parse self-closing text:p uof:文本串 (fixes #2927 )

Export NaN/Infinity to error cells (fixes #2897 )
version bump 0.19.3
2023-04-30 03:57:30 -04:00 · 2023-04-23 03:58:36 -04:00 · 2023-04-17 23:39:28 -04:00 · 2023-04-14 03:51:02 -04:00 · 2023-04-12 03:48:54 -04:00 · 2023-04-10 01:15:44 -04:00
117 changed files with 11430 additions and 6428 deletions
--- a/.eslintrc
+++ b/.eslintrc
@ -11,6 +11,7 @@
 		"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
@ -0,0 +1,6 @@
+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/.gitignore
+++ b/.gitignore
@ -14,6 +14,7 @@ tmp
 *.[pP][mM][dD]*
 *.[pP][dD][fF]
 *.[sS][lL][kK]
+*.[sS][yY][lL][kK]
 *.socialcalc
 *.[xX][lL][sSwWcCaAtTmMrR]
 *.[xX][lL][sSaAtT][xXmMbB]
--- a/.gitmodules
+++ b/.gitmodules
@ -1,3 +1,4 @@
 [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
@ -54,6 +54,7 @@ Rollup
 SessionStorage
 SQLite
 SystemJS
+Vite
 VueJS
 WebKit
 WebSQL
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -4,6 +4,44 @@ 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.

+* Export `NaN` values to `#NUM!` and infinite values to `#DIV/0!`
+
+## v0.19.3
+
+* XLSX Ensure comment address is valid (h/t @slonser)
+* Enforce Excel worksheet name restrictions
+* Fixed "Prototype Pollution" vulnerability (CVE-2023-30533)
+
+## 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
@ -21,7 +59,7 @@ 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
@ -113,6 +113,7 @@ 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
@ -148,16 +149,16 @@ 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: hotcross.mjs ## Run Bun test suite
+test-bun: testbun.mjs ## Run Bun test suite
 	bun $<

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

 TESTFMT=$(patsubst %,test_%,$(FMT))
 .PHONY: $(TESTFMT)
--- a/README.md
+++ b/README.md
@ -9,13 +9,7 @@ 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)
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/sheetjs?pixel)](https://git.sheetjs.com/SheetJS/sheetjs)

 [![Build Status](https://saucelabs.com/browser-matrix/sheetjs.svg)](https://saucelabs.com/u/sheetjs)

@ -35,9 +29,9 @@ port calculations to web apps; automate common spreadsheet tasks, and much more!

 - [`test_files`](https://github.com/SheetJS/test_files): Sample spreadsheets

- [`cfb`](https://github.com/SheetJS/js-cfb): Container (OLE/ZIP) format library
+- [`cfb`](https://git.sheetjs.com/SheetJS/js-cfb): Container (OLE/ZIP) format library

- [`codepage`](https://github.com/SheetJS/js-codepage): Legacy text encodings
+- [`codepage`](https://git.sheetjs.com/SheetJS/js-codepage): Legacy text encodings

 ## License

--- a/bits/01_version.js
+++ b/bits/01_version.js
@ -1 +1 @@
-XLSX.version = '0.18.10';
+XLSX.version = '0.19.3';
--- a/bits/02_codepage.js
+++ b/bits/02_codepage.js
@ -41,6 +41,11 @@ 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") { throw "wtf"; }
+			else if(typeof bufs[i] == "string") o.set(new Uint8Array(s2a(bufs[i])), maxlen);
 			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' ? 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' && typeof table.subarray == "function" ? 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);

-sector_list[dir_start].name = "!Directory";
+if(dir_start < sector_list.length) 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] = CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);
+		crcs[fcnt] = typeof fi.content == "string" ? CRC32.bstr(fi.content, 0) : CRC32.buf(/*::((*/fi.content/*::||[]):any)*/, 0);

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

 		/* local file header */
--- a/bits/23_binutils.js
+++ b/bits/23_binutils.js
@ -181,21 +181,29 @@ 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') {
+	} else if(f === 'sbcs' || f == 'cpstr') {
 		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 cppayload = $cptable.utils.encode(current_ansi, val.charAt(i));
-				this[this.l + i] = cppayload[0];
+				var cpp = $cptable.utils.encode(current_ansi, val.charAt(i));
+				this[this.l + i] = cpp[0];
 			}
+			size = val.length;
+		} else if(typeof $cptable !== 'undefined' && f == 'cpstr') {
+			cpp = $cptable.utils.encode(current_codepage, val);
+			/* replace null bytes with _ when relevant */
+      if(cpp.length == val.length) for(i = 0; i < val.length; ++i) if(cpp[i] == 0 && val.charCodeAt(i) != 0) cpp[i] = 0x5F;
+      if(cpp.length == 2 * val.length) for(i = 0; i < val.length; ++i) if(cpp[2*i] == 0 && cpp[2*i+1] == 0 && val.charCodeAt(i) != 0) cpp[2*i] = 0x5F;
+			for(i = 0; i < cpp.length; ++i) this[this.l + i] = cpp[i];
+			size = cpp.length;
 		} else {
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			val = val.replace(/[^\x00-\x7F]/g, "_");
 			/*:: if(typeof val !== 'string') throw new Error("unreachable"); */
 			for(i = 0; i != val.length; ++i) this[this.l + i] = (val.charCodeAt(i) & 0xFF);
+			size = val.length;
 		}
-		size = val.length;
 	} else if(f === 'hex') {
 		for(; i < t; ++i) {
 			/*:: if(typeof val !== "string") throw new Error("unreachable"); */
--- a/bits/27_csfutils.js
+++ b/bits/27_csfutils.js
@ -9,7 +9,6 @@ function fix_col(cstr/*:string*/)/*:string*/ { return cstr.replace(/^([A-Z])/,"$
 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) {
@ -19,7 +18,6 @@ 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="";
@ -112,9 +110,10 @@ 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 ? Array.isArray(_ws) : o.dense;
+	var dense = _ws ? (_ws["!data"] != null) : o.dense;
 	if(DENSE != null && dense == null) dense = DENSE;
-	var ws/*:Worksheet*/ = _ws || (dense ? ([]/*:any*/) : ({}/*:any*/));
+	var ws/*:Worksheet*/ = _ws || ({}/*:any*/);
+	if(dense && !ws["!data"]) ws["!data"] = [];
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -133,13 +132,19 @@ 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 __R = _R + R, __C = _C + C;
+			var __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;
@ -163,11 +168,10 @@ function sheet_add_aoa(_ws/*:?Worksheet*/, data/*:AOA*/, opts/*:?any*/)/*:Worksh
 				else cell.t = 's';
 			}
 			if(dense) {
-				if(!ws[__R]) ws[__R] = [];
-				if(ws[__R][__C] && ws[__R][__C].z) cell.z = ws[__R][__C].z;
-				ws[__R][__C] = cell;
+				if(row[__C] && row[__C].z) cell.z = row[__C].z;
+				row[__C] = cell;
 			} else {
-				var cell_ref = encode_cell(({c:__C,r:__R}/*:any*/));
+				var cell_ref = encode_col(__C) + __Rstr/*:any*/;
 				if(ws[cell_ref] && ws[cell_ref].z) cell.z = ws[cell_ref].z;
 				ws[cell_ref] = cell;
 			}
--- 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 = y.Target; rel.Id = y.Id; if(y.TargetMode) rel.TargetMode = y.TargetMode;
+			var rel = {}; rel.Type = y.Type; rel.Target = unescapexml(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
@ -1,62 +1,61 @@
-/* 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; // 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;
-	}
+  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/*: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_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("");
 }
-
-/* 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_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/*: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_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("");
+  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("");
 }
-/* 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>';
+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/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.push(FtTab[ft](blob, tgt - blob.l));
+			fts[ft] = 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");
@ -696,9 +696,11 @@ function parse_Lbl(blob, length, opts) {
 	};
 }

-/* [MS-XLS] 2.4.106 TODO: verify filename encoding */
+/* [MS-XLS] 2.4.106 TODO: legacy record 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
@ -1,4 +1,3 @@
-/* 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 = {
@ -239,14 +238,14 @@ 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();
@ -282,7 +281,8 @@ function sheet_to_dbf(ws/*:Worksheet*/, opts/*:WriteOpts*/) {
 				case 'object': _guess = col[j] instanceof Date ? 'D' : 'C'; break;
 				default: _guess = 'C';
 			}
-			maxlen = Math.max(maxlen, String(col[j]).length);
+			/* 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);
 			guess = guess && guess != _guess ? 'C' : _guess;
 			//if(guess == 'C') break;
 		}
@ -308,11 +308,17 @@ 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);
-	h.write_shift(4, 0x00000000 | ((+dbf_reverse_map[/*::String(*/current_ansi/*::)*/] || 0x03)<<8));
+	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;
+	}

 	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");
@ -341,6 +347,7 @@ 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;
@ -352,13 +359,16 @@ 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, "sbcs");
-					for(hcnt=0; hcnt < colwidths[j]-_s.length; ++hcnt) rout.write_shift(1, 0x20); break;
+					rout.write_shift(1, _s, "cpstr");
+					_l += colwidths[j] - rout.l;
+					for(hcnt=0; hcnt < _l; ++hcnt) rout.write_shift(1, 0x20); break;
 			}
 		}
 		// data
 	}
+	current_codepage = old_cp;
 	ba.next(1).write_shift(1, 0x1A);
 	return ba.end();
 }
@ -569,7 +579,7 @@ 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.replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
+			case 's': o += '"' + (cell.v == null ? "" : String(cell.v)).replace(/"/g,"").replace(/;/g, ";;") + '"'; break;
 		}
 		return o;
 	}
@ -598,9 +608,10 @@ 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 = Array.isArray(ws);
+		var dense = ws["!data"] != null;
 		var RS = "\r\n";
 		var d1904 = (((wb||{}).Workbook||{}).WBProps||{}).date1904;

@ -612,10 +623,10 @@ 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) {
-				var coord = encode_cell({r:R,c:C});
-				cell = dense ? (ws[R]||[])[C]: ws[coord];
+				cell = dense ? ws["!data"][R][C] : ws[encode_col(C) + encode_row(R)];
 				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
 			}
@ -683,62 +694,55 @@ var DIF = /*#__PURE__*/(function() {
 		return o;
 	}

-	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, "");
-					}
+	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\"\"");
 				}
+				p += "\r\n";
 			}
-			push_value(o, -1, 0, "EOD");
-			var RS = "\r\n";
-			var oo = o.join(RS);
-			//while((oo.length & 0x7F) != 0) oo += "\0";
-			return oo;
-		};
-	})();
+			o.push(p);
+		}
+		return o.join("") + "-1,0\r\nEOD";
+	}
 	return {
 		to_workbook: dif_to_workbook,
 		to_sheet: dif_to_sheet,
@ -801,11 +805,11 @@ 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 = Array.isArray(ws);
+		var dense = ws["!data"] != null;
 		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[R]||[])[C] : ws[coord];
+				cell = dense ? (ws["!data"][R]||[])[C] : ws[coord];
 				if(!cell || cell.v == null || cell.t === 'z') continue;
 				oo = ["cell", coord, 't'];
 				switch(cell.t) {
@ -927,7 +931,8 @@ var PRN = /*#__PURE__*/(function() {
 		var o = opts || {};
 		var sep = "";
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var ws/*:Worksheet*/ = o.dense ? ([]/*:any*/) : ({}/*:any*/);
+		var ws/*:Worksheet*/ = ({}/*:any*/);
+		if(o.dense) ws["!data"] = [];
 		var range/*:Range*/ = ({s: {c:0, r:0}, e: {c:0, r:0}}/*:any*/);

 		if(str.slice(0,4) == "sep=") {
@ -973,7 +978,7 @@ var PRN = /*#__PURE__*/(function() {
 				cell.v = s;
 			}
 			if(cell.t == 'z'){}
-			else if(o.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = cell; }
+			else if(o.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][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;
@ -1029,12 +1034,12 @@ 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 = Array.isArray(ws);
+		var dense = ws["!data"] != null;
 		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[R]||[])[C] : ws[coord];
+				cell = dense ? (ws["!data"][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
@ -28,8 +28,9 @@ var WK_ = /*#__PURE__*/(function() {
 		if(!d) return d;
 		var o = opts || {};
 		if(DENSE != null && o.dense == null) o.dense = DENSE;
-		var s/*:Worksheet*/ = ((o.dense ? [] : {})/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
-		var sheets = {}, snames = [], realnames = [];
+		var s/*:Worksheet*/ = ({}/*:any*/), n = "Sheet1", next_n = "", sidx = 0;
+		var sheets = {}, snames = [], realnames = [], sdata = [];
+		if(o.dense) sdata = s["!data"] = [];

 		var refguess = {s: {r:0, c:0}, e: {r:0, c:0} };
 		var sheetRows = o.sheetRows || 0;
@ -74,13 +75,13 @@ var WK_ = /*#__PURE__*/(function() {
 							s["!ref"] = encode_range(refguess);
 							sheets[n] = s;
 							snames.push(n);
-							s = (o.dense ? [] : {});
+							s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
 							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 ? (s[val[0].r]||[])[val[0].c] : s[encode_cell(val[0])];
+					var tmpcell = o.dense ? (sdata[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;
@ -88,8 +89,8 @@ var WK_ = /*#__PURE__*/(function() {
 						break;
 					}
 					if(o.dense) {
-						if(!s[val[0].r]) s[val[0].r] = [];
-						s[val[0].r][val[0].c] = val[1];
+						if(!sdata[val[0].r]) sdata[val[0].r] = [];
+						sdata[val[0].r][val[0].c] = val[1];
 					} else s[encode_cell(val[0])] = val[1];
 					break;
 				case 0x5405: o.works2 = true; break;
@ -115,14 +116,14 @@ var WK_ = /*#__PURE__*/(function() {
 						s["!ref"] = encode_range(refguess);
 						sheets[n] = s;
 						snames.push(n);
-						s = (o.dense ? [] : {});
+						s = ({}/*:any*/); if(o.dense) sdata = s["!data"] = [];
 						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(!s[val[0].r]) s[val[0].r] = [];
-						s[val[0].r][val[0].c] = val[1];
+						if(!sdata[val[0].r]) sdata[val[0].r] = [];
+						sdata[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;
@ -157,18 +158,17 @@ 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 = Array.isArray(ws);
+		var dense = ws["!data"] != null;
 		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(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];
+			for(C = range.s.c; C <= range.e.c; ++C) {
+				var cell = dense ? (ws["!data"][R]||[])[C] : ws[cols[C] + rr];
 				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 = Array.isArray(ws);
+			var dense = ws["!data"] != null;
 			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[R]||[])[C] : ws[ref];
+					var cell = dense ? (ws["!data"][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*/ = ((o.dense ? [] : {})/*:any*/);
+		var s/*:Worksheet*/ = ({}/*:any*/); if(o.dense) s["!data"] = [];
 		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 = ((o.dense ? [] : {})/*:any*/);
+					s = ({}/*:any*/); if(o.dense) s["!data"] = [];
 					range.s.c = p.read_shift(2);
 					range.e.c = p.read_shift(2);
 					range.s.r = p.read_shift(4);
@ -993,6 +993,7 @@ 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);
@ -1015,10 +1016,10 @@ var WK_ = /*#__PURE__*/(function() {
 							default: throw "Unsupported delta for QPW cell type " + (flags & 0x1F);
 						}
 						if(!(!o.sheetStubs && cell.t == "z")) {
-							if(Array.isArray(s)) {
-								if(!s[R]) s[R] = [];
-								s[R][C] = cell;
-							} else s[encode_cell({r:R, c:C})] = cell;
+							if(s["!data"] != null) {
+								if(!s["!data"][R]) s["!data"][R] = [];
+								s["!data"][R][C] = cell;
+							} else s[CC + encode_row(R)] = cell;
 						}
 						++R; --cnt;
 						while(mul-- > 0 && cnt >= 0) {
@ -1034,10 +1035,10 @@ var WK_ = /*#__PURE__*/(function() {
 								default: throw "Cannot apply repeat for QPW cell type " + (flags & 0x1F);
 							}
 							if(!(!o.sheetStubs && cell.t == "z")) {
-								if(Array.isArray(s)) {
-									if(!s[R]) s[R] = [];
-									s[R][C] = cell;
-								} else s[encode_cell({r:R, c:C})] = cell;
+								if(s["!data"] != null) {
+									if(!s["!data"][R]) s["!data"][R] = [];
+									s["!data"][R][C] = cell;
+								} else s[CC + encode_row(R)] = 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>/;
+var sitregex = /<(?:\w+:)?t[^>]*>([^<]*)<\/(?:\w+:)?t>/g, sirregex = /<(?:\w+:)?r\b[^>]*>/;
 var sirphregex = /<(?:\w+:)?rPh.*?>([\s\S]*?)<\/(?:\w+:)?rPh>/g;
 function parse_si(x, opts) {
 	var html = opts ? opts.cellHTML : true;
@ -229,6 +229,7 @@ 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
@ -13,14 +13,18 @@ function rtf_to_sheet(d, opts) {
 }
 function rtf_to_sheet_str(str, opts) {
  var o = opts || {};
-  var ws = o.dense ? [] : {};
+  var ws = {};
+  var dense = o.dense;
+  if (dense)
+    ws["!data"] = [];
  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 (Array.isArray(ws))
-      ws[R] = [];
+    if (dense)
+      row = ws["!data"][R] = [];
    var rtfre = /\\[\w\-]+\b/g;
    var last_index = 0;
    var res;
@ -46,8 +50,8 @@ function rtf_to_sheet_str(str, opts) {
                cell.w = cell.v;
              cell.v = fuzzynum(cell.v);
            }
-            if (Array.isArray(ws))
-              ws[R][C] = cell;
+            if (dense)
+              row[C] = cell;
            else
              ws[encode_cell({ r: R, c: C })] = cell;
          }
@ -75,15 +79,17 @@ function sheet_to_rtf(ws, opts) {
  if (!ws["!ref"])
    return o[0] + "}";
  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = Array.isArray(ws);
+  var dense = ws["!data"] != null, row = [];
  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 ? (ws[R] || [])[C] : ws[coord];
+      cell = dense ? row[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.WTF)
+        if (!pass && (opts == null ? void 0 : opts.WTF))
          throw new Error("unrecognized " + y[0] + " in metadata");
    }
    return x;
--- a/bits/56_cmntcommon.js
+++ b/bits/56_cmntcommon.js
@ -1,15 +1,16 @@
-function sheet_insert_comments(sheet, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
-	var dense = Array.isArray(sheet);
+function sheet_insert_comments(sheet/*:WorkSheet*/, comments/*:Array<RawComment>*/, threaded/*:boolean*/, people/*:?Array<any>*/) {
+	var dense = sheet["!data"] != null;
 	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[r.r]) sheet[r.r] = [];
-			cell = sheet[r.r][r.c];
+			if(!sheet["!data"][r.r]) sheet["!data"][r.r] = [];
+			cell = sheet["!data"][r.r][r.c];
 		} else cell = sheet[comment.ref];
 		if (!cell) {
 			cell = ({t:"z"}/*:any*/);
-			if(dense) sheet[r.r][r.c] = cell;
+			if(dense) sheet["!data"][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;
@ -17,7 +18,7 @@ function sheet_insert_comments(sheet, comments/*:Array<RawComment>*/, threaded/*
 			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);
-			if (encoded !== sheet["!ref"]) sheet["!ref"] = encoded;
+			sheet["!ref"] = encoded;
 		}

 		if (!cell.c) cell.c = [];
@ -35,4 +36,3 @@ function sheet_insert_comments(sheet, comments/*:Array<RawComment>*/, threaded/*
 		cell.c.push(o);
 	});
 }
-
--- a/bits/57_cmntxml.js
+++ b/bits/57_cmntxml.js
@ -50,21 +50,27 @@ function write_comments_xml(data/*::, opts*/) {
 	o.push("<commentList>");
 	data.forEach(function(d) {
 		/* 18.7.3 CT_Comment */
-		var lastauthor = 0, ts = [];
+		var lastauthor = 0, ts = [], tcnt = 0;
 		if(d[1][0] && d[1][0].T && d[1][0].ID) lastauthor = iauthor.indexOf("tc=" + d[1][0].ID);
-		else d[1].forEach(function(c) {
+		d[1].forEach(function(c) {
 			if(c.a) lastauthor = iauthor.indexOf(escapexml(c.a));
-			ts.push(c.t||"");
+			if(c.T) ++tcnt;
+			ts.push(c.t == null ? "" : escapexml(c.t));
 		});
-		o.push('<comment ref="' + d[0] + '" authorId="' + lastauthor + '"><text>');
-		if(ts.length <= 1) o.push(writetag("t", escapexml(ts[0]||"")));
-		else {
+		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 {
 			/* 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 = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
+	var s = ({}/*:any*/); if(opts.dense) s["!data"] = [];
 	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) parse_ws_xml_dim(s, ref[1]);
+		if(ref && !(opts && opts.nodim)) parse_ws_xml_dim(s, ref[1]);
 	}

 	/* 18.3.1.88 sheetViews CT_SheetViews */
@ -75,6 +75,7 @@ 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"]);
@ -149,7 +150,7 @@ function write_ws_xml_protection(sp)/*:string*/ {
 }

 function parse_ws_xml_hlinks(s, data/*:Array<string>*/, rels) {
-	var dense = Array.isArray(s);
+	var dense = s["!data"] != null;
 	for(var i = 0; i != data.length; ++i) {
 		var val = parsexmltag(utf8read(data[i]), true);
 		if(!val.ref) return;
@ -165,11 +166,11 @@ 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_cell({c:C,r:R});
+			var addr = encode_col(C) + encode_row(R);
 			if(dense) {
-				if(!s[R]) s[R] = [];
-				if(!s[R][C]) s[R][C] = {t:"z",v:undefined};
-				s[R][C].l = val;
+				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;
 			} else {
 				if(!s[addr]) s[addr] = {t:"z",v:undefined};
 				s[addr].l = val;
@ -263,7 +264,10 @@ 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': vv = ''+cell.v; 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 'e': vv = BErr[cell.v]; break;
 		case 'd':
 			if(opts && opts.cellDates) vv = parseDate(cell.v, -1).toISOString();
@ -299,7 +303,10 @@ 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) ws['!links'].push([ref, cell.l]);
+	if(cell.l) {
+		cell.l.display = escapexml(vv);
+		ws['!links'].push([ref, cell.l]);
+	}
 	if(cell.D) o.cm = 1;
 	return writextag('c', v, o);
 }
@ -318,7 +325,7 @@ 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 = Array.isArray(s);
+	var dense = s["!data"] != null;
 	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) {
@ -349,8 +356,10 @@ 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(guess.s.r > tagr - 1) guess.s.r = tagr - 1;
-		if(guess.e.r < tagr - 1) guess.e.r = tagr - 1;
+		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(opts && opts.cellStyles) {
 			rowobj = {}; rowrite = false;
@ -481,10 +490,16 @@ 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) {
-				var _r = decode_cell(tag.r);
-				if(!s[_r.r]) s[_r.r] = [];
-				s[_r.r][_r.c] = p;
+				_r = decode_cell(tag.r);
+				if(!s["!data"][_r.r]) s["!data"][_r.r] = [];
+				s["!data"][_r.r][_r.c] = p;
 			} else s[tag.r] = p;
 		}
 	}
@ -493,7 +508,7 @@ 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 = Array.isArray(ws);
+	var dense = ws["!data"] != null;
 	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) {
@ -501,7 +516,7 @@ 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[R]||[])[C]: ws[ref];
+			var _cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
 			if(_cell === undefined) continue;
 			if((cell = write_ws_xml_cell(_cell, ref, ws, opts, idx, wb)) != null) r.push(cell);
 		}
@ -609,6 +624,7 @@ 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
@ -41,12 +41,13 @@ 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 = Array.isArray(ws) ? (ws[caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
+			var cell = dense ? (ws["!data"][caddr.r]||[])[caddr.c] : ws[encode_cell(caddr)];
 			if(cell) { if(first < 0) first = j; last = j; }
 		}
 		if(first < 0) continue;
@ -258,9 +259,10 @@ 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(cell.v, o);
+	write_XLWideString(data, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }
 function parse_BrtShortSt(data) {
@ -269,9 +271,10 @@ function parse_BrtShortSt(data) {
 	return [cell, value, 'str'];
 }
 function write_BrtShortSt(cell, ncell, o) {
-	if(o == null) o = new_buf(8 + 4 * cell.v.length);
+	var data = cell.v == null ? "" : String(cell.v);
+	if(o == null) o = new_buf(8 + 4 * data.length);
 	write_XLSBShortCell(ncell, o);
-	write_XLWideString(cell.v, o);
+	write_XLWideString(data, o);
 	return o.length > o.l ? o.slice(0, o.l) : o;
 }

@ -508,7 +511,7 @@ 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*/ = (opts.dense ? [] : {});
+	var s/*:Worksheet*/ = ({}); if(opts.dense) s["!data"] = [];

 	var ref;
 	var refguess = {s: {r:2000000, c:2000000}, e: {r:0, c:0} };
@ -584,7 +587,7 @@ 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[R]) s[R] = []; s[R][C] = p; }
+				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][R][C] = p; }
 				else s[encode_col(C) + rr] = p;
 				if(opts.cellFormula) {
 					af = false;
@ -617,7 +620,7 @@ 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[R]) s[R] = []; s[R][C] = p; }
+				if(opts.dense) { if(!s["!data"][R]) s["!data"][R] = []; s["!data"][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;
@ -648,11 +651,11 @@ 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[R]) s[R] = [];
-						if(!s[R][C]) s[R][C] = {t:'z',v:undefined};
-						s[R][C].l = val;
+						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;
 					} else {
-						addr = encode_cell({c:C,r:R});
+						addr = encode_col(C) + encode_row(R);
 						if(!s[addr]) s[addr] = {t:'z',v:undefined};
 						s[addr].l = val;
 					}
@ -662,14 +665,14 @@ 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[R][C] : s[encode_col(C) + rr])/*:any*/);
+				cell = ((opts.dense ? s["!data"][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[R][C] : s[encode_col(C) + rr]);
+				cell = (opts.dense ? s["!data"][R][C] : s[encode_col(C) + rr]);
 				cell.f = stringify_formula(val[1], refguess, {r:row.r, c:C}, supbooks, opts);
 				break;

@ -824,7 +827,7 @@ 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/*:any*/), opts.revStrings);
+				vv = get_sst_id(opts.Strings, (cell.v == null ? "" : String(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));
@ -839,6 +842,12 @@ 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));
@ -862,7 +871,7 @@ 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 = Array.isArray(ws);
+	var dense = ws["!data"] != null;
 	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) {
@ -875,7 +884,7 @@ 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[R]||[])[C] : ws[ref];
+			var cell = dense ? (ws["!data"][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
@ -34,7 +34,10 @@ 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) {
-			cs[col + encode_row(i)] = {t:'n', v:n, z:cache[1] };
+			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] };
 			R = i;
 		});
 		if(refguess.e.r < R) refguess.e.r = R;
--- a/bits/71_wbcommon.js
+++ b/bits/71_wbcommon.js
@ -115,14 +115,17 @@ function safe1904(wb/*:Workbook*/)/*:string*/ {

 var badchars = /*#__PURE__*/":][*?\/\\".split("");
 function check_ws_name(n/*:string*/, safe/*:?boolean*/)/*:boolean*/ {
-	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;
+	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;
 }
 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*/ = (opts.dense ? [] : {}), sheetname = "";
+	var sheets = {}, sheetnames/*:Array<string>*/ = [], cursheet/*:Worksheet*/ = ({}), sheetname = ""; if(opts.dense) cursheet["!data"] = [];
 	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[r]) cursheet[r] = [];
-						cursheet[r][c] = cell;
+						if(!cursheet["!data"][r]) cursheet["!data"][r] = [];
+						cursheet["!data"][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[cmd]) cursheet[cmd] = [];
-									cursheet[cmd][cma] = {t:'z'};
+									if(!cursheet["!data"][cmd]) cursheet["!data"][cmd] = [];
+									cursheet["!data"][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 = (opts.dense ? [] : {});
+				cursheet = ({}); if(opts.dense) cursheet["!data"] = [];
 				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 = Array.isArray(ws);
+	var dense = ws["!data"] != null;
 	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_cell(addr), cell = dense ? (ws[R]||[])[C] : ws[ref];
+			var ref = encode_col(C) + encode_row(R), cell = dense ? (ws["!data"][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*/ = ((options.dense ? [] : {})/*:any*/);
+	var out/*:Worksheet*/ = ({}/*:any*/); if(options.dense) out["!data"] = [];
 	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[cell.r]) out[cell.r] = [];
-				out[cell.r][cell.c] = line;
+				if(!out["!data"][cell.r]) out["!data"][cell.r] = [];
+				out["!data"][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 = ((options.dense ? [] : {})/*:any*/);
+					out = ({}/*:any*/); if(options.dense) out["!data"] = [];
 				} 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 = ((options.dense ? [] : {})/*:any*/);
+					out = ({}/*:any*/); if(options.dense) out["!data"] = [];

 					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[val.r]||[])[val.c]: out[encode_cell({c:val.c, r:val.r})]) ++val.c;
+					if(out["!type"] == "chart") if(options.dense ? (out["!data"][val.r]||[])[val.c]: out[encode_col(val.c) + encode_row(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[_fr]||[])[_fc]: out[_fe]) || {}).F;
+							else temp_val.F = ((options.dense ? (out["!data"][_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[val[0].s.r]||[])[val[0].s.c] : out[_arraystart];
+					cc = options.dense ? (out["!data"][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[last_formula.cell.r]||[])[last_formula.cell.c] : out[encode_cell(last_formula.cell)];
+						cc = options.dense ? (out["!data"][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[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out["!data"][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[rngR]||[])[rngC] : out[encode_cell({c:rngC,r:rngR})];
+							cc = options.dense ? (out["!data"][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[val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
+					cc = options.dense ? (out["!data"][val[0].r]||[])[val[0].c] : out[encode_cell(val[0])];
 					var noteobj = objects[val[2]];
 					if(!cc) {
 						if(options.dense) {
-							if(!out[val[0].r]) out[val[0].r] = [];
-							cc = out[val[0].r][val[0].c] = ({t:"z"}/*:any*/);
+							if(!out["!data"][val[0].r]) out["!data"][val[0].r] = [];
+							cc = out["!data"][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
@ -62,33 +62,37 @@ 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||"").slice(0,255)));
+			write_biff_rec(ba, 0x0004, write_BIFF2LABEL(R, C, cell.v == null ? "" : String(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 = Array.isArray(ws);
+	var dense = ws["!data"] != null;
 	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(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];
+		for(C = range.s.c; C <= range.e.c; ++C) {
+			var cell = dense ? row[C] : ws[cols[C] + rr];
 			if(!cell) continue;
 			/* write cell */
 			write_ws_biff2_cell(ba, cell, R, C, opts);
@ -99,7 +103,6 @@ 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;
@ -183,8 +186,10 @@ 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 */
-			write_biff_rec(ba, 0x0203 /* Number */, write_Number(R, C, v, os, opts));
+			else 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));
@ -192,9 +197,9 @@ 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, opts.revStrings);
+				var isst = get_sst_id(opts.Strings, cell.v == null ? "" : String(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||"").slice(0,255), os, opts));
+			} else write_biff_rec(ba, 0x0204 /* Label */, write_Label(R, C, (cell.v == null ? "" : String(cell.v)).slice(0,255), os, opts));
 			break;
 		default:
 			write_biff_rec(ba, 0x0201 /* Blank */, write_XLSCell(R, C, os));
@ -207,7 +212,7 @@ 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 = Array.isArray(ws);
+	var dense = ws["!data"] != null;
 	var b8 = opts.biff == 8;
 	var ref/*:string*/, rr = "", cols/*:Array<string>*/ = [];
 	var range = safe_decode_range(ws['!ref'] || "A1");
@ -243,12 +248,14 @@ 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(var C = range.s.c; C <= range.e.c; ++C) {
-			if(R === range.s.r) cols[C] = encode_col(C);
+		for(C = range.s.c; C <= range.e.c; ++C) {
 			ref = cols[C] + rr;
-			var cell = dense ? (ws[R]||[])[C] : ws[ref];
+			var cell = dense ? row[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 || {};
-	if(DENSE != null && opts.dense == null) opts.dense = DENSE;
-	var ws/*:Worksheet*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
+	var dense = (opts.dense != null) ? opts.dense : DENSE;
+	var ws/*:Worksheet*/ = ({}/*:any*/); if(dense) ws["!data"] = [];
 	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(opts.dense) { if(!ws[R]) ws[R] = []; ws[R][C] = o; }
+			if(dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][R][C] = o; }
 			else ws[encode_cell({r:R, c:C})] = o;
 			C += CS;
 		}
@ -61,6 +61,7 @@ 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) {
@ -70,8 +71,8 @@ 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_cell({r:R,c:C});
-		var cell = o.dense ? (ws[R]||[])[C] : ws[coord];
+		var coord = encode_col(C) + encode_row(R);
+		var cell = dense ? (ws["!data"][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*/);
@ -82,7 +83,7 @@ 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="' + cell.l.Target +'">' + w + '</a>';
+			if(cell.l && (cell.l.Target || "#").charAt(0) != "#") w = '<a href="' + escapehtml(cell.l.Target) +'">' + w + '</a>';
 		}
 		sp.id = (o.id || "sjs") + "-" + coord;
 		oo.push(writextag('td', w, sp));
@ -119,7 +120,6 @@ 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 || {};
-	if(DENSE != null) opts.dense = DENSE;
+	var dense = ws["!data"] != null;
 	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(opts.dense) { if(!ws[R + or_R]) ws[R + or_R] = []; ws[R + or_R][C + or_C] = o; }
+			if(dense) { if(!ws["!data"][R + or_R]) ws["!data"][R + or_R] = []; ws["!data"][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*/ = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
+	var ws/*:Worksheet*/ = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
 	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 = opts.dense ? ([]/*:any*/) : ({}/*:any*/);
+		var ws = ({}/*:any*/); if(opts.dense) ws["!data"] = [];
 		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 = opts.dense ? ([]/*:any*/) : ({}/*:any*/); merges = [];
+					ws = ({}/*:any*/); if(opts.dense) ws["!data"] = []; 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[R]) ws[R] = []; ws[R][C] = {t:'z'}; }
+					if(opts.dense) { if(!ws["!data"][R]) ws["!data"][R] = []; ws["!data"][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[R]) ws[R] = [];
-							ws[R][C] = q;
+							if(!ws["!data"][R]) ws["!data"][R] = [];
+							ws["!data"][R][C] = q;
 						} else {
-							ws[encode_cell({r:R,c:C})] = q;
+							ws[encode_col(C) + encode_row(R)] = 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[R + rpt]) ws[R + rpt] = [];
-									ws[R + rpt][C] = rpt == 0 ? q : dup(q);
-									while(--colpeat > 0) ws[R + rpt][C + colpeat] = dup(q);
+									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);
 								} else {
 									ws[encode_cell({r:R + rpt,c:C})] = q;
 									while(--colpeat > 0) ws[encode_cell({r:R + rpt,c:C + colpeat})] = dup(q);
@ -596,6 +596,9 @@ function parse_content_xml(d/*:string*/, _opts, _nfm)/*:Workbook*/ {
 				if(Rn[1]==='/' && (!ctag || !ctag['string-value'])) {
 					var ptp = parse_text_p(str.slice(textpidx,Rn.index), textptag);
 					textp = (textp.length > 0 ? textp + "\n" : "") + ptp[0];
+				} else if(Rn[0].slice(-2) == "/>") {
+					/* TODO: is self-closing 文本串 valid? */
+					textp += "\n";
 				} else { textptag = parsexmltag(Rn[0], false); textpidx = Rn.index + Rn[0].length; }
 				break; // <text:p>
 			case 's': break; // <text:s>
--- 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 = Array.isArray(ws);
+		var dense = ws["!data"] != null;
 		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[R]||[])[C]: ws[ref];
+				var ref = encode_cell({r:R, c:C}), cell = dense ? (ws["!data"][R]||[])[C]: ws[ref];
 				if(cell && cell.f) {
 					ct['table:formula'] = escapexml(csf_to_ods_formula(cell.f));
 					if(cell.F) {
@ -347,9 +347,10 @@ 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 = Array.isArray(ws) ? (ws[R]||[])[C] : ws[encode_cell({r:R,c:C})];
+				var c = dense ? (ws["!data"][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 tcomments = [];
+		var comments = [], 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);
-				var comments = parse_cmnt(getzipdata(zip, dfile, true), dfile, opts);
+				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
@ -101,7 +101,8 @@ function write_zip_xlsb(wb/*:Workbook*/, opts/*:WriteOpts*/)/*:ZIP*/ {
 	/* TODO: something more intelligent with themes */

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

--- a/bits/87_read.js
+++ b/bits/87_read.js
@ -50,7 +50,13 @@ 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);
-	d = typeof $cptable !== "undefined" ? $cptable.utils.decode(1200, d.slice(2), 'str') : utf16leread(d.slice(2));
+	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))
+	);
 	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>*/, dense/*:boolean*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
+function make_json_row(sheet/*:Worksheet*/, r/*:Range*/, R/*:number*/, cols/*:Array<string>*/, header/*:number*/, hdr/*:Array<any>*/, o/*:Sheet2JSONOpts*/)/*:MJRObject*/ {
 	var rr = encode_row(R);
 	var defval = o.defval, raw = o.raw || !Object.prototype.hasOwnProperty.call(o, "raw");
-	var isempty = true;
+	var isempty = true, dense = (sheet["!data"] != null);
 	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[R]) for (var C = r.s.c; C <= r.e.c; ++C) {
-		var val = dense ? sheet[R][C] : sheet[cols[C] + rr];
+	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(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 = Array.isArray(sheet);
+	var dense = sheet["!data"] != null;
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet[R]) sheet[R] = [];
+	if(dense && !sheet["!data"][R]) sheet["!data"][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[R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet["!data"][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, dense, o);
+		var row = make_json_row(sheet, r, R, cols, header, hdr, o);
 		if((row.isempty === false) || (header === 1 ? o.blankrows !== false : !!o.blankrows)) out[outi++] = row.row;
 	}
 	out.length = outi;
@ -102,9 +102,11 @@ 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 = o.dense ? (sheet[R]||[])[C]: sheet[cols[C] + rr];
+		var val = dense ? datarow[C]: sheet[cols[C] + rr];
 		if(val == null) txt = "";
 		else if(val.v != null) {
 			isempty = false;
@ -131,7 +133,6 @@ 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);
@ -143,7 +144,6 @@ 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 = Array.isArray(sheet);
+	var dense = sheet["!data"] != null;
 	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[R]||[])[C] : sheet[y];
+			x = dense ? (sheet["!data"][R]||[])[C] : sheet[y];
 			val = "";
 			if(x === undefined) continue;
 			else if(x.F != null) {
@ -191,10 +191,11 @@ 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 ? Array.isArray(_ws) : o.dense;
+	var dense = _ws ? (_ws["!data"] != null) : o.dense;
 	if(DENSE != null && dense == null) dense = DENSE;
 	var offset = +!o.skipHeader;
-	var ws/*:Worksheet*/ = _ws || (dense ? ([]/*:any*/) : ({}/*:any*/));
+	var ws/*:Worksheet*/ = _ws || ({});
+	if(!_ws && dense) ws["!data"] = [];
 	var _R = 0, _C = 0;
 	if(ws && o.origin != null) {
 		if(typeof o.origin == 'number') _R = o.origin;
@ -213,19 +214,20 @@ 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(!ws[_R + R + offset]) ws[_R + R + offset] = [];
-		var ROW = ws[_R + R + offset];
+		if(dense && !ws["!data"][_R + R + offset]) ws["!data"][_R + R + offset] = [];
+		if(dense) ROW = ws["!data"][_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_cell({c:_C + C,r:_R + R + offset});
+			var ref = dense ? "" : (encode_col(_C + C) + encode_row(_R + R + offset));
 			var cell/*:Cell*/ = dense ? ROW[_C + C] : ws[ref];
 			if(v && typeof v === 'object' && !(v instanceof Date)){
-				ws[ref] = v;
+				if(dense) ROW[_C + C] = v;
+				else ws[ref] = v;
 			} else {
 				if(typeof v == 'number') t = 'n';
 				else if(typeof v == 'boolean') t = 'b';
@ -239,8 +241,7 @@ 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;
@ -251,9 +252,9 @@ 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[_R]) ws[_R] = [];
+	if(dense && !ws["!data"][_R]) ws["!data"][_R] = [];
 	if(offset) for(C = 0; C < hdr.length; ++C) {
-		if(dense) ws[_R][C + _C] = {t:'s', v:hdr[C]};
+		if(dense) ws["!data"][_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);
@ -265,18 +266,17 @@ 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") {
-		/* dense */
-		if(Array.isArray(ws)) {
+		if(ws["!data"] != null) {
 			var RC = decode_cell(R);
-			if(!ws[RC.r]) ws[RC.r] = [];
-			return ws[RC.r][RC.c] || (ws[RC.r][RC.c] = {t:'z'});
+			if(!ws["!data"][RC.r]) ws["!data"][RC.r] = [];
+			return ws["!data"][RC.r][RC.c] || (ws["!data"][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_cell({r:R,c:C||0}));
+	return ws_get_cell_stub(ws, encode_col(C||0) + encode_row(R));
 }

 /* find sheet index for given name / validate index */
--- a/bits/97_node.js
+++ b/bits/97_node.js
@ -10,7 +10,6 @@ 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);
@ -40,7 +39,6 @@ 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;
@ -78,16 +76,16 @@ function write_json_stream(sheet/*:Worksheet*/, opts/*:?Sheet2CSVOpts*/) {
 	var rr = encode_row(r.s.r);
 	var cols/*:Array<string>*/ = [];
 	var counter = 0;
-	var dense = Array.isArray(sheet);
+	var dense = sheet["!data"] != null;
 	var R = r.s.r, C = 0;
 	var header_cnt = {};
-	if(dense && !sheet[R]) sheet[R] = [];
+	if(dense && !sheet["!data"][R]) sheet["!data"][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[R][C] : sheet[cols[C] + rr];
+		val = dense ? sheet["!data"][R][C] : sheet[cols[C] + rr];
 		switch(header) {
 			case 1: hdr[C] = C - r.s.c; break;
 			case 2: hdr[C] = cols[C]; break;
@ -108,7 +106,7 @@ 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, dense, o);
+			var row = make_json_row(sheet, r, R, cols, header, hdr, 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
@ -10,6 +10,8 @@ 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/README.md
+++ b/demos/README.md
@ -1,78 +0,0 @@
-# Demos
-
-These demos are intended to demonstrate how to load this library in various
-ecosystems.  The library is designed to be used in the web browser and in node
-contexts, using dynamic feature tests to pull in features when necessary.  This
-works extremely well in common use cases: script tag insertion and node require.
-
-Systems like webpack try to be clever by performing simple static analysis to
-pull in code.  However, they do not support dynamic type tests, breaking
-compatibility with traditional scripts.  Configuration is required.  The demos
-cover basic configuration steps for various systems and should "just work".
-
-Mobile app and other larger demos do not include the full build structure. The
-demos have `Makefile` scripts that show how to reproduce the full projects.  The
-scripts have been tested against iOS and OSX.  For Windows platforms, GNU make
-can be installed with Bash on Windows or with `cygwin`.
-
-### Included Demos
-
-**JavaScript APIs**
- [`XMLHttpRequest and fetch`](https://docs.sheetjs.com/docs/demos/network)
- [`Clipboard Data`](https://docs.sheetjs.com/docs/demos/clipboard)
- [`Typed Arrays for Machine Learning`](https://docs.sheetjs.com/docs/demos/ml)
- [`LocalStorage and SessionStorage`](https://docs.sheetjs.com/docs/demos/database#localstorage-and-sessionstorage)
- [`Web SQL Database`](https://docs.sheetjs.com/docs/demos/database#websql)
- [`IndexedDB`](https://docs.sheetjs.com/docs/demos/database#indexeddb)
-
-**Frameworks**
- [`Angular 2+ and Ionic`](https://docs.sheetjs.com/docs/demos/angular)
- [`React`](https://docs.sheetjs.com/docs/demos/react)
- [`VueJS`](https://docs.sheetjs.com/docs/demos/vue)
- [`Angular.JS`](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
- [`Knockout`](https://docs.sheetjs.com/docs/demos/legacy#knockoutjs)
-
-**Front-End UI Components**
- [`canvas-datagrid`](https://docs.sheetjs.com/docs/demos/grid#canvas-datagrid)
- [`x-spreadsheet`](https://docs.sheetjs.com/docs/demos/grid#x-spreadsheet)
- [`react-data-grid`](https://docs.sheetjs.com/docs/demos/grid#react-data-grid)
- [`vue3-table-lite`](https://docs.sheetjs.com/docs/demos/grid#vue3-table-lite)
- [`angular-ui-grid`](https://docs.sheetjs.com/docs/demos/grid#angular-ui-grid)
-
-**Platforms and Integrations**
- [`Command-Line Tools`](https://docs.sheetjs.com/docs/demos/cli)
- [`iOS and Android Mobile Applications`](https://docs.sheetjs.com/docs/demos/mobile)
- [`NodeJS Server-Side Processing`](https://docs.sheetjs.com/docs/demos/server#nodejs)
- [`Content Management and Static Sites`](https://docs.sheetjs.com/docs/demos/content)
- [`Electron`](https://docs.sheetjs.com/docs/demos/desktop#electron)
- [`NW.js`](https://docs.sheetjs.com/docs/demos/desktop#nwjs)
- [`Tauri`](https://docs.sheetjs.com/docs/demos/desktop#tauri)
- [`Chrome and Chromium Extensions`](https://docs.sheetjs.com/docs/demos/chromium)
- [`Google Sheets API`](https://docs.sheetjs.com/docs/demos/gsheet)
- [`ExtendScript for Adobe Apps`](https://docs.sheetjs.com/docs/demos/extendscript)
- [`NetSuite SuiteScript`](https://docs.sheetjs.com/docs/demos/netsuite)
- [`SalesForce Lightning Web Components`](https://docs.sheetjs.com/docs/demos/salesforce)
- [`Excel JavaScript API`](https://docs.sheetjs.com/docs/demos/excel)
- [`Headless Automation`](https://docs.sheetjs.com/docs/demos/headless)
- [`Other JavaScript Engines`](https://docs.sheetjs.com/docs/demos/engines)
- [`Azure Functions and Storage`](https://docs.sheetjs.com/docs/demos/azure)
- [`Amazon Web Services`](https://docs.sheetjs.com/docs/demos/aws)
- [`Databases and Structured Data Stores`](https://docs.sheetjs.com/docs/demos/database)
- [`NoSQL and Unstructured Data Stores`](https://docs.sheetjs.com/docs/demos/nosql)
- [`Legacy Internet Explorer`](https://docs.sheetjs.com/docs/demos/legacy#internet-explorer)
-
-**Bundlers and Tooling**
- [`browserify`](https://docs.sheetjs.com/docs/demos/bundler#browserify)
- [`bun`](https://docs.sheetjs.com/docs/demos/bundler#bun)
- [`esbuild`](https://docs.sheetjs.com/docs/demos/bundler#esbuild)
- [`parcel`](https://docs.sheetjs.com/docs/demos/bundler#parcel)
- [`requirejs`](https://docs.sheetjs.com/docs/demos/bundler#requirejs)
- [`rollup`](https://docs.sheetjs.com/docs/demos/bundler#rollup)
- [`snowpack`](https://docs.sheetjs.com/docs/demos/bundler#snowpack)
- [`swc`](https://docs.sheetjs.com/docs/demos/bundler#swc)
- [`systemjs`](https://docs.sheetjs.com/docs/demos/bundler#systemjs)
- [`vite`](https://docs.sheetjs.com/docs/demos/bundler#vite)
- [`webpack`](https://docs.sheetjs.com/docs/demos/bundler#webpack)
- [`wmr`](https://docs.sheetjs.com/docs/demos/bundler#wmr)
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/altjs/README.md
+++ b/demos/altjs/README.md
@ -1,7 +0,0 @@
-# Other JS Engines and Deployments
-
-[The new demo](https://docs.sheetjs.com/docs/demos/engines)
-includes more detailed instructions and more JS engines.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/angular/README.md
+++ b/demos/angular/README.md
@ -1,10 +0,0 @@
-# AngularJS
-
-The content has been reorganized;
-
- [The "Legacy Frameworks" section](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
-  covers the AngularJS basics.
- [The "Angular UI Grid" section](https://docs.sheetjs.com/docs/demos/legacy#angularjs)
-  covers the integration with Angular UI Grid.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/angular2/README.md
+++ b/demos/angular2/README.md
@ -1,11 +0,0 @@
-# Angular 2+
-
-[The new demo](https://docs.sheetjs.com/docs/demos/angular) has an updated
-exposition for legacy and modern deployments alike.
-
-The ecosystem demos were grouped by type in the new demo site:
-
- [NativeScript](https://docs.sheetjs.com/docs/demos/mobile#nativescript) is now part of "iOS and Android Apps"
- [Ionic](https://docs.sheetjs.com/docs/demos/mobile#ionic) is now part of "iOS and Android Apps"
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/array/README.md
+++ b/demos/array/README.md
@ -1,6 +0,0 @@
-# Typed Arrays and Math
-
-[The new demo](https://docs.sheetjs.com/docs/demos/ml) includes 
-interactive examples as well as strategies for CSV and JS Array interchange.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/browserify/README.md
+++ b/demos/browserify/README.md
@ -1,6 +0,0 @@
-# Browserify
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#browserify)
-includes a more concise example.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/chrome/README.md
+++ b/demos/chrome/README.md
@ -1,6 +0,0 @@
-# Chrome and Chromium
-
-[The new demo](https://docs.sheetjs.com/docs/demos/chromium)
-includes more up-to-date details.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/database/README.md
+++ b/demos/database/README.md
@ -1,11 +0,0 @@
-# Databases
-
-This demo has been split up for clarity:
-
- <https://docs.sheetjs.com/docs/demos/database> covers SQL and
-  structured data (including CRUD operations)
-
- https://docs.sheetjs.com/docs/demos/nosql covers unstructured
-  data including "NoSQL" data stores.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/datagrid/README.md
+++ b/demos/datagrid/README.md
@ -1,7 +0,0 @@
-# canvas-datagrid
-
-[The new demo](https://docs.sheetjs.com/docs/demos/grid#canvas-datagrid)
-includes a live example and improved explanations.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/deno/README.md
+++ b/demos/deno/README.md
@ -1,13 +0,0 @@
-# Deno
-
-Deno is a runtime capable of running JS code including this library.
-
-Demos have been integrated in the [documentation](https://docs.sheetjs.com) :
-
- <https://docs.sheetjs.com/docs/installation/deno> installation
- <https://docs.sheetjs.com/docs/example> writing JS data to a spreadsheet
- <https://docs.sheetjs.com/docs/solutions/input> input strategies
- <https://docs.sheetjs.com/docs/solutions/output> output strategies
- <https://docs.sheetjs.com/docs/demos/cli#deno> `deno compile`
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/electron/README.md
+++ b/demos/electron/README.md
@ -1,6 +0,0 @@
-# Electron
-
-[The new demo](https://docs.sheetjs.com/docs/demos/desktop#electron)
-includes an improved example and detailed explanations.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/extendscript/README.md
+++ b/demos/extendscript/README.md
@ -1,7 +0,0 @@
-# Adobe ExtendScript
-
-[The new demo](https://docs.sheetjs.com/docs/demos/extendscript)
-has a more focused Photoshop example as well as notes about other extensibility
-frameworks shipping with newer versions of Creative Cloud apps.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/function/README.md
+++ b/demos/function/README.md
@ -1,9 +0,0 @@
-# "Serverless" Functions
-
-Cloud services are covered in separate demos:
-
- [AWS](https://docs.sheetjs.com/docs/demos/aws)
- [Azure](https://docs.sheetjs.com/docs/demos/azure)
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
-
--- a/demos/google-sheet/README.md
+++ b/demos/google-sheet/README.md
@ -1,9 +0,0 @@
-# Google Sheets API
-
-The old demo used a deprecated version of the Google Sheets API to export data
-from Google Sheets Documents.
-
-[The new demo](https://docs.sheetjs.com/docs/demos/gsheet) uses
-the new Google Sheets API to read and write data.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/headless/README.md
+++ b/demos/headless/README.md
@ -1,8 +0,0 @@
-# Headless Browsers
-
-[The new demo](https://docs.sheetjs.com/docs/demos/headless)
-has a more focused table export example as well as a demo script for Chromium
-automation with Puppeteer and multi-browser automation with Playwright.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/knockout/README.md
+++ b/demos/knockout/README.md
@ -1,7 +0,0 @@
-# Knockout
-
-[The new demo](https://docs.sheetjs.com/docs/demos/legacy#knockoutjs)
-includes a live example and improved explanations.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/meteor/README.md
+++ b/demos/meteor/README.md
@ -1,8 +0,0 @@
-# Meteor
-
-This demo originally covered Meteor's package manager and other nuances.  At the
-time the demo was written, Meteor had its own ecosystem that clashed with the
-burgeoning NodeJS package ecosystem.  Eventually, Meteor added proper support
-for NodeJS modules.  New projects should follow the instructions for packages.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/nwjs/README.md
+++ b/demos/nwjs/README.md
@ -1,6 +0,0 @@
-# NW.js
-
-[The new demo](https://docs.sheetjs.com/docs/demos/desktop#nwjs)
-includes an improved example and detailed explanations.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/oldie/README.md
+++ b/demos/oldie/README.md
@ -1,6 +0,0 @@
-# Internet Explorer
-
-[The new demo](https://docs.sheetjs.com/docs/demos/legacy#internet-explorer)
-includes a live example and easier integration bundle.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/parcel/README.md
+++ b/demos/parcel/README.md
@ -1,6 +0,0 @@
-# Parcel
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#parcel)
-includes a more concise example.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/react/README.md
+++ b/demos/react/README.md
@ -1,12 +0,0 @@
-# React
-
-[The new demo](https://docs.sheetjs.com/docs/demos/react) has an updated
-exposition for legacy and modern deployments alike.
-
-The ecosystem demos were grouped by type in the new demo site:
-
- [server-rendered React components with `next.js`](https://docs.sheetjs.com/docs/demos/content#nextjs) is now part of "Content and Site Generation"
- [`react-native` deployment for iOS and android](https://docs.sheetjs.com/docs/demos/mobile#react-native) is now part of "iOS and Android Apps"
- [`react-data-grid` reading, modifying, and writing files](https://docs.sheetjs.com/docs/demo/grid#react-data-grid) 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/demos/requirejs/README.md
+++ b/demos/requirejs/README.md
@ -1,7 +0,0 @@
-# RequireJS
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#requirejs)
-includes a live example and improved explanations.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/rollup/README.md
+++ b/demos/rollup/README.md
@ -1,7 +0,0 @@
-# Rollup
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#rollup)
-includes a simple example and improved explanations.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/server/README.md
+++ b/demos/server/README.md
@ -1,11 +0,0 @@
-# NodeJS Server Deployments
-
-[The new demo](https://docs.sheetjs.com/docs/demos/server) has a more focused
-discussion with examples for popular JS server-side frameworks.
-
-Cloud services are covered in separate demos:
-
- [AWS](https://docs.sheetjs.com/docs/demos/aws)
- [Azure](https://docs.sheetjs.com/docs/demos/azure)
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/systemjs/README.md
+++ b/demos/systemjs/README.md
@ -1,6 +0,0 @@
-# SystemJS Demos
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#systemjs)
-includes a live example and improved explanations.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/typescript/README.md
+++ b/demos/typescript/README.md
@ -1,9 +0,0 @@
-# TypeScript
-
-This demo originally covered direct use of the `tsc` TypeScript compiler.  At
-the time when the demo was first written, TypeScript 2.2 had a module system
-that was incompatible with the pure JS ecosystem.  Since then, various
-language improvements and compiler changes have obviated this demo.  Uses of
-TypeScript are scattered throughout other demos.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/vue/README.md
+++ b/demos/vue/README.md
@ -1,12 +0,0 @@
-# VueJS
-
-[The new demo](https://docs.sheetjs.com/docs/demos/vue) has an updated
-exposition for legacy and modern deployments alike.
-
-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/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/demos/webpack/README.md
+++ b/demos/webpack/README.md
@ -1,6 +0,0 @@
-# Webpack
-
-[The new demo](https://docs.sheetjs.com/docs/demos/bundler#webpack)
-reflects the new default behavior to use the ESM build.
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/xhr/README.md
+++ b/demos/xhr/README.md
@ -1,7 +0,0 @@
-# XMLHttpRequest and fetch
-
-[The new demo](https://docs.sheetjs.com/docs/demos/network)
-includes interactive demos and improved explanations.
-
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/xspreadsheet/README.md
+++ b/demos/xspreadsheet/README.md
@ -1,18 +0,0 @@
-# x-spreadsheet
-
-The `sheet_to_json` utility function generates output arrays suitable for use
-with other JS libraries such as data grids for previewing data.  With a familiar
-UI, [`x-spreadsheet`](https://myliang.github.io/x-spreadsheet/) is an excellent
-choice for developers looking for a modern editor.
-
-[The new docs](https://docs.sheetjs.com/docs/demos/grid/#x-spreadsheet)
-include more detail and examples.
-
-The original demo is available at <https://docs.sheetjs.com/xspreadsheet/>
-
-A hosted version of the `xlsxspread.js` script is available on the SheetJS CDN:
-
- <https://cdn.sheetjs.com/xspreadsheet/xlsxspread.js> original script
- <https://cdn.sheetjs.com/xspreadsheet/xlsxspread.min.js> minified
-
-[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
--- a/demos/xspreadsheet/xlsxspread.js
+++ b/demos/xspreadsheet/xlsxspread.js
@ -1,133 +0,0 @@
-/*! xlsxspread.js (C) SheetJS LLC -- https://sheetjs.com/ */
-/* eslint-env browser */
-/*global XLSX */
-/*exported stox, xtos */
-console.log("The latest version of the xlsxspread.js script is at https://cdn.sheetjs.com/xspreadsheet/xlsxspread.js !")
-
-/**
- * Converts data from SheetJS to x-spreadsheet
- *
- * @param  {Object} wb SheetJS workbook object
- *
- * @returns {Object[]} An x-spreadsheet data
- */
-function stox(wb) {
-  var out = [];
-  wb.SheetNames.forEach(function (name) {
-    var o = { name: name, rows: {} };
-    var ws = wb.Sheets[name];
-    if(!ws || !ws["!ref"]) return;
-    var range = XLSX.utils.decode_range(ws['!ref']);
-    // sheet_to_json will lost empty row and col at begin as default
-    range.s = { r: 0, c: 0 };
-    var aoa = XLSX.utils.sheet_to_json(ws, {
-      raw: false,
-      header: 1,
-      range: range
-    });
-
-    aoa.forEach(function (r, i) {
-      var cells = {};
-      r.forEach(function (c, j) {
-        cells[j] = { text: c };
-
-        var cellRef = XLSX.utils.encode_cell({ r: i, c: j });
-
-        if ( ws[cellRef] != null && ws[cellRef].f != null) {
-          cells[j].text = "=" + ws[cellRef].f;
-        }
-      });
-      o.rows[i] = { cells: cells };
-    });
-
-    o.merges = [];
-    (ws["!merges"]||[]).forEach(function (merge, i) {
-      //Needed to support merged cells with empty content
-      if (o.rows[merge.s.r] == null) {
-        o.rows[merge.s.r] = { cells: {} };
-      }
-      if (o.rows[merge.s.r].cells[merge.s.c] == null) {
-        o.rows[merge.s.r].cells[merge.s.c] = {};
-      }
-
-      o.rows[merge.s.r].cells[merge.s.c].merge = [
-        merge.e.r - merge.s.r,
-        merge.e.c - merge.s.c
-      ];
-
-      o.merges[i] = XLSX.utils.encode_range(merge);
-    });
-
-    out.push(o);
-  });
-
-  return out;
-}
-
-/**
- * Converts data from x-spreadsheet to SheetJS
- *
- * @param  {Object[]} sdata An x-spreadsheet data object
- *
- * @returns {Object} A SheetJS workbook object
- */
-function xtos(sdata) {
-  var out = XLSX.utils.book_new();
-  sdata.forEach(function (xws) {
-    var ws = {};
-    var rowobj = xws.rows;
-    var minCoord = { r: 0, c: 0 }, maxCoord = { r: 0, c: 0 };
-    for (var ri = 0; ri < rowobj.len; ++ri) {
-      var row = rowobj[ri];
-      if (!row) continue;
-
-      Object.keys(row.cells).forEach(function (k) {
-        var idx = +k;
-        if (isNaN(idx)) return;
-
-        var lastRef = XLSX.utils.encode_cell({ r: ri, c: idx });
-        if (ri > maxCoord.r) maxCoord.r = ri;
-        if (idx > maxCoord.c) maxCoord.c = idx;
-
-        var cellText = row.cells[k].text, type = "s";
-        if (!cellText) {
-          cellText = "";
-          type = "z";
-        } else if (!isNaN(Number(cellText))) {
-          cellText = Number(cellText);
-          type = "n";
-        } else if (cellText.toLowerCase() === "true" || cellText.toLowerCase() === "false") {
-          cellText = Boolean(cellText);
-          type = "b";
-        }
-
-        ws[lastRef] = { v: cellText, t: type };
-
-        if (type == "s" && cellText[0] == "=") {
-          ws[lastRef].f = cellText.slice(1);
-        }
-
-        if (row.cells[k].merge != null) {
-          if (ws["!merges"] == null) ws["!merges"] = [];
-
-          ws["!merges"].push({
-            s: { r: ri, c: idx },
-            e: {
-              r: ri + row.cells[k].merge[0],
-              c: idx + row.cells[k].merge[1]
-            }
-          });
-        }
-      });
-    }
-    ws["!ref"] = minCoord ? XLSX.utils.encode_range({
-      s: minCoord,
-      e: maxCoord
-    }) : "A1";
-
-    XLSX.utils.book_append_sheet(out, ws, xws.name);
-  });
-
-  return out;
-}
-
--- a/dist/cpexcel.d.ts
+++ b/dist/cpexcel.d.ts
@ -0,0 +1,39 @@
+/* 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
@ -0,0 +1,4 @@
+/* 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/legend.png
+++ b/legend.png
--- a/misc/import.js
+++ b/misc/import.js
@ -0,0 +1 @@
+export { version } from "../";
--- a/modules/.gitignore
+++ b/modules/.gitignore
@ -1,9 +1,3 @@
-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
@ -0,0 +1,61 @@
+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
@ -0,0 +1,73 @@
+/* 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
@ -13,14 +13,18 @@ function rtf_to_sheet(d, opts) {
 }
 function rtf_to_sheet_str(str, opts) {
  var o = opts || {};
-  var ws = o.dense ? [] : {};
+  var ws = {};
+  var dense = o.dense;
+  if (dense)
+    ws["!data"] = [];
  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 (Array.isArray(ws))
-      ws[R] = [];
+    if (dense)
+      row = ws["!data"][R] = [];
    var rtfre = /\\[\w\-]+\b/g;
    var last_index = 0;
    var res;
@ -46,8 +50,8 @@ function rtf_to_sheet_str(str, opts) {
                cell.w = cell.v;
              cell.v = fuzzynum(cell.v);
            }
-            if (Array.isArray(ws))
-              ws[R][C] = cell;
+            if (dense)
+              row[C] = cell;
            else
              ws[encode_cell({ r: R, c: C })] = cell;
          }
@ -75,15 +79,17 @@ function sheet_to_rtf(ws, opts) {
  if (!ws["!ref"])
    return o[0] + "}";
  var r = safe_decode_range(ws["!ref"]), cell;
-  var dense = Array.isArray(ws);
+  var dense = ws["!data"] != null, row = [];
  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 ? (ws[R] || [])[C] : ws[coord];
+      cell = dense ? row[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
@ -1,5 +1,6 @@
-import { WorkBook, WorkSheet, Range, CellObject } from '../';
+import { WorkBook, WorkSheet, Range, CellObject, DenseSheet, SparseSheet, ParsingOptions, WritingOptions } from '../';
 import type { utils } from "../";
+type RawData = any;

 declare var encode_cell: typeof utils.encode_cell;
 declare var encode_range: typeof utils.encode_range;
@ -12,7 +13,7 @@ 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)/*:Worksheet*/ {
+function rtf_to_sheet(d: RawData, opts: ParsingOptions): WorkSheet {
 	switch(opts.type) {
 		case 'base64': return rtf_to_sheet_str(Base64_decode(d), opts);
 		case 'binary': return rtf_to_sheet_str(d, opts);
@ -23,16 +24,19 @@ function rtf_to_sheet(d/*:RawData*/, opts)/*:Worksheet*/ {
 }

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

 	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(Array.isArray(ws)) ws[R] = [];
+		if(dense) row = (ws as DenseSheet)["!data"][R] = [] as CellObject[];
 		var rtfre = /\\[\w\-]+\b/g;
 		var last_index = 0;
 		var res;
@ -51,8 +55,8 @@ function rtf_to_sheet_str(str: string, opts)/*: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(Array.isArray(ws)) ws[R][C] = cell;
-						else ws[encode_cell({r:R, c:C})] = cell;
+						if(dense) row[C] = cell;
+						else (ws as SparseSheet)[encode_cell({r:R, c:C})] = cell;
 					}
 					payload = [];
 					break;
@ -68,25 +72,26 @@ function rtf_to_sheet_str(str: string, opts)/*:Worksheet*/ {
 	return ws;
 }

-function rtf_to_workbook(d/*:RawData*/, opts): WorkBook {
+function rtf_to_workbook(d: RawData, opts: ParsingOptions): 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): string {
+function sheet_to_rtf(ws: WorkSheet, opts: WritingOptions): string {
 	var o: string[] = ["{\\rtf1\\ansi"];
 	if(!ws["!ref"]) return o[0] + "}";
 	var r = safe_decode_range(ws['!ref']), cell: CellObject;
-	var dense = Array.isArray(ws);
+	var dense = ws["!data"] != null, row: CellObject[] = [];
 	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 ? (ws[R]||[])[C]: ws[coord];
+			cell = dense ? row[C] : (ws as SparseSheet)[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");
@ -95,4 +100,3 @@ function sheet_to_rtf(ws: WorkSheet, opts): 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, name: string, _opts?: ParseXLMetaOptions): XLMeta {
+function parse_xlmeta_bin(data: RawData, 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.WTF)
+        if (!pass && (opts == null ? void 0 : 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
@ -2,24 +2,32 @@ 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 45_rtf.js 51_xlsxmeta.js 51_xlsbmeta.js 59_vba.js 64_ftab.js 83_numbers.js
+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

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

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

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

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

 src/numbers.ts: 83_numbers.ts
 	cat $< | sed 's/^\/\/<<//g' > $@
--- a/modules/reframe.node.ts
+++ b/modules/reframe.node.ts
@ -1,631 +0,0 @@
-/*! sheetjs (C) 2013-present SheetJS -- http://sheetjs.com */
-import { decompress_iwa_file, compress_iwa_file, u8concat, parse_iwa_file, write_iwa_file, varint_to_i32, parse_shallow, write_shallow, u8str, stru8, IWAArchiveInfo, parse_TSP_Reference, write_varint49, u8contains, u8_to_dataview, write_new_storage } from "./src/numbers";
-import { read, writeFile, utils, find, CFB$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 "$OUTF"
+if [ -e "$OUTF" ]; then chmod a+w "$OUTF"; fi
+cp "$INF" "$OUTF"
+chmod a-w "$OUTF"
 sleep 0.1
 # open "$OUTF"
 unzip -l "$OUTF"
-base64 "$OUTF" | tr -d '\n' > xlsx.zahl.js
+(base64 "$OUTF" || base64 -i "$OUTF") | tr -d '\n' > xlsx.zahl.js
 sed -i.bak 's/^/var XLSX_ZAHL_PAYLOAD = "/g;s/$/";\n/g' xlsx.zahl.js
 cp xlsx.zahl.js xlsx.zahl.mjs
 cat >> xlsx.zahl.js <<EOF
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
SheetJS	5b33acfaf4	parse self-closing text:p uof:文本串 (fixes #2927 )	2023-04-30 03:57:30 -04:00
SheetJS	b68eaed726	Export NaN/Infinity to error cells (fixes #2897 )	2023-04-23 03:58:36 -04:00
SheetJS	333e4e40f9	version bump 0.19.3	2023-04-17 23:39:28 -04:00
SheetJS	af8e3d9171	build fixes for macOS Ventura	2023-04-14 03:51:02 -04:00
Vsevolod Kokorin	dca90c8024	XLSX Ensure comment address is valid	2023-04-12 03:48:54 -04:00
SheetJS	c06a32043f	Add ESM helper methods to CJS build (fixes #2909 )	2023-04-10 01:15:44 -04:00
SheetJS	ffbea71bc2	XLS ExternSheet record (fixes #2907 )	2023-04-05 15:34:55 -04:00
SheetJS	16dd8a6eae	UTF16LE sans codepage (fixes #2898 h/t @brismuth )	2023-03-15 04:17:09 -04:00
SheetJS	0577bb7a45	version bump 0.19.2	2023-01-25 16:17:34 -05:00
SheetJS	b150dea21d	denoized otorp [ci skip]	2023-01-06 02:37:53 -05:00
SheetJS	e9cf1ad0fb	ignore unexpected attributes in rich text part Co-authored-by: colin4 <colin4@noreply.sheetjs.com>	2023-01-04 12:35:13 -05:00
SheetJS	5141222c24	`sheet_to_json` type include `origin` option Co-authored-by: Hulusi <chsdwn@noreply.sheetjs.com>	2023-01-01 16:53:44 -05:00
SheetJS	51a8619000	version bump 0.19.1	2022-11-17 04:35:34 -05:00
SheetJS	e7e129e417	type fix (fixes #2828 h/t @younes-io )	2022-11-16 14:03:42 -05:00
SheetJS	df48489211	Numbers 12.2 skip ActivityStream.iwa	2022-11-06 21:58:41 -05:00
SheetJS	050f66ce1b	version bump 0.19.0	2022-10-23 21:05:59 -04:00
SheetJS	2f329b64e2	DBF truncate numeric fields	2022-10-04 20:09:43 -04:00
SheetJS	515d1c6f2e	mini refresh [ci skip]	2022-10-04 16:50:55 -04:00
SheetJS	654d6f98c3	stringify all 's' cell values (fixes #2795 )	2022-09-28 23:08:10 -04:00
SheetJS	4ae4f0fad9	NUMBERS write multiple worksheets [ci skip]	2022-09-26 13:52:50 -04:00
Evan Bovie	1ca49a50bd	add display property to XLSX hyperlinks (#2791 ) Resolves import bug in Google Sheets	2022-09-23 13:36:38 -04:00
SheetJS	81b231d866	version bump 0.18.12	2022-09-22 05:06:45 -04:00
SheetJS	1491302aa4	package.json exports types	2022-09-21 18:17:14 -04:00
SheetJS	bd5878e7c7	NUMBERS write up to ALL1000000 (h/t @masaccio)	2022-09-20 01:35:34 -04:00
Evan Bovie	4dd092a076	Add `types` to subpath exports in `package.json`	2022-09-18 23:26:24 -04:00
390910131	04dc18e742	fix vue3-table-lite demo url typo	2022-09-13 13:58:09 +08:00
SheetJS	6a5be04e3d	Ś╫êëτ⌡ś and Š╫ěéτ⌡š	2022-09-09 16:59:22 -04:00
SheetJS	e90a61bf09	version bump 0.18.11	2022-09-06 02:18:12 -04:00
SheetJS	26cbfe37be	DBF write encoding (fixes #2781 h/t @ZJS248)	2022-09-06 00:02:39 -04:00
SheetJS	df0e7b5f25	NUMBERS duration cell number format	2022-09-04 17:51:49 -04:00
SheetJS	6c9010f9d1	comment fallback (fixes #2779 h/t @AbhinanduReddy)	2022-09-02 03:30:10 -04:00
SheetJS	0a6ddcaf44	removed sheet_to_dif IIFE	2022-08-30 03:00:32 -04:00