);
-  if(data[4]?.[0]) out.label = varint_to_i32(data[4][0].data);
-  if(data[5]?.[0]) out.type = varint_to_i32(data[5][0].data);
-  if(data[6]?.[0]) out.typeName = u8str(data[6][0].data);
-  if(data[7]?.[0]) out.defaultValue = u8str(data[7][0].data);
-  if(data[8]?.[0]) out.options = parse_FieldOptions(data[8][0].data);
-  return out;
-}
-function write_Field(field: Field): string {
-  var out = [];
-  var label = ["", "optional ", "required ", "repeated "][field.label||0] || "";
-  var type = field.typeName || TYPES[field.type||69] || "s5s";
-  var opts = [];
-  if(field.defaultValue) opts.push(`default = ${field.defaultValue}`);
-  if(field.options?.packed) opts.push(`packed = true`);
-  if(field.options?.deprecated) opts.push(`deprecated = true`);
-  var os = opts.length ? ` [${opts.join(", ")}]`: "";
-  out.push(`${label}${type} ${field.name} = ${field.number}${os};`);
-  return out.length ? indent(out.join("\n"), 1) : "";
-}
-
-
-function write_extensions(ext: Field[], xtra = false, coalesce = true): string {
-  var res: string[] = [];
-  var xt: Array<[string, Array<Field>]> = [];
-  ext.forEach(ext => {
-    if(!ext.extendee) return;
-    var row = coalesce ?
-      xt.find(x => x[0] == ext.extendee) :
-      (xt[xt.length - 1]?.[0] == ext.extendee ? xt[xt.length - 1]: null);
-    if(row) row[1].push(ext);
-    else xt.push([ext.extendee, [ext]]);
-  });
-  xt.forEach(extrow => {
-    var out = [`extend ${extrow[0]} {`];
-    extrow[1].forEach(ext => out.push(write_Field(ext)));
-    res.push(out.concat(`}`).join("\n") + (xtra ? "\n" : ""));
-  });
-  return res.join("\n");
-}
-
-
-interface ExtensionRange { start?: number; end?: number; }
-interface MessageType {
-  name?: string;
-  nestedType?: MessageType[];
-  enumType?: Enum[];
-  field?: Field[];
-  extension?: Field[];
-  extensionRange?: ExtensionRange[];
-}
-function parse_mtype(buf: Uint8Array): MessageType {
-  var data = parse_shallow(buf);
-  var out: MessageType = {};
-  if(data[1]?.[0]) out.name = u8str(data[1][0].data);
-  if(data[2]?.length >= 1) out.field = mappa(data[2], parse_Field);
-  if(data[3]?.length >= 1) out.nestedType = mappa(data[3], parse_mtype);
-  if(data[4]?.length >= 1) out.enumType = mappa(data[4], parse_Enum);
-  if(data[6]?.length >= 1) out.extension = mappa(data[6], parse_Field);
-  if(data[5]?.length >= 1) out.extensionRange = data[5].map(d => {
-    var data = parse_shallow(d.data);
-    var out: ExtensionRange = {};
-    if(data[1]?.[0]) out.start = varint_to_i32(data[1][0].data);
-    if(data[2]?.[0]) out.end   = varint_to_i32(data[2][0].data);
-    return out;
-  });
-  return out;
-}
-var write_mtype = (message: MessageType): string => {
-  var out = [ `message ${message.name} {` ];
-  message.nestedType?.forEach(m => out.push(indent(write_mtype(m), 1)));
-  message.enumType?.forEach(en => out.push(indent(write_Enum(en), 1)));
-  message.field?.forEach(field => out.push(write_Field(field)));
-  if(message.extensionRange) message.extensionRange.forEach(er => out.push(`  extensions ${er.start} to ${(er.end||0) - 1};`));
-  if(message.extension?.length) out.push(indent(write_extensions(message.extension), 1));
-  return out.concat(`}`).join("\n");
-};
-
-
-interface Descriptor {
-  name?: string;
-  package?: string;
-  dependency?: string[];
-  messageType?: MessageType[];
-  enumType?: Enum[];
-  extension?: Field[];
-  options?: FileOptions;
-}
-function parse_FileDescriptor(buf: Uint8Array): Descriptor {
-  var data = parse_shallow(buf);
-  var out: Descriptor = {};
-  if(data[1]?.[0]) out.name = u8str(data[1][0].data);
-  if(data[2]?.[0]) out.package = u8str(data[2][0].data);
-  if(data[3]?.[0]) out.dependency = data[3].map(x => u8str(x.data));
-
-  if(data[4]?.length >= 1) out.messageType = mappa(data[4], parse_mtype);
-  if(data[5]?.length >= 1) out.enumType = mappa(data[5], parse_Enum);
-  if(data[7]?.length >= 1) out.extension = mappa(data[7], parse_Field);
-
-  if(data[8]?.[0]) out.options = parse_FileOptions(data[8][0].data);
-
-  return out;
-}
-var write_FileDescriptor = (pb: Descriptor): string => {
-  var out = [
-    'syntax = "proto2";',
-    ''
-  ];
-  if(pb.dependency) pb.dependency.forEach((n: string) => { if(n) out.push(`import "${n}";`); });
-  if(pb.package) out.push(`package ${pb.package};\n`);
-  if(pb.options) {
-    var o = out.length;
-
-    if(pb.options.javaPackage) out.push(`option java_package = "${pb.options.javaPackage}";`);
-    if(pb.options.javaOuterClassname?.replace(/\W/g, "")) out.push(`option java_outer_classname = "${pb.options.javaOuterClassname}";`);
-    if(pb.options.javaMultipleFiles) out.push(`option java_multiple_files = true;`);
-    if(pb.options.goPackage) out.push(`option go_package = "${pb.options.goPackage}";`);
-
-    if(out.length > o) out.push('');
-  }
-
-  pb.enumType?.forEach(en => { if(en.name) out.push(write_Enum(en) + "\n"); });
-  pb.messageType?.forEach(m => { if(m.name) { var o = write_mtype(m); if(o) out.push(o + "\n"); }});
-
-  if(pb.extension?.length) {
-    var e = write_extensions(pb.extension, true, false);
-    if(e) out.push(e);
-  }
-  return out.join("\n") + "\n";
-};
-
-// #endregion
-
-// #region macho.ts
-
-interface MachOEntry {
-  type: number;
-  subtype: number;
-  offset: number;
-  size: number;
-  align?: number;
-  data: Uint8Array;
-}
-var parse_fat = (buf: Uint8Array): MachOEntry[] => {
-  var dv = u8_to_dataview(buf);
-  if(dv.getUint32(0, false) !== 0xCAFEBABE) throw new Error("Unsupported file");
-  var nfat_arch = dv.getUint32(4, false);
-  var out: MachOEntry[] = [];
-  for(var i = 0; i < nfat_arch; ++i) {
-    var start = i * 20 + 8;
-
-    var cputype = dv.getUint32(start, false);
-    var cpusubtype = dv.getUint32(start+4, false);
-    var offset = dv.getUint32(start+8, false);
-    var size = dv.getUint32(start+12, false);
-    var align = dv.getUint32(start+16, false);
-
-    out.push({
-      type: cputype,
-      subtype: cpusubtype,
-      offset,
-      size,
-      align,
-      data: buf.slice(offset, offset + size)
-    });
-  }
-  return out;
-};
-var parse_macho = (buf: Uint8Array): MachOEntry[] => {
-  var dv = u8_to_dataview(buf);
-  var magic = dv.getUint32(0, false);
-  switch(magic) {
-    // fat binary (x86_64 / aarch64)
-    case 0xCAFEBABE: return parse_fat(buf);
-    // x86_64
-    case 0xCFFAEDFE: return [{
-      type: dv.getUint32(4, false),
-      subtype: dv.getUint32(8, false),
-      offset: 0,
-      size: buf.length,
-      data: buf
-    }];
-  }
-  throw new Error("Unsupported file");
-};
-
-// #endregion
-
-// #region otorp.ts
-
-interface OtorpEntry {
-  name: string;
-  proto: string;
-}
-
-/** Find and stringify all relevant protobuf defs */
-function otorp(buf: Uint8Array, builtins = false): OtorpEntry[] {
-  var res = proto_offsets(buf);
-  var registry: {[key: string]: Descriptor} = {};
-  var names: Set<string> = new Set();
-  var out: OtorpEntry[] = [];
-
-  res.forEach((r, i) => {
-    if(!builtins && r[1].startsWith("google/protobuf/")) return;
-    var b = buf.slice(r[0], i < res.length - 1 ? res[i+1][0] : buf.length);
-    var pb = parse_FileDescriptorProto(b/*, r[1]*/);
-    names.add(r[1]);
-    registry[r[1]] = pb;
-  });
-
-  names.forEach(name => {
-    /* ensure partial ordering by dependencies */
-    names.delete(name);
-    var pb = registry[name];
-    var doit = (pb.dependency||[]).every((d: string) => !names.has(d));
-    if(!doit) { names.add(name); return; }
-
-    var dups = res.filter(r => r[1] == name);
-    if(dups.length == 1) return out.push({ name, proto: write_FileDescriptor(pb) });
-
-    /* in a fat binary, compare the defs for x86_64/aarch64 */
-    var pbs = dups.map(r => {
-      var i = res.indexOf(r);
-      var b = buf.slice(r[0], i < res.length - 1 ? res[i+1][0] : buf.length);
-      var pb = parse_FileDescriptorProto(b/*, r[1]*/);
-      return write_FileDescriptor(pb);
-    });
-    for(var l = 1; l < pbs.length; ++l) if(pbs[l] != pbs[0]) throw new Error(`Conflicting definitions for ${name} at offsets 0x${dups[0][0].toString(16)} and 0x${dups[l][0].toString(16)}`);
-    return out.push({ name, proto: pbs[0] });
-  });
-
-  return out;
-}
-export default otorp;
-
-/** Determine if an address is being referenced */
-var is_referenced = (buf: Uint8Array, pos: number): boolean => {
-  var dv = u8_to_dataview(buf);
-
-  /* Search for LEA reference (x86) */
-  for(var leaddr = 0; leaddr > -1 && leaddr < pos; leaddr = u8indexOf(buf, 0x8D, leaddr + 1))
-    if(dv.getUint32(leaddr + 2, true) == pos - leaddr - 6) return true;
-
-  /* Search for absolute reference to address */
-  try {
-    var headers = parse_macho(buf);
-    for(var i = 0; i < headers.length; ++i) {
-      if(pos < headers[i].offset || pos > headers[i].offset + headers[i].size) continue;
-      var b = headers[i].data;
-      var p = pos - headers[i].offset;
-      var ref = new Uint8Array([0,0,0,0,0,0,0,0]);
-      var dv = u8_to_dataview(ref);
-      dv.setUint32(0, p, true);
-      if(u8indexOf(b, ref, 0) > 0) return true;
-      ref[4] = 0x01;
-      if(u8indexOf(b, ref, 0) > 0) return true;
-      ref[4] = 0x00; ref[6] = 0x10;
-      if(u8indexOf(b, ref, 0) > 0) return true;
-    }
-  } catch(e) {throw e}
-  return false;
-};
-
-type OffsetList = Array<[number, string, number, number]>;
-/** Generate a list of potential starting points */
-var proto_offsets = (buf: Uint8Array): OffsetList => {
-  var meta = parse_macho(buf);
-  var out: OffsetList = [];
-  var off = 0;
-  /* note: this loop only works for names < 128 chars */
-  search: while((off = u8indexOf(buf, ".proto", off + 1)) > -1) {
-    var pos = off;
-    off += 6;
-    while(off - pos < 256 && buf[pos] != off - pos - 1) {
-      if(buf[pos] > 0x7F || buf[pos] < 0x20) continue search;
-      --pos;
-    }
-    if(off - pos > 250) continue;
-    var name = u8str(buf.slice(pos + 1, off));
-    if(buf[--pos] != 0x0A) continue;
-    if(!is_referenced(buf, pos)) { console.error(`Reference to ${name} at ${pos} not found`); continue; }
-    var bin = meta.find(m => m.offset <= pos && m.offset + m.size >= pos);
-    out.push([pos, name, bin?.type || -1, bin?.subtype || -1]);
-  }
-  return out;
-};
-
-/** Parse a descriptor that starts with the first byte of the supplied buffer */
-var parse_FileDescriptorProto = (buf: Uint8Array): Descriptor => {
-  var l = buf.length;
-  while(l > 0) try {
-    var b = buf.slice(0,l);
-    var o = parse_FileDescriptor(b);
-    return o;
-  } catch(e) {
-    var m = e.message.match(/at offset (\d+)/);
-    if(m && parseInt(m[1], 10) < buf.length) l = parseInt(m[1], 10) - 1;
-    else --l;
-  }
-  throw new RangeError("no protobuf message in range");
-};
-
-
-// #endregion
-
-let spin: TerminalSpinner;
-const width = Deno.consoleSize().columns;
-function process(inf: string, outf: string) {
-  const fi = Deno.statSync(inf);
-  if(fi.isDirectory) for(let info of Deno.readDirSync(inf)) {
-    if(spin) spin.set(inf.length > width - 4 ? "…" + inf.slice(-(width-4)) : inf);
-    process(inf + (inf.slice(-1) == "/" ? "" : "/") + info.name, outf);
-  }
-  try {
-    const buf: Uint8Array = Deno.readFileSync(inf);
-    var dv = u8_to_dataview(buf);
-    var magic = dv.getUint32(0, false);
-    if(![0xCAFEBABE, 0xCFFAEDFE].includes(magic)) return;
-
-    otorp(buf).forEach(({name, proto}) => {
-      if(!outf) return console.log(proto);
-      var pth = resolve(outf || "./", name.replace(/[/]/g, "$"));
-      try {
-        const str = Deno.readTextFileSync(pth);
-        if(str == proto) return;
-        throw `${pth} definition diverges!`;
-      } catch(e) { if(typeof e == "string") throw e; }
-      console.error(`writing ${name} to ${pth}`);
-      Deno.writeTextFileSync(pth, proto);
-    });
-  } catch(e) {}
-}
-
-function doit() {
-  const [ inf, outf ] = Deno.args;
-  if(!inf || inf == "-h" || inf == "--help") {
-    console.log(`usage: otorp.ts <path/to/bin> [output/folder]
-
-if no output folder specified, log all discovered defs
-if output folder specified, attempt to write defs in the folder
-
-$ otorp.ts /Applications/Numbers.app out/                   # search all files
-$ otorp.ts /Applications/Numbers.app/Contents/MacOS/Numbers # search one file
-`);
-    Deno.exit(1);
-  }
-  if(Deno.statSync(inf).isDirectory) (spin = new TerminalSpinner("")).start();
-  if(outf) try { Deno.mkdirSync(outf, { recursive: true }); } catch(e) {}
-  process(inf, outf);
-  if(spin) spin.stop();
-}
-doit();
--- a/test.js
+++ b/test.js
@ -13,8 +13,10 @@ declare var before:(test:EmptyFunc)=>void;
 declare var afterEach:(test:EmptyFunc)=>void;
 declare var cptable: any;
 */
-var X = require("./"), XLSX_ZAHL = require("./dist/xlsx.zahl");
+var X, XLSX_ZAHL;
+var modp = './';
 var fs = require('fs'), assert = require('assert');
+describe('source',function(){it('should load',function(){X=require(modp);});});
 var DIF_XL = true;

 var browser = typeof document !== 'undefined';
@ -54,8 +56,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x/*:string*/)/*:string*/ { return x.substr(0,31); }

@ -396,6 +396,11 @@ function check_comments(wb) {

 describe('parse options', function() {
 	var html_cell_types = ['s'];
+	var bef = (function() {
+		X = require(modp);
+	});
+	if(typeof before != 'undefined') before(bef);
+	else it('before', bef);
 	describe('cell', function() {
 		it('XLSX should generate HTML by default', function() {
 			var wb = X.read(fs.readFileSync(paths.cstxlsx), {type:TYPE});
@ -743,6 +748,7 @@ describe('output formats', function() {
 		["prn",   false,   true]
 	];
 	function RT(T) {
+		if(!X) X = require(modp);
 		fmts.forEach(function(fmt) {
 			var wb = X.utils.book_new();
 			X.utils.book_append_sheet(wb, X.utils.aoa_to_sheet([['R',"\u2603"],["\u0BEE",2]]), "Sheet1");
@ -921,6 +927,7 @@ describe('parse features', function() {

 	describe('comments', function() {
 		if(fs.existsSync(paths.swcxlsx)) it('should have comment as part of cell properties', function(){
+			X = require(modp);
 			var sheet = 'Sheet1';
 			var wb1=X.read(fs.readFileSync(paths.swcxlsx), {type:TYPE});
 			var wb2=X.read(fs.readFileSync(paths.swcxlsb), {type:TYPE});
@ -1025,6 +1032,7 @@ describe('parse features', function() {
 	describe('column properties', function() {
 		var wbs = [], wbs_no_slk = [];
 		var bef = (function() {
+			X = require(modp);
 			wbs = CWPaths.map(function(n) { return X.read(fs.readFileSync(n), {type:TYPE, cellStyles:true}); });
 			wbs_no_slk = wbs.slice(0, 5);
 		});
@ -1067,6 +1075,7 @@ describe('parse features', function() {
 		var wbs = [], ols = [];
 		var ol = fs.existsSync(paths.olxls);
 		var bef = (function() {
+			X = require(modp);
 			wbs = RHPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, cellStyles:true}); });
 			/* */
 			if(!ol) return;
@ -1112,6 +1121,7 @@ describe('parse features', function() {
 	describe('merge cells',function() {
 		var wbs=[];
 		var bef = (function() {
+			X = require(modp);
 			wbs = MCPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE}); });
 		});
 		if(typeof before != 'undefined') before(bef);
@ -1130,6 +1140,7 @@ describe('parse features', function() {
 	describe('should find hyperlinks', function() {
 		var wb1, wb2;
 		var bef = (function() {
+			X = require(modp);
 			wb1 = HLPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, WTF:true}); });
 			wb2 = ILPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, WTF:true}); });
 		});
@ -1441,7 +1452,7 @@ describe('parse features', function() {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	].forEach(function(r) {
-		if(r == "numbers" && !can_write_numbers) return;
+		if(!XLSX_ZAHL) XLSX_ZAHL=require("./dist/xlsx.zahl");
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1469,6 +1480,7 @@ describe('write features', function() {
 			};
 			var ws;
 			var bef = (function() {
+				X = require(modp);
 				ws = X.utils.aoa_to_sheet([["a","b","c"],[1,2,3]]);
 			});
 			if(typeof before != 'undefined') before(bef);
@ -1546,22 +1558,6 @@ describe('write features', function() {
 		assert.equal(Name.Ref, "Sheet1!$A$1:$C$3");
 		assert.equal(wb2.Workbook.Names.length, wb3.Workbook.Names.length);
 	}); });
-	it('should handle non-string values for "s" cells', function() {[
-		"xlsx", "xlsb", "xls", "biff5", "biff2", "xlml", "numbers", "ods", "fods", "wk3", "csv", "txt", "sylk", "html", "dif", "dbf", "wk1", "rtf", "prn"
-	].forEach(function(fmt) {
-		if(fmt == "numbers" && !can_write_numbers) return;
-		var ws = X.utils.aoa_to_sheet([
-			["String", "123"],
-			["Number", 123],
-			["Boolean", true],
-			["Date", new Date()],
-		], { cellDates: true });
-		ws["B2"].t = ws["B3"].t = ws["B4"].t = "s"
-		var wb = X.utils.book_new();
-		X.utils.book_append_sheet(wb, ws, "Sheet1");
-		X.write(wb, {type: TYPE, bookType: fmt, bookSST: false, numbers:XLSX_ZAHL});
-		X.write(wb, {type: TYPE, bookType: fmt, bookSST: true, numbers:XLSX_ZAHL});
-	}); });
 });

 function seq(end/*:number*/, start/*:?number*/)/*:Array<number>*/ {
@ -1598,6 +1594,9 @@ function parseDate(str/*:string|Date*/)/*:Date*/ {
 var fixdate = browser ? parseDate("2014-02-19T14:30:00.000Z") : new Date("2014-02-19T14:30Z");

 describe('roundtrip features', function() {
+	var bef = (function() { X = require(modp); XLSX_ZAHL=require("./dist/xlsx.zahl"); });
+	if(typeof before != 'undefined') before(bef);
+	else it('before', bef);
 	describe('should preserve core properties', function() { [
 		['xls', paths.cpxls],
 		['xlml', paths.cpxml],
@ -1628,7 +1627,6 @@ describe('roundtrip features', function() {

 	describe('should preserve merge cells', function() {
 		["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"].forEach(function(f) { it(f, function() {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]['!merges'].map(X.utils.encode_range);
@ -1903,21 +1901,6 @@ describe('invalid files', function() {
 			wb.SheetNames.push(wb.SheetNames[0]);
 			assert.throws(function() { X.write(wb, {type:'binary'}); });
 		});
-		it('should fail if sheet name is not valid', function() {
-			var names = [
-				"", // cannot be blank
-				"abcdefghijklmnopqrstuvwxyz1234567890", // cannot exceed 31 chars
-				"'sheetjs", "sheetjs'", // cannot start or end with apostrophe
-				"History", // cannot be History
-				"Sheet:JS", "Sheet]JS", "Sheet[JS", "Sheet*JS", // bad characters
-				"Sheet?JS", "Sheet\\JS", "Sheet\/JS"
-			];
-			names.forEach(function(n) { assert.throws(function() {
-				var wb = { SheetNames: [n], Sheets: {} };
-				wb.Sheets[n] = X.utils.aoa_to_sheet([["SheetJS"]]);
-				X.write(wb, {type:"binary", bookType:"xlsx"});
-			}); });
-		});
 	});
 });

@ -2242,7 +2225,7 @@ describe('CSV', function() {
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2380,7 +2363,7 @@ describe('numbers', function() {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) it('should cap cols at 1000 (ALL)', function() {
+	it('should cap cols at 1000 (ALL)', function() {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2416,16 +2399,6 @@ describe('dbf', function() {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		].forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	if(!browser || typeof cptable !== 'undefined') it("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", function() {
-		[ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ].forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
 var JSDOM = null;
 // $FlowIgnore
--- a/test.mjs
+++ b/test.mjs
@ -58,8 +58,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Set !== "undefined" && typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x/*:string*/)/*:string*/ { return x.substr(0,31); }

@ -1445,7 +1443,6 @@ describe('parse features', function() {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	].forEach(function(r) {
-		if(r == "numbers" && !can_write_numbers) return;
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1616,7 +1613,6 @@ describe('roundtrip features', function() {

 	describe('should preserve merge cells', function() {
 		["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"].forEach(function(f) { it(f, function() {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]['!merges'].map(X.utils.encode_range);
@ -2208,14 +2204,14 @@ describe('CSV', function() {
 				["3a", "3 a", "3 a-1"],
 				["3b", "3 b", "3 b-1"],
 				["3p", "3 P", "3 p-1"]
-			];
+			]
 			var ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: true}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
 				assert.equal(get_cell(ws, "A" + (R+1)).v, aoa[R][0]);
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2353,7 +2349,7 @@ describe('numbers', function() {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) it('should cap cols at 1000 (ALL)', function() {
+	it('should cap cols at 1000 (ALL)', function() {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2389,16 +2385,6 @@ describe('dbf', function() {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		].forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	if(!browser || typeof cptable !== 'undefined') it("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", function() {
-		[ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ].forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
 import { JSDOM } from 'jsdom';
 var domtest = true;
--- a/test.mts
+++ b/test.mts
@ -78,8 +78,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Set !== "undefined" && typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x: string): string { return x.substr(0,31); }

@ -1410,7 +1408,6 @@ describe('parse features', function() {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	] as X.BookType[]).forEach(function(r: X.BookType) {
-		if(r == "numbers" && !can_write_numbers) return;
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1576,7 +1573,6 @@ describe('roundtrip features', function() {

 	describe('should preserve merge cells', function() {
 		var mcf = ["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"] as Array<X.BookType>; for(let mci = 0; mci < mcf.length; ++mci) { let f = mcf[mci]; it(f, function() {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]?.['!merges']?.map(X.utils.encode_range);
@ -2164,14 +2160,14 @@ describe('CSV', function() {
 				["3a", "3 a", "3 a-1"],
 				["3b", "3 b", "3 b-1"],
 				["3p", "3 P", "3 p-1"],
-			];
+			]
 			var ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: true}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
 				assert.equal(get_cell(ws, "A" + (R+1)).v, aoa[R][0]);
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2299,7 +2295,7 @@ describe('numbers', function() {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) it('should cap cols at 1000 (ALL)', function() {
+	it('should cap cols at 1000 (ALL)', function() {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2330,18 +2326,8 @@ describe('dbf', function() {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		] as Array<[string, string, any]>).forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	it("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", function() {
-		([ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ] as Array<[number,string]>).forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
-const JSDOM = false; //import { JSDOM } from 'jsdom'; // breaks in latest deno
+import { JSDOM } from 'jsdom';
 var domtest = false; // error: Error: Not implemented: isContext
 var inserted_dom_elements = [];

@ -2354,7 +2340,6 @@ function get_dom_element(html: string) {
 		return domelt.children[0];
 	}
 	if(!JSDOM) throw new Error("Browser test fail");
-  // @ts-ignore
 	return new JSDOM(html).window.document.body.children[0];
 }

--- a/test.ts
+++ b/test.ts
@ -78,8 +78,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Set !== "undefined" && typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x: string): string { return x.substr(0,31); }

@ -1410,7 +1408,6 @@ Deno.test('parse features', async function(t) {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	] as X.BookType[]).forEach(function(r: X.BookType) {
-		if(r == "numbers" && !can_write_numbers) return;
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1576,7 +1573,6 @@ Deno.test('roundtrip features', async function(t) {

 	await t.step('should preserve merge cells', async function(t) {
 		var mcf = ["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"] as Array<X.BookType>; for(let mci = 0; mci < mcf.length; ++mci) { let f = mcf[mci]; await t.step(f, async function(t) {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]?.['!merges']?.map(X.utils.encode_range);
@ -2164,14 +2160,14 @@ Deno.test('CSV', async function(t) {
 				["3a", "3 a", "3 a-1"],
 				["3b", "3 b", "3 b-1"],
 				["3p", "3 P", "3 p-1"],
-			];
+			]
 			var ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: true}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
 				assert.equal(get_cell(ws, "A" + (R+1)).v, aoa[R][0]);
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2299,7 +2295,7 @@ Deno.test('numbers', async function(t) {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) await t.step('should cap cols at 1000 (ALL)', async function(t) {
+	await t.step('should cap cols at 1000 (ALL)', async function(t) {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2330,18 +2326,8 @@ Deno.test('dbf', async function(t) {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		] as Array<[string, string, any]>).forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	await t.step("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", async function(t) {
-		([ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ] as Array<[number,string]>).forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
-const JSDOM = false; //import { JSDOM } from 'jsdom'; // breaks in latest deno
+import { JSDOM } from 'jsdom';
 var domtest = false; // error: Error: Not implemented: isContext
 var inserted_dom_elements = [];

@ -2354,7 +2340,6 @@ function get_dom_element(html: string) {
 		return domelt.children[0];
 	}
 	if(!JSDOM) throw new Error("Browser test fail");
-  // @ts-ignore
 	return new JSDOM(html).window.document.body.children[0];
 }

--- a/2
+++ b/2
@ -1 +1 @@
-Subproject commit 1ea05a3eee0a746c102dea42e729b31e4ebfca35
+Subproject commit f91c73f99ccb7919b7992e720f9ba7a730071770
--- a/testnocp.ts
+++ b/testnocp.ts
@ -77,8 +77,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Set !== "undefined" && typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x: string): string { return x.substr(0,31); }

@ -1409,7 +1407,6 @@ Deno.test('parse features', async function(t) {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	] as X.BookType[]).forEach(function(r: X.BookType) {
-		if(r == "numbers" && !can_write_numbers) return;
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1575,7 +1572,6 @@ Deno.test('roundtrip features', async function(t) {

 	await t.step('should preserve merge cells', async function(t) {
 		var mcf = ["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"] as Array<X.BookType>; for(let mci = 0; mci < mcf.length; ++mci) { let f = mcf[mci]; await t.step(f, async function(t) {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]?.['!merges']?.map(X.utils.encode_range);
@ -2163,14 +2159,14 @@ Deno.test('CSV', async function(t) {
 				["3a", "3 a", "3 a-1"],
 				["3b", "3 b", "3 b-1"],
 				["3p", "3 P", "3 p-1"],
-			];
+			]
 			var ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: true}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
 				assert.equal(get_cell(ws, "A" + (R+1)).v, aoa[R][0]);
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2298,7 +2294,7 @@ Deno.test('numbers', async function(t) {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) await t.step('should cap cols at 1000 (ALL)', async function(t) {
+	await t.step('should cap cols at 1000 (ALL)', async function(t) {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2329,18 +2325,8 @@ Deno.test('dbf', async function(t) {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		] as Array<[string, string, any]>).forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	if(false) await t.step("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", async function(t) {
-		([ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ] as Array<[number,string]>).forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
-const JSDOM = false; //import { JSDOM } from 'jsdom'; // breaks in latest deno
+import { JSDOM } from 'jsdom';
 var domtest = false; // error: Error: Not implemented: isContext
 var inserted_dom_elements = [];

@ -2353,7 +2339,6 @@ function get_dom_element(html: string) {
 		return domelt.children[0];
 	}
 	if(!JSDOM) throw new Error("Browser test fail");
-  // @ts-ignore
 	return new JSDOM(html).window.document.body.children[0];
 }

--- a/tests/core.js
+++ b/tests/core.js
@ -13,8 +13,10 @@ declare var before:(test:EmptyFunc)=>void;
 declare var afterEach:(test:EmptyFunc)=>void;
 declare var cptable: any;
 */
-var X = require("./"), XLSX_ZAHL = require("./dist/xlsx.zahl");
+var X, XLSX_ZAHL = XLSX_ZAHL_PAYLOAD;
+var modp = './';
 var fs = require('fs'), assert = require('assert');
+describe('source',function(){it('should load',function(){X=require(modp);});});
 var DIF_XL = true;

 var browser = typeof document !== 'undefined';
@ -25,7 +27,7 @@ var Buffer_from = /*::(*/function(){}/*:: :any)*/;

 if(typeof Buffer !== 'undefined') {
 	var nbfs = !Buffer.from;
-	if(!nbfs) try { Buffer.from("foo", "utf-8"); } catch(e) { nbfs = true; }
+	if(!nbfs) try { Buffer.from("foo", "utf8"); } catch(e) { nbfs = true; }
 	Buffer_from = nbfs ? function(buf, enc) { return (enc) ? new Buffer(buf, enc) : new Buffer(buf); } : Buffer.from.bind(Buffer);
 	// $FlowIgnore
 	if(!Buffer.alloc) Buffer.alloc = function(n) { return new Buffer(n); };
@ -54,8 +56,6 @@ if(!browser) {
 	for(var _fileAi = 0; _fileAi < _fileA.length; ++_fileAi) if(test_file(_fileA[_fileAi])) fileA.push(_fileA[_fileAi]);
 }

-var can_write_numbers = typeof Array.prototype.findIndex == "function" && typeof Uint8Array !== "undefined" && typeof Uint8Array.prototype.indexOf == "function";
-
 /* Excel enforces 31 character sheet limit, although technical file limit is 255 */
 function fixsheetname(x/*:string*/)/*:string*/ { return x.substr(0,31); }

@ -396,6 +396,11 @@ function check_comments(wb) {

 describe('parse options', function() {
 	var html_cell_types = ['s'];
+	var bef = (function() {
+		X = require(modp);
+	});
+	if(typeof before != 'undefined') before(bef);
+	else it('before', bef);
 	describe('cell', function() {
 		it('XLSX should generate HTML by default', function() {
 			var wb = X.read(fs.readFileSync(paths.cstxlsx), {type:TYPE});
@ -743,6 +748,7 @@ describe('output formats', function() {
 		["prn",   false,   true]
 	];
 	function RT(T) {
+		if(!X) X = require(modp);
 		fmts.forEach(function(fmt) {
 			var wb = X.utils.book_new();
 			X.utils.book_append_sheet(wb, X.utils.aoa_to_sheet([['R',"\u2603"],["\u0BEE",2]]), "Sheet1");
@ -921,6 +927,7 @@ describe('parse features', function() {

 	describe('comments', function() {
 		if(fs.existsSync(paths.swcxlsx)) it('should have comment as part of cell properties', function(){
+			X = require(modp);
 			var sheet = 'Sheet1';
 			var wb1=X.read(fs.readFileSync(paths.swcxlsx), {type:TYPE});
 			var wb2=X.read(fs.readFileSync(paths.swcxlsb), {type:TYPE});
@ -1025,6 +1032,7 @@ describe('parse features', function() {
 	describe('column properties', function() {
 		var wbs = [], wbs_no_slk = [];
 		var bef = (function() {
+			X = require(modp);
 			wbs = CWPaths.map(function(n) { return X.read(fs.readFileSync(n), {type:TYPE, cellStyles:true}); });
 			wbs_no_slk = wbs.slice(0, 5);
 		});
@ -1067,6 +1075,7 @@ describe('parse features', function() {
 		var wbs = [], ols = [];
 		var ol = fs.existsSync(paths.olxls);
 		var bef = (function() {
+			X = require(modp);
 			wbs = RHPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, cellStyles:true}); });
 			/* */
 			if(!ol) return;
@ -1112,6 +1121,7 @@ describe('parse features', function() {
 	describe('merge cells',function() {
 		var wbs=[];
 		var bef = (function() {
+			X = require(modp);
 			wbs = MCPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE}); });
 		});
 		if(typeof before != 'undefined') before(bef);
@ -1130,6 +1140,7 @@ describe('parse features', function() {
 	describe('should find hyperlinks', function() {
 		var wb1, wb2;
 		var bef = (function() {
+			X = require(modp);
 			wb1 = HLPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, WTF:true}); });
 			wb2 = ILPaths.map(function(p) { return X.read(fs.readFileSync(p), {type:TYPE, WTF:true}); });
 		});
@ -1441,7 +1452,6 @@ describe('parse features', function() {
 		// TODO: keep in sync with BookType, support other formats
 		"xlsx"/*, "xlsm" */, "xlsb"/* xls / xla / biff# */, "xlml", "ods", "fods"/*, "csv", "txt", */, "sylk", "html", "dif", "rtf"/*, "prn", "eth"*/, "dbf", "numbers"
 	].forEach(function(r) {
-		if(r == "numbers" && !can_write_numbers) return;
 		var ws = X.utils.aoa_to_sheet([ ["a", "b", "c"], [1, 2, 3] ]);
 		var wb = X.utils.book_new(); X.utils.book_append_sheet(wb, ws, "Sheet1");
 		var data = X.write(wb, {type: TYPE, bookType: r, WTF: true, numbers:XLSX_ZAHL });
@ -1469,6 +1479,7 @@ describe('write features', function() {
 			};
 			var ws;
 			var bef = (function() {
+				X = require(modp);
 				ws = X.utils.aoa_to_sheet([["a","b","c"],[1,2,3]]);
 			});
 			if(typeof before != 'undefined') before(bef);
@ -1546,22 +1557,6 @@ describe('write features', function() {
 		assert.equal(Name.Ref, "Sheet1!$A$1:$C$3");
 		assert.equal(wb2.Workbook.Names.length, wb3.Workbook.Names.length);
 	}); });
-	it('should handle non-string values for "s" cells', function() {[
-		"xlsx", "xlsb", "xls", "biff5", "biff2", "xlml", "numbers", "ods", "fods", "wk3", "csv", "txt", "sylk", "html", "dif", "dbf", "wk1", "rtf", "prn"
-	].forEach(function(fmt) {
-		if(fmt == "numbers" && !can_write_numbers) return;
-		var ws = X.utils.aoa_to_sheet([
-			["String", "123"],
-			["Number", 123],
-			["Boolean", true],
-			["Date", new Date()],
-		], { cellDates: true });
-		ws["B2"].t = ws["B3"].t = ws["B4"].t = "s"
-		var wb = X.utils.book_new();
-		X.utils.book_append_sheet(wb, ws, "Sheet1");
-		X.write(wb, {type: TYPE, bookType: fmt, bookSST: false, numbers:XLSX_ZAHL});
-		X.write(wb, {type: TYPE, bookType: fmt, bookSST: true, numbers:XLSX_ZAHL});
-	}); });
 });

 function seq(end/*:number*/, start/*:?number*/)/*:Array<number>*/ {
@ -1598,6 +1593,9 @@ function parseDate(str/*:string|Date*/)/*:Date*/ {
 var fixdate = browser ? parseDate("2014-02-19T14:30:00.000Z") : new Date("2014-02-19T14:30Z");

 describe('roundtrip features', function() {
+	var bef = (function() { X = require(modp); XLSX_ZAHL=require("./dist/xlsx.zahl"); });
+	if(typeof before != 'undefined') before(bef);
+	else it('before', bef);
 	describe('should preserve core properties', function() { [
 		['xls', paths.cpxls],
 		['xlml', paths.cpxml],
@ -1628,7 +1626,6 @@ describe('roundtrip features', function() {

 	describe('should preserve merge cells', function() {
 		["xlsx", "xlsb", "xlml", "ods", "biff8", "numbers"].forEach(function(f) { it(f, function() {
-			if(f == "numbers" && !can_write_numbers) return;
 			var wb1 = X.read(fs.readFileSync(paths.mcxlsx), {type:TYPE});
 			var wb2 = X.read(X.write(wb1,{bookType:f,type:'binary',numbers:XLSX_ZAHL}),{type:'binary'});
 			var m1 = wb1.Sheets["Merge"]['!merges'].map(X.utils.encode_range);
@ -1903,21 +1900,6 @@ describe('invalid files', function() {
 			wb.SheetNames.push(wb.SheetNames[0]);
 			assert.throws(function() { X.write(wb, {type:'binary'}); });
 		});
-		it('should fail if sheet name is not valid', function() {
-			var names = [
-				"", // cannot be blank
-				"abcdefghijklmnopqrstuvwxyz1234567890", // cannot exceed 31 chars
-				"'sheetjs", "sheetjs'", // cannot start or end with apostrophe
-				"History", // cannot be History
-				"Sheet:JS", "Sheet]JS", "Sheet[JS", "Sheet*JS", // bad characters
-				"Sheet?JS", "Sheet\\JS", "Sheet\/JS"
-			];
-			names.forEach(function(n) { assert.throws(function() {
-				var wb = { SheetNames: [n], Sheets: {} };
-				wb.Sheets[n] = X.utils.aoa_to_sheet([["SheetJS"]]);
-				X.write(wb, {type:"binary", bookType:"xlsx"});
-			}); });
-		});
 	});
 });

@ -2142,7 +2124,7 @@ function plaintext_test(wb, raw) {
 	var sheet = wb.Sheets[wb.SheetNames[0]];
 	plaintext_val.forEach(function(x) {
 		var cell = get_cell(sheet, x[0]);
-		var tcval = x[2+(raw ? 1 : 0)];
+		var tcval = x[2+(!!raw ? 1 : 0)];
 		var type = raw ? 's' : x[1];
 		if(x.length == 1) { if(cell) { assert.equal(cell.t, 'z'); assert.ok(!cell.v); } return; }
 		assert.equal(cell.v, tcval); assert.equal(cell.t, type);
@ -2235,14 +2217,14 @@ describe('CSV', function() {
 				["3a", "3 a", "3 a-1"],
 				["3b", "3 b", "3 b-1"],
 				["3p", "3 P", "3 p-1"]
-			];
+			]
 			var ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: true}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
 				assert.equal(get_cell(ws, "A" + (R+1)).v, aoa[R][0]);
 				assert.equal(get_cell(ws, "C" + (R+1)).v, aoa[R][2]);
 			}
 			assert.equal(get_cell(ws, "B2").v, "3 b");
-			var B1 = get_cell(ws, "B1"); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
+			var B1 = get_cell(ws, "B1"); console.log(B1); assert.equal(B1.t, "d"); assert.equal(B1.v.getHours(), 3);
 			var B3 = get_cell(ws, "B3"); assert.equal(B3.t, "d"); assert.equal(B3.v.getHours(), 15);
 			ws = X.read(aoa.map(function(row) { return row.join(","); }).join("\n"), {type: "string", cellDates: false}).Sheets.Sheet1;
 			for(var R = 0; R < 3; ++R) {
@ -2380,7 +2362,7 @@ describe('numbers', function() {
 		assert.equal(get_cell(ws, "B11").v, true);
 		assert.equal(get_cell(ws, "B13").v, 50);
 	});
-	if(can_write_numbers) it('should cap cols at 1000 (ALL)', function() {
+	it('should cap cols at 1000 (ALL)', function() {
 		var aoa = [[1], [], []]; aoa[1][999] = 2; aoa[2][1000] = 3;
 		var ws1 = X.utils.aoa_to_sheet(aoa);
 		var wb1 = X.utils.book_new(); X.utils.book_append_sheet(wb1, ws1, "Sheet1");
@ -2416,16 +2398,6 @@ describe('dbf', function() {
 			["I2", "v", true], ["L2", "v", "SheetJS"]
 		].forEach(function(r) { assert.equal(get_cell(ws, r[0])[r[1]], r[2]); });
 	});
-	if(!browser || typeof cptable !== 'undefined') it("Ś╫êëτ⌡ś and Š╫ěéτ⌡š", function() {
-		[ [620, "Ś╫êëτ⌡ś"], [895, "Š╫ěéτ⌡š"] ].forEach(function(r) {
-			var book = X.utils.book_new();
-			var sheet = X.utils.aoa_to_sheet([["ASCII", "encoded"], ["Test", r[1]]]);
-			X.utils.book_append_sheet(book, sheet, "sheet1");
-			var data = X.write(book, {type: TYPE, bookType: "dbf", codepage:r[0]});
-			var wb = X.read(data, {type: TYPE});
-			assert.equal(wb.Sheets.Sheet1.B2.v, r[1]);
-		});
-	});
 });
 var JSDOM = null;
 // $FlowIgnore
--- a/types/index.d.ts
+++ b/types/index.d.ts
@ -14,9 +14,9 @@ export const SSF: any;
 // export { CFB };
 export const CFB: any;

-/** Set internal `fs` instance */
+/** ESM ONLY! Set internal `fs` instance */
 export function set_fs(fs: any): void;
-/** Set internal codepage tables */
+/** ESM ONLY! Set internal codepage tables */
 export function set_cptable(cptable: any): void;

 /** NODE ONLY! Attempts to read filename and parse */
@ -144,15 +144,7 @@ export interface ParsingOptions extends CommonOptions {
    /** Input data encoding */
    type?: 'base64' | 'binary' | 'buffer' | 'file' | 'array' | 'string';

-    /**
-     * Default codepage for legacy files
-     *
-     * This requires encoding support to be loaded.  It is automatically loaded
-     * in `xlsx.full.min.js` and in CommonJS / Extendscript, but an extra step
-     * is required in React / Angular / Webpack ESM deployments.
-     *
-     * Check the relevant guide https://docs.sheetjs.com/docs/getting-started/
-     */
+    /** Default codepage */
    codepage?: number;

    /**
@ -221,27 +213,24 @@ export interface ParsingOptions extends CommonOptions {
    /** If true, plaintext parsing will not parse values */
    raw?: boolean;

-    /** If true, ignore "dimensions" records and guess range using every cell */
-    nodim?: boolean;
-
    /** If true, preserve _xlfn. prefixes in formula function names */
    xlfn?: boolean;

-    /** If true, generate dense-mode worksheets */
    dense?: boolean;

-    /**
-     * For single-sheet formats (including CSV), override the worksheet name
-     * @default "Sheet1"
-     */
-    sheet?: string;
-
    PRN?: boolean;
 }

+export interface SheetOption {
+  /**
+   * Name of Worksheet (for single-sheet formats)
+   * @default ''
+   */
+  sheet?: string;
+}

 /** Options for write and writeFile */
-export interface WritingOptions extends CommonOptions {
+export interface WritingOptions extends CommonOptions, SheetOption {
    /** Output data encoding */
    type?: 'base64' | 'binary' | 'buffer' | 'file' | 'array' | 'string';

@ -272,28 +261,8 @@ export interface WritingOptions extends CommonOptions {
    /** Override workbook properties on save */
    Props?: Properties;

-    /**
-     * Desired codepage for legacy file formats
-     *
-     * This requires encoding support to be loaded.  It is automatically loaded
-     * in `xlsx.full.min.js` and in CommonJS / Extendscript, but an extra step
-     * is required in React / Angular / Webpack / ESM deployments.
-     *
-     * Check the relevant guide https://docs.sheetjs.com/docs/getting-started/
-     */
-    codepage?: number;
-
    /** Base64 encoding of NUMBERS base for exports */
    numbers?: string;
-
-    /**
-     * For single-sheet formats, export the specified worksheet.
-     *
-     * The property must be a string (sheet name) or number (`SheetNames` index).
-     *
-     * If this option is omitted, the first worksheet will be exported.
-     */
-    sheet?: string | number;
 }

 /** Workbook Object */
@ -548,52 +517,20 @@ export type SheetKeys = string | MarginInfo | SheetType;
 /** General object representing a Sheet (worksheet or chartsheet) */
 export interface Sheet {
    /**
-     * Sparse-mode store cells with keys corresponding to A1-style address
-     * Dense-mode  store cells in the '!data' key
+     * Indexing with a cell address string maps to a cell object
     * Special keys start with '!'
     */
-    [cell: string]: CellObject | CellObject[][] | SheetKeys | any;
-
-    /**
-     * Dense-mode worksheets store data in an array of arrays
-     *
-     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
-     */
-    '!data'?: CellObject[][];
+    [cell: string]: CellObject | SheetKeys | any;

    /** Sheet type */
    '!type'?: SheetType;

-    /** Sheet Range (A1-style) */
+    /** Sheet Range */
    '!ref'?: string;

    /** Page Margins */
    '!margins'?: MarginInfo;
 }
-/** General object representing a dense Sheet (worksheet or chartsheet) */
-export interface DenseSheet extends Sheet {
-    /**
-     * Special keys start with '!'
-     * Dense-mode worksheets store data in the '!data' key
-     */
-    [cell: string]: CellObject[][] | SheetKeys | any;
-
-    /**
-     * Dense-mode worksheets store data in an array of arrays
-     *
-     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
-     */
-    '!data': CellObject[][];
-}
-/** General object representing a sparse Sheet (worksheet or chartsheet) */
-export interface SparseSheet extends Sheet {
-    /**
-     * Sparse-mode store cells with keys corresponding to A1-style address
-     * Cells are accessed with sheet[addr]
-     */
-    '!data': never;
-}
-

 /** AutoFilter properties */
 export interface AutoFilterInfo {
@ -626,15 +563,6 @@ export interface WorkSheet extends Sheet {
    /** AutoFilter info */
    '!autofilter'?: AutoFilterInfo;
 }
-/** Dense Worksheet Object */
-export interface DenseWorkSheet extends DenseSheet {
-    /**
-     * Dense-mode worksheets store data in an array of arrays
-     *
-     * Cells are accessed with sheet['!data'][R][C] (where R and C are 0-indexed)
-     */
-    '!data': CellObject[][];
-}

 /**
 * Worksheet Object with CellObject type
@ -702,9 +630,6 @@ export interface CellObject {
    /** Range of enclosing array if formula is array formula (if applicable) */
    F?: string;

-    /** If true, cell is a dynamic array formula (for supported file formats) */
-    D?: boolean;
-
    /** Rich text encoding (if applicable) */
    r?: any;

@ -815,7 +740,7 @@ export interface AOA2SheetOpts extends CommonOptions, DateNFOption {

 export interface SheetAOAOpts extends AOA2SheetOpts, OriginOption {}

-export interface JSON2SheetOpts extends CommonOptions, DateNFOption, OriginOption {
+export interface JSON2SheetOpts extends CommonOptions, DateNFOption {
    /** Use specified column order */
    header?: string[];

@ -823,7 +748,9 @@ export interface JSON2SheetOpts extends CommonOptions, DateNFOption, OriginOptio
    skipHeader?: boolean;
 }

-export interface Table2SheetOpts extends CommonOptions, DateNFOption, OriginOption {
+export interface SheetJSONOpts extends JSON2SheetOpts, OriginOption {}
+
+export interface Table2SheetOpts extends CommonOptions, DateNFOption, OriginOption, SheetOption {
    /** If true, plaintext parsing will not parse values */
    raw?: boolean;

@ -835,20 +762,6 @@ export interface Table2SheetOpts extends CommonOptions, DateNFOption, OriginOpti

    /** If true, hidden rows and cells will not be parsed */
    display?: boolean;
-
-    /**
-     * Override the worksheet name
-     * @default "Sheet1"
-     */
-    sheet?: string;
-}
-
-export interface Table2BookOpts extends Table2SheetOpts {
-    /**
-     * Override the worksheet name
-     * @default "Sheet1"
-     */
-     sheet?: string;
 }

 /** General utilities */
@ -865,7 +778,7 @@ export interface XLSX$Utils {

    /** BROWSER ONLY! Converts a TABLE DOM element to a worksheet. */
    table_to_sheet(data: any,  opts?: Table2SheetOpts): WorkSheet;
-    table_to_book(data: any,  opts?: Table2BookOpts): WorkBook;
+    table_to_book(data: any,  opts?: Table2SheetOpts): WorkBook;
    sheet_add_dom(ws: WorkSheet, data: any, opts?: Table2SheetOpts): WorkSheet;

    /* --- Export Functions --- */
@ -957,8 +870,8 @@ export interface XLSX$Utils {
    sheet_add_aoa(ws: WorkSheet, data: any[][], opts?: SheetAOAOpts): WorkSheet;

    /** Add an array of JS objects to a worksheet */
-    sheet_add_json(ws: WorkSheet, data: any[], opts?: JSON2SheetOpts): WorkSheet;
-    sheet_add_json<T>(ws: WorkSheet, data: T[], opts?: JSON2SheetOpts): WorkSheet;
+    sheet_add_json(ws: WorkSheet, data: any[], opts?: SheetJSONOpts): WorkSheet;
+    sheet_add_json<T>(ws: WorkSheet, data: T[], opts?: SheetJSONOpts): WorkSheet;


    consts: XLSX$Consts;
--- a/xlsx.flow.js
+++ b/xlsx.flow.js
--- a/xlsx.js
+++ b/xlsx.js
--- a/xlsx.mini.flow.js
+++ b/xlsx.mini.flow.js
--- a/xlsx.mini.js
+++ b/xlsx.mini.js
--- a/xlsx.mjs
+++ b/xlsx.mjs