diff --git a/README.md b/README.md
index bea66ce..e886bf9 100644
--- a/README.md
+++ b/README.md
@@ -224,6 +224,14 @@ version and will refresh on each release.
 Each individual version can be referenced using a similar URL pattern.
 <https://cdn.sheetjs.com/xlsx-0.18.6/xlsx-0.18.6.tgz> is the URL for `0.18.6`
 
+Tarballs can be directly installed using a package manager:
+
+```bash
+$ npm  install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # npm
+$ pnpm install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # pnpm
+$ yarn add     https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # yarn
+```
+
 For general stability, "vendoring" modules is the recommended approach:
 
 1) Download the tarball (`xlsx-<version>.tgz`) for the desired version.
diff --git a/demos/xspreadsheet/index.html b/demos/xspreadsheet/index.html
index 633a0ab..dd80a43 100644
--- a/demos/xspreadsheet/index.html
+++ b/demos/xspreadsheet/index.html
@@ -36,7 +36,7 @@ a { text-decoration: none }
 <input type="file" name="xlfile" id="xlf" /> ... or click here to select a file
 <textarea id="b64data">... or paste a base64-encoding here</textarea>
 </pre>
-<p><input type="submit" value="Export to XLSX!" id="xport" onclick="export_xlsx();" disabled="true"></p>
+<p><input type="submit" value="Export to XLSX!" id="xport" onclick="export_xlsx();"></p>
 <div id="htmlout"></div>
 <br />
 <script src="https://unpkg.com/x-data-spreadsheet/dist/xspreadsheet.js"></script>
diff --git a/demos/xspreadsheet/xlsxspread.js b/demos/xspreadsheet/xlsxspread.js
index 2aec5b6..ac6e910 100644
--- a/demos/xspreadsheet/xlsxspread.js
+++ b/demos/xspreadsheet/xlsxspread.js
@@ -74,28 +74,18 @@ function xtos(sdata) {
   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;
 
-      var minCoord, maxCoord;
       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 (minCoord == null) {
-          minCoord = { r: ri, c: idx };
-        } else {
-          if (ri < minCoord.r) minCoord.r = ri;
-          if (idx < minCoord.c) minCoord.c = idx;
-        }
-        if (maxCoord == undefined) {
-          maxCoord = { r: ri, c: idx };
-        } else {
-          if (ri > maxCoord.r) maxCoord.r = ri;
-          if (idx > maxCoord.c) maxCoord.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) {
@@ -127,12 +117,11 @@ function xtos(sdata) {
           });
         }
       });
-
-      ws["!ref"] = XLSX.utils.encode_range({
-        s: { r: minCoord.r, c: minCoord.c },
-        e: { r: maxCoord.r, c: maxCoord.c }
-      });
     }
+    ws["!ref"] = minCoord ? XLSX.utils.encode_range({
+      s: minCoord,
+      e: maxCoord
+    }) : "A1";
 
     XLSX.utils.book_append_sheet(out, ws, xws.name);
   });
diff --git a/docbits/10_install.md b/docbits/10_install.md
index 3978cb6..2ab2174 100644
--- a/docbits/10_install.md
+++ b/docbits/10_install.md
@@ -110,6 +110,14 @@ version and will refresh on each release.
 Each individual version can be referenced using a similar URL pattern.
 <https://cdn.sheetjs.com/xlsx-0.18.6/xlsx-0.18.6.tgz> is the URL for `0.18.6`
 
+Tarballs can be directly installed using a package manager:
+
+```bash
+$ npm  install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # npm
+$ pnpm install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # pnpm
+$ yarn add     https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # yarn
+```
+
 For general stability, "vendoring" modules is the recommended approach:
 
 1) Download the tarball (`xlsx-<version>.tgz`) for the desired version.
diff --git a/misc/docs/README.md b/misc/docs/README.md
index ff5a1bc..eb0ed39 100644
--- a/misc/docs/README.md
+++ b/misc/docs/README.md
@@ -217,6 +217,14 @@ version and will refresh on each release.
 Each individual version can be referenced using a similar URL pattern.
 <https://cdn.sheetjs.com/xlsx-0.18.6/xlsx-0.18.6.tgz> is the URL for `0.18.6`
 
+Tarballs can be directly installed using a package manager:
+
+```bash
+$ npm  install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # npm
+$ pnpm install https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # pnpm
+$ yarn add     https://cdn.sheetjs.com/xlsx-latest/xlsx-latest.tgz # yarn
+```
+
 For general stability, "vendoring" modules is the recommended approach:
 
 1) Download the tarball (`xlsx-<version>.tgz`) for the desired version.