diff --git a/.spelling b/.spelling
index 300f8b1..99aa170 100644
--- a/.spelling
+++ b/.spelling
@@ -49,6 +49,7 @@ SessionStorage
 SQLite
 SystemJS
 VueJS
+WebKit
 WebSQL
 WK_
 iOS
diff --git a/README.md b/README.md
index 80226dd..8ffa936 100644
--- a/README.md
+++ b/README.md
@@ -44,19 +44,16 @@ port calculations to web apps; automate common spreadsheet tasks, and much more!
   * [JS Ecosystem Demos](#js-ecosystem-demos)
 - [Acquiring and Extracting Data](#acquiring-and-extracting-data)
   * [Parsing Workbooks](#parsing-workbooks)
-    + [API](#api)
-    + [Examples](#examples)
   * [Processing JSON and JS Data](#processing-json-and-js-data)
-    + [API](#api-1)
-    + [Examples](#examples-1)
   * [Processing HTML Tables](#processing-html-tables)
-    + [API](#api-2)
-    + [Examples](#examples-2)
 - [Working with the Workbook](#working-with-the-workbook)
   * [Parsing and Writing Examples](#parsing-and-writing-examples)
-- [Writing Workbooks](#writing-workbooks)
+- [Packaging and Releasing Data](#packaging-and-releasing-data)
+  * [Writing Workbooks](#writing-workbooks)
   * [Writing Examples](#writing-examples)
   * [Streaming Write](#streaming-write)
+  * [Generating JSON and JS Data](#generating-json-and-js-data)
+  * [Generating HTML Tables](#generating-html-tables)
 - [Interface](#interface)
   * [Parsing functions](#parsing-functions)
   * [Writing functions](#writing-functions)
@@ -263,7 +260,6 @@ and approaches for steps 1 and 5.
 
 Utility functions help with step 3.
 
-
 ### The Zen of SheetJS
 
 _Data processing should fit in any workflow_
@@ -525,7 +521,7 @@ Other examples are included in the [showcase](demos/showcase/).
 
 ### Parsing Workbooks
 
-#### API
+**API**
 
 _Extract data from spreadsheet bytes_
 
@@ -550,7 +546,7 @@ security risk), and attempts to read files in this way will throw an error.
 The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
 covers the supported properties and behaviors.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -565,7 +561,7 @@ var XLSX = require("xlsx");
 var workbook = XLSX.readFile("test.xlsx");
 ```
 
-For Node ESM, the `readFile` helper is not enabled.  Instead, `fs.readFileSync`
+For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
 should be used to read the file data as a `Buffer` for use with `XLSX.read`:
 
 ```js
@@ -946,8 +942,6 @@ const workbook = XLSX.read(data);
 </details>
 
 More detailed examples are covered in the [included demos](demos/)
-
-
 ### Processing JSON and JS Data
 
 JSON and JS data tend to represent single worksheets.  This section will use a
@@ -973,7 +967,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
 be added to a workbook by calling the function multiple times.
 
 
-#### API
+**API**
 
 _Create a worksheet from an array of arrays of JS values_
 
@@ -1011,17 +1005,68 @@ control the column order and header output.
 ["Array of Objects Input"](#array-of-arrays-input) describes the function and
 the optional `opts` argument in more detail.
 
-#### Examples
+**Examples**
 
 ["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
 from a JSON Endpoint and Generate a Workbook"
 
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`xtos` function for converting from x-spreadsheet data object to a workbook.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+<details>
+  <summary><b>Records from a database query (SQL or no-SQL)</b> (click to show)</summary>
+
 The [`database` demo](/demos/database/) includes examples of working with
 databases and query results.
 
+</details>
+
+
+<details>
+  <summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+When recovering data from `tfjs`, the returned data points are stored in a typed
+array.  An array of arrays can be constructed with loops. `Array#unshift` can
+prepend a title row before the conversion:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
+const tfdata = tf.stack([xs, ys]).transpose();
+const shape = tfdata.shape;
+const tfarr = tfdata.dataSync();
+
+/* construct the array of arrays */
+const aoa = [];
+for(let j = 0; j < shape[0]; ++j) {
+  aoa[j] = [];
+  for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
+}
+/* add headers to the top */
+aoa.unshift(["x", "y"]);
+
+/* generate worksheet */
+const worksheet = XLSX.utils.aoa_to_sheet(aoa);
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+</details>
+
+
 ### Processing HTML Tables
 
-#### API
+**API**
 
 _Create a worksheet by scraping an HTML TABLE in the page_
 
@@ -1049,7 +1094,7 @@ The options argument supports the same options as `table_to_sheet`, with the
 addition of a `sheet` property to control the worksheet name.  If the property
 is missing or no options are specified, the default name `Sheet1` is used.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -1130,6 +1175,116 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
 
 </details>
 
+<details>
+  <summary><b>Server-Side HTML Tables with Headless Chrome</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks.  The core idea is to add the script to the page, parse
+the table in the page context, generate a `base64` workbook and send it back
+for further processing:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
+
+const url = `https://sheetjs.com/demos/table`;
+
+/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
+const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
+
+(async() => {
+  /* start browser and go to web page */
+  const browser = await puppeteer.launch();
+  const page = await browser.newPage();
+  await page.goto(url, {waitUntil: "networkidle2"});
+
+  /* inject library */
+  await page.addScriptTag({content: lib});
+
+  /* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
+  await page.exposeFunction("s5s", async(b64) => {
+    const workbook = XLSX.read(b64, {type: "base64" });
+
+    /* DO SOMETHING WITH workbook HERE */
+  });
+
+  /* generate XLSB file in webpage context and send back result */
+  await page.addScriptTag({content: `
+    /* call table_to_book on first table */
+    var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
+
+    /* generate XLSX file */
+    var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
+
+    /* call "s5s" hook exposed from the node process */
+    window.s5s(b64);
+  `});
+
+  /* cleanup */
+  await browser.close();
+})();
+```
+
+</details>
+
+<details>
+  <summary><b>Server-Side HTML Tables with Headless WebKit</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
+is to add the script to the page, parse the table in the page context, generate
+a `binary` workbook and send it back for further processing:
+
+```js
+var XLSX = require('xlsx');
+var page = require('webpage').create();
+
+/* this code will be run in the page */
+var code = [ "function(){",
+  /* call table_to_book on first table */
+  "var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
+
+  /* generate XLSB file and return binary string */
+  "return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
+"}" ].join("");
+
+page.open('https://sheetjs.com/demos/table', function() {
+  /* Load the browser script from the UNPKG CDN */
+  page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
+    /* The code will return an XLSB file encoded as binary string */
+    var bin = page.evaluateJavaScript(code);
+
+    var workbook = XLSX.read(bin, {type: "binary"});
+    /* DO SOMETHING WITH workbook HERE */
+
+    phantom.exit();
+  });
+});
+```
+
+</details>
+
+<details>
+  <summary><b>NodeJS HTML Tables without a browser</b> (click to show)</summary>
+
+NodeJS does not include a DOM implementation and Puppeteer requires a hefty
+Chromium build.  [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs");
+const { JSDOM } = require("jsdom");
+
+/* obtain HTML string.  This example reads from test.html */
+const html_str = fs.readFileSync("test.html", "utf8");
+/* get first TABLE element */
+const doc = new JSDOM(html_str).window.document.querySelector("table");
+/* generate workbook */
+const workbook = XLSX.utils.table_to_book(doc);
+```
+
+</details>
+
 ## Working with the Workbook
 
 The full object format is described later in this README.
@@ -1213,37 +1368,82 @@ Some helper functions in `XLSX.utils` generate different views of the sheets:
 - `XLSX.utils.sheet_to_json` generates an array of objects
 - `XLSX.utils.sheet_to_formulae` generates a list of formulae
 
-## Writing Workbooks
+## Packaging and Releasing Data
 
-For writing, the first step is to generate output data.  The helper functions
-`write` and `writeFile` will produce the data in various formats suitable for
-dissemination.  The second step is to actual share the data with the end point.
-Assuming `workbook` is a workbook object:
+### Writing Workbooks
 
-<details>
-  <summary><b>nodejs write a file</b> (click to show)</summary>
+**API**
 
-`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
+_Generate spreadsheet bytes (file) from data_
 
 ```js
-if(typeof require !== 'undefined') XLSX = require('xlsx');
+var data = XLSX.write(workbook, opts);
+```
+
+The `write` method attempts to package data from the workbook into a file in
+memory.  By default, XLSX files are generated, but that can be controlled with
+the `bookType` property of the `opts` argument.  Based on the `type` option,
+the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
+
+The second `opts` argument is required.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+_Generate and attempt to save file_
+
+```js
+XLSX.writeFile(workbook, filename, opts);
+```
+
+The `writeFile` method packages the data and attempts to save the new file.  The
+export file format is determined by the extension of `filename` (`SheetJS.xlsx`
+signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
+
+The `writeFile` method uses platform-specific APIs to initiate the file save. In
+NodeJS, `fs.readFileSync` can create a file.  In the web browser, a download is
+attempted using the HTML5 `download` attribute, with fallbacks for IE.
+
+The second `opts` argument is optional.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+**Examples**
+
+<details>
+  <summary><b>Local file in a NodeJS server</b> (click to show)</summary>
+
+`writeFile` uses `fs.writeFileSync` in server environments:
+
+```js
+var XLSX = require("xlsx");
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
-/* at this point, out.xlsb is a file that you can distribute */
+XLSX.writeFile(workbook, "out.xlsb");
+```
+
+For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
+should be used to write the file data to a `Buffer` for use with `XLSX.write`:
+
+```js
+import { writeFileSync } from "fs";
+import { write } from "xlsx/xlsx.mjs";
+
+const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
+/* buf is a Buffer */
+const workbook = writeFileSync("out.xlsb", buf);
 ```
 
 </details>
 
 <details>
-  <summary><b>Photoshop ExtendScript write a file</b> (click to show)</summary>
+  <summary><b>Local file in a PhotoShop or InDesign plugin</b> (click to show)</summary>
 
 `writeFile` wraps the `File` logic in Photoshop and other ExtendScript targets.
 The specified path should be an absolute path:
 
 ```js
 #include "xlsx.extendscript.js"
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsx');
+XLSX.writeFile(workbook, "out.xlsx");
 /* at this point, out.xlsx is a file that you can distribute */
 ```
 
@@ -1252,44 +1452,7 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
 </details>
 
 <details>
-  <summary><b>Browser add TABLE element to page</b> (click to show)</summary>
-
-The `sheet_to_html` utility function generates HTML code that can be added to
-any DOM element.
-
-```js
-var worksheet = workbook.Sheets[workbook.SheetNames[0]];
-var container = document.getElementById('tableau');
-container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
-```
-
-</details>
-
-<details>
-  <summary><b>Browser upload file (ajax)</b> (click to show)</summary>
-
-A complete example using XHR is [included in the XHR demo](demos/xhr/), along
-with examples for fetch and wrapper libraries.  This example assumes the server
-can handle Base64-encoded files (see the demo for a basic nodejs server):
-
-```js
-/* in this example, send a base64 string to the server */
-var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
-
-var wbout = XLSX.write(workbook,wopts);
-
-var req = new XMLHttpRequest();
-req.open("POST", "/upload", true);
-var formdata = new FormData();
-formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
-formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
-req.send(formdata);
-```
-
-</details>
-
-<details>
-  <summary><b>Browser save file</b> (click to show)</summary>
+  <summary><b>Download a file in the browser to the user machine</b> (click to show)</summary>
 
 `XLSX.writeFile` wraps a few techniques for triggering a file save:
 
@@ -1303,14 +1466,14 @@ There is no standard way to determine if the actual file has been downloaded.
 
 ```js
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
+XLSX.writeFile(workbook, "out.xlsb");
 /* at this point, out.xlsb will have been downloaded */
 ```
 
 </details>
 
 <details>
-  <summary><b>Browser save file (compatibility)</b> (click to show)</summary>
+  <summary><b>Download a file in legacy browsers</b> (click to show)</summary>
 
 `XLSX.writeFile` techniques work for most modern browsers as well as older IE.
 For much older browsers, there are workarounds implemented by wrapper libraries.
@@ -1320,7 +1483,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
 
 ```js
 /* bookType can be any supported output type */
-var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
+var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
 
 var wbout = XLSX.write(workbook,wopts);
 
@@ -1333,11 +1496,11 @@ to generate local files, suitable for environments where ActiveX is unavailable:
 
 ```js
 Downloadify.create(id,{
-	/* other options are required! read the downloadify docs for more info */
-	filename: "test.xlsx",
-	data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
-	append: false,
-	dataType: 'base64'
+  /* other options are required! read the downloadify docs for more info */
+  filename: "test.xlsx",
+  data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
+  append: false,
+  dataType: "base64"
 });
 ```
 
@@ -1345,6 +1508,54 @@ The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
 
 </details>
 
+<details>
+  <summary><b>Browser upload file (ajax)</b> (click to show)</summary>
+
+A complete example using XHR is [included in the XHR demo](demos/xhr/), along
+with examples for fetch and wrapper libraries.  This example assumes the server
+can handle Base64-encoded files (see the demo for a basic nodejs server):
+
+```js
+/* in this example, send a base64 string to the server */
+var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
+
+var wbout = XLSX.write(workbook,wopts);
+
+var req = new XMLHttpRequest();
+req.open("POST", "/upload", true);
+var formdata = new FormData();
+formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
+formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
+req.send(formdata);
+```
+
+</details>
+
+<details>
+  <summary><b>PhantomJS (Headless Webkit) File Generation</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
+`fs.write` supports writing files from the main process but has a different
+interface from the NodeJS `fs` module:
+
+```js
+var XLSX = require('xlsx');
+var fs = require('fs');
+
+/* generate a binary string */
+var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
+/* write to file */
+fs.write("test.xlsx", bin, "wb");
+```
+
+Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
+to generate a workbook from HTML tables in a page in "Headless WebKit".
+
+</details>
+
+
+
 The [included demos](demos/) cover mobile apps and other special deployments.
 
 ### Writing Examples
@@ -1391,6 +1602,223 @@ stream.pipe(conv); conv.pipe(process.stdout);
 
 <https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
 
+### Generating JSON and JS Data
+
+JSON and JS data tend to represent single worksheets. The utility functions in
+this section work with single worksheets.
+
+The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
+the object structure in more detail.  `workbook.SheetNames` is an ordered list
+of the worksheet names.  `workbook.Sheets` is an object whose keys are sheet
+names and whose values are worksheet objects.
+
+The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
+
+**API**
+
+_Create an array of JS objects from a worksheet_
+
+```js
+var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
+```
+
+_Create an array of arrays of JS values from a worksheet_
+
+```js
+var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
+```
+
+The `sheet_to_json` utility function walks a workbook in row-major order,
+generating an array of objects.  The second `opts` argument controls a number of
+export decisions including the type of values (JS values or formatted text). The
+["JSON"](#json) section describes the argument in more detail.
+
+By default, `sheet_to_json` scans the first row and uses the values as headers.
+With the `header: 1` option, the function exports an array of arrays of values.
+
+**Examples**
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`stox` function for converting from a workbook to x-spreadsheet data object.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+<details>
+  <summary><b>Populating a database (SQL or no-SQL)</b> (click to show)</summary>
+
+The [`database` demo](/demos/database/) includes examples of working with
+databases and query results.
+
+</details>
+
+<details>
+  <summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+A single `Array#map` can pull individual named rows from `sheet_to_json` export:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+const key = "age"; // this is the field we want to pull
+const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
+const tf_data = tf.tensor1d(ages);
+```
+
+All fields can be processed at once using a transpose of the 2D tensor generated
+with the `sheet_to_json` export with `header: 1`. The first row, if it contains
+header labels, should be removed with a slice:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* array of arrays of the data starting on the second row */
+const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
+/* dataset in the "correct orientation" */
+const tf_dataset = tf.tensor2d(aoa).transpose();
+/* pull out each dataset with a slice */
+const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
+const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+</details>
+
+
+### Generating HTML Tables
+
+**API**
+
+_Generate HTML Table from Worksheet_
+
+```js
+var html = XLSX.utils.sheet_to_html(worksheet);
+```
+
+The `sheet_to_html` utility function generates HTML code based on the worksheet
+data.  Each cell in the worksheet is mapped to a `<TD>` element.  Merged cells
+in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
+
+**Examples**
+
+The `sheet_to_html` utility function generates HTML code that can be added to
+any DOM element by setting the `innerHTML`:
+
+```js
+var container = document.getElementById("tavolo");
+container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
+```
+
+Combining with `fetch`, constructing a site from a workbook is straightforward:
+
+<details>
+  <summary><b>Vanilla JS + HTML fetch workbook and generate table previews</b> (click to show)</summary>
+
+```html
+<body>
+  <style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
+  <div id="tavolo"></div>
+  <script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
+  <script type="text/javascript">
+(async() => {
+  /* fetch and parse workbook -- see the fetch example for details */
+  const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+
+  let output = [];
+  /* loop through the worksheet names in order */
+  workbook.SheetNames.forEach(name => {
+
+    /* generate HTML from the corresponding worksheets */
+    const worksheet = workbook.Sheets[name];
+    const html = XLSX.utils.sheet_to_html(worksheet);
+
+    /* add a header with the title name followed by the table */
+    output.push(`<H3>${name}</H3>${html}`);
+  });
+  /* write to the DOM at the end */
+  tavolo.innerHTML = output.join("\n");
+})();
+  </script>
+</body>
+```
+
+</details>
+
+<details>
+  <summary><b>React fetch workbook and generate HTML table previews</b> (click to show)</summary>
+
+It is generally recommended to use a React-friendly workflow, but it is possible
+to generate HTML and use it in React with `dangerouslySetInnerHTML`:
+
+```jsx
+function Tabeller(props) {
+  /* the workbook object is the state */
+  const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
+
+  /* fetch and update the workbook with an effect */
+  React.useEffect(() => { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    setWorkbook(wb);
+  })(); });
+
+  return workbook.SheetNames.map(name => (<>
+    <h3>name</h3>
+    <div dangerouslySetInnerHTML={{
+      /* this __html mantra is needed to set the inner HTML */
+      __html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
+    }} />
+  </>));
+}
+```
+
+The [`react` demo](demos/react) includes more React examples.
+
+</details>
+
+<details>
+  <summary><b>VueJS fetch workbook and generate HTML table previews</b> (click to show)</summary>
+
+It is generally recommended to use a VueJS-friendly workflow, but it is possible
+to generate HTML and use it in VueJS with the `v-html` directive:
+
+```jsx
+import { read, utils } from 'xlsx';
+import { reactive } from 'vue';
+
+const S5SComponent = {
+  mounted() { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    /* loop through the worksheet names in order */
+    workbook.SheetNames.forEach(name => {
+      /* generate HTML from the corresponding worksheets */
+      const html = utils.sheet_to_html(workbook.Sheets[name]);
+      /* add to state */
+      this.wb.wb.push({ name, html });
+    });
+  })(); },
+  /* this state mantra is required for array updates to work */
+  setup() { return { wb: reactive({ wb: [] }) }; },
+  template: `
+  <div v-for="ws in wb.wb" :key="ws.name">
+    <h3>{{ ws.name }}</h3>
+    <div v-html="ws.html"></div>
+  </div>`
+};
+```
+
+The [`vuejs` demo](demos/vue) includes more React examples.
+
+</details>
+
 ## Interface
 
 `XLSX` is the exposed variable in the browser and the exported node variable
diff --git a/bits/28_binstructs.js b/bits/28_binstructs.js
index dbed6fb..beef60c 100644
--- a/bits/28_binstructs.js
+++ b/bits/28_binstructs.js
@@ -132,8 +132,7 @@ function parse_RkNumber(data)/*:number*/ {
 	var b = data.slice(data.l, data.l + 4);
 	var fX100 = (b[0] & 1), fInt = (b[0] & 2);
 	data.l += 4;
-	b[0] &= 0xFC; // b[0] &= ~3;
-	var RK = fInt === 0 ? __double([0, 0, 0, 0, b[0], b[1], b[2], b[3]], 0) : __readInt32LE(b, 0) >> 2;
+	var RK = fInt === 0 ? __double([0, 0, 0, 0, (b[0] & 0xFC), b[1], b[2], b[3]], 0) : __readInt32LE(b, 0) >> 2;
 	return fX100 ? (RK / 100) : RK;
 }
 function write_RkNumber(data/*:number*/, o) {
diff --git a/bits/30_ctype.js b/bits/30_ctype.js
index 93b0120..976c1eb 100644
--- a/bits/30_ctype.js
+++ b/bits/30_ctype.js
@@ -111,7 +111,7 @@ var ct2type/*{[string]:string}*/ = ({
 
 	/* VBA */
 	"application/vnd.ms-office.vbaProject": "vba",
-	"application/vnd.ms-office.vbaProjectSignature": "vba",
+	"application/vnd.ms-office.vbaProjectSignature": "TODO",
 
 	/* Volatile Dependencies */
 	"application/vnd.ms-office.volatileDependencies": "TODO",
diff --git a/bits/68_wsbin.js b/bits/68_wsbin.js
index 0adf921..901f7bf 100644
--- a/bits/68_wsbin.js
+++ b/bits/68_wsbin.js
@@ -244,6 +244,12 @@ function write_BrtShortRk(cell, ncell, o) {
 	return o;
 }
 
+/* [MS-XLSB] 2.4.323 BrtCellRString */
+function parse_BrtCellRString(data) {
+	var cell = parse_XLSBCell(data);
+	var value = parse_RichStr(data);
+	return [cell, value, 'is'];
+}
 
 /* [MS-XLSB] 2.4.317 BrtCellSt */
 function parse_BrtCellSt(data) {
@@ -564,6 +570,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 			case 0x0010: /* 'BrtShortReal' */
 			case 0x0011: /* 'BrtShortSt' */
 			case 0x0012: /* 'BrtShortIsst' */
+			case 0x003E: /* 'BrtCellRString' */
 				p = ({t:val[2]}/*:any*/);
 				switch(val[2]) {
 					case 'n': p.v = val[1]; break;
@@ -571,6 +578,7 @@ function parse_ws_bin(data, _opts, idx, rels, wb/*:WBWBProps*/, themes, styles)/
 					case 'b': p.v = val[1] ? true : false; break;
 					case 'e': p.v = val[1]; if(opts.cellText !== false) p.w = BErr[p.v]; break;
 					case 'str': p.t = 's'; p.v = val[1]; break;
+					case 'is': p.t = 's'; p.v = val[1].t; break;
 				}
 				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;
diff --git a/bits/77_parsetab.js b/bits/77_parsetab.js
index 24fd18c..0e9553d 100644
--- a/bits/77_parsetab.js
+++ b/bits/77_parsetab.js
@@ -60,7 +60,7 @@ var XLSBRecordEnum = {
 	/*::[*/0x003A/*::]*/: { n:"BrtMdxMbrIstr" },
 	/*::[*/0x003B/*::]*/: { n:"BrtStr" },
 	/*::[*/0x003C/*::]*/: { n:"BrtColInfo", f:parse_ColInfo },
-	/*::[*/0x003E/*::]*/: { n:"BrtCellRString" },
+	/*::[*/0x003E/*::]*/: { n:"BrtCellRString", f:parse_BrtCellRString },
 	/*::[*/0x003F/*::]*/: { n:"BrtCalcChainItem$", f:parse_BrtCalcChainItem$ },
 	/*::[*/0x0040/*::]*/: { n:"BrtDVal", f:parse_BrtDVal },
 	/*::[*/0x0041/*::]*/: { n:"BrtSxvcellNum" },
diff --git a/bits/79_html.js b/bits/79_html.js
index b8849cf..92b1884 100644
--- a/bits/79_html.js
+++ b/bits/79_html.js
@@ -139,6 +139,7 @@ function sheet_add_dom(ws/*:Worksheet*/, table/*:HTMLElement*/, _opts/*:?any*/)/
 			or_R = _origin.r; or_C = _origin.c;
 		}
 	}
+
 	var rows/*:HTMLCollection<HTMLTableRowElement>*/ = table.getElementsByTagName('tr');
 	var sheetRows = Math.min(opts.sheetRows||10000000, rows.length);
 	var range/*:Range*/ = {s:{r:0,c:0},e:{r:or_R,c:or_C}};
@@ -223,7 +224,7 @@ function is_dom_element_hidden(element/*:HTMLElement*/)/*:boolean*/ {
 	var display/*:string*/ = '';
 	var get_computed_style/*:?function*/ = get_get_computed_style_function(element);
 	if(get_computed_style) display = get_computed_style(element).getPropertyValue('display');
-	if(!display) display = element.style.display; // Fallback for cases when getComputedStyle is not available (e.g. an old browser or some Node.js environments) or doesn't work (e.g. if the element is not inserted to a document)
+	if(!display) display = element.style && element.style.display;
 	return display === 'none';
 }
 
diff --git a/demos/headless/.eslintrc b/demos/headless/.eslintrc
new file mode 100644
index 0000000..4d91234
--- /dev/null
+++ b/demos/headless/.eslintrc
@@ -0,0 +1,11 @@
+{
+
+	"env": { "node":true },
+	"parserOptions": {
+		"ecmaVersion": 8
+	},
+	"rules": {
+		"no-var": 0,
+		"semi": [ 2, "always" ]
+	}
+}
diff --git a/demos/headless/README.md b/demos/headless/README.md
index d26ef0f..9a5b3b6 100644
--- a/demos/headless/README.md
+++ b/demos/headless/README.md
@@ -3,30 +3,42 @@
 The library, eschewing unstable and nascent ECMAScript features, plays nicely
 with most headless browsers.  This demo shows a few common headless scenarios.
 
-## PhantomJS
+NodeJS does not ship with its own layout engine.  For advanced HTML exports, a
+headless browser is generally indistinguishable from a browser process.
 
-This was tested in PhantomJS 2.1.1, installed using the node module:
+## Chromium Automation with Puppeteer
+
+[Puppeteer](https://npm.im/puppeteer) enables headless Chromium automation.
+
+[`html.js`](./html.js) shows a dedicated script for converting an HTML file to
+XLSB using puppeteer.  The first argument is the path to the HTML file.  The
+script writes to `output.xlsb`:
+
+```bash
+# read from test.html and write to output.xlsb
+$ node html.js test.html
+```
+
+The script pulls up the webpage using headless Chromium and adds a script tag
+reference to the standalone browser build.  That will make the `XLSX` variable
+available to future scripts added in the page!  The browser context is not able
+to save the file using `writeFile`, so the demo generates the XLSB spreadsheet
+bytes with the `base64` type, sends the string back to the main process, and
+uses `fs.writeFileSync` to write the file.
+
+## WebKit Automation with PhantomJS
+
+This was tested using [PhantomJS 2.1.1](https://phantomjs.org/download.html)
 
 ```bash
-$ npm install -g phantomjs
 $ phantomjs phantomjs.js
 ```
 
-## Chrome Automation
-
-This was tested in puppeteer 0.9.0 (Chromium revision 494755) and `chromeless`:
-
-```bash
-$ npm install puppeteer
-$ node puppeteer.js
-
-$ npm install -g chromeless
-$ node chromeless.js
-```
-
-Since the main process is node, the read and write features should be placed in
-the webpage.  The `dist` versions are suitable for web pages.
+The flow is similar to the Puppeteer flow (scrape table and generate workbook in
+website context, copy string back, write string to file from main process).
 
+The `binary` type generates strings that can be written in PhantomJS using the
+`fs.write` method with mode `"wb"`.
 
 ## wkhtmltopdf
 
@@ -36,13 +48,5 @@ This was tested in wkhtmltopdf 0.12.4, installed using the official binaries:
 $ wkhtmltopdf --javascript-delay 20000 http://oss.sheetjs.com/sheetjs/tests/ test.pdf
 ```
 
-## SlimerJS
-
-This was tested in SlimerJS 0.10.3 and FF 52.0, installed using `brew` on OSX:
-
-```bash
-$ brew install slimerjs
-$ slimerjs slimerjs.js
-```
 
 [![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)
diff --git a/demos/headless/chromeless.js b/demos/headless/chromeless.js
deleted file mode 100644
index ed63b76..0000000
--- a/demos/headless/chromeless.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const { Chromeless } = require('chromeless');
-const TEST = 'http://localhost:8000', TIME = 30 * 1000;
-(async() => {
-  const browser = new Chromeless();
-  const pth = await browser.goto(TEST).wait(TIME).screenshot();
-  console.log(pth);
-  await browser.end();
-})().catch(e=>{ console.error(e); });
-
diff --git a/demos/headless/html.js b/demos/headless/html.js
new file mode 100755
index 0000000..4abec89
--- /dev/null
+++ b/demos/headless/html.js
@@ -0,0 +1,51 @@
+#!/usr/bin/env node
+/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
+const puppeteer = require("puppeteer");
+const path = require("path");
+const fs = require("fs");
+
+/* inf is the path to the html file -> url is a file URL */
+let inf = process.argv[2] || "test.html";
+let htmlpath = path.join(__dirname, inf);
+if(!fs.existsSync(htmlpath)) htmlpath =  path.join(process.cwd(), inf);
+if(!fs.existsSync(htmlpath)) htmlpath =  path.resolve(inf);
+if(!fs.existsSync(htmlpath)) { console.error(`Could not find a valid file for \`${inf}\``); process.exit(4); }
+console.error(`Reading from ${htmlpath}`);
+const url = `file://${htmlpath}`;
+
+/* get the standalone build source (e.g. node_modules/xlsx/dist/xlsx.full.min.js) */
+// const websrc = fs.readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
+const get_lib = (jspath) => fs.readFileSync(path.resolve(__dirname, jspath)).toString();
+const websrc = get_lib("xlsx.full.min.js");
+
+(async() => {
+  /* start browser and go to web page */
+  const browser = await puppeteer.launch();
+  const page = await browser.newPage();
+  page.on("console", msg => console.log("PAGE LOG:", msg.text()));
+  await page.setViewport({width: 1920, height: 1080});
+  await page.goto(url, {waitUntil: "networkidle2"});
+
+  /* inject library */
+  await page.addScriptTag({content: websrc});
+
+  /* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
+  await page.exposeFunction("s5s", async(b64) => {
+    fs.writeFileSync("output.xlsb", b64, {encoding: "base64"});
+  });
+
+  /* generate XLSB file in webpage context and send back a Base64-encoded string */
+  await page.addScriptTag({content: `
+    /* call table_to_book on first table */
+    var wb = XLSX.utils.table_to_book(document.getElementsByTagName("TABLE")[0]);
+
+    /* generate XLSB file */
+    var b64 = XLSX.write(wb, {type: "base64", bookType: "xlsb"});
+
+    /* call "s5s" hook exposed from the node process */
+    window.s5s(b64);
+  `});
+
+  /* cleanup */
+  await browser.close();
+})();
diff --git a/demos/headless/phantomjs.js b/demos/headless/phantomjs.js
index 0281d48..25bf7df 100644
--- a/demos/headless/phantomjs.js
+++ b/demos/headless/phantomjs.js
@@ -1,15 +1,35 @@
 /* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
-var fs = require('fs');
-var xlsx = require('../../xlsx');
+/* eslint-env phantomjs */
+var XLSX = require('xlsx');
+
 var page = require('webpage').create();
+page.onConsoleMessage = function(msg) { console.log(msg); };
 
-page.open('http://oss.sheetjs.com/sheetjs/tests/', function(status) {
+/* this code will be run in the page */
+var code = [ "function(){",
+  /* call table_to_book on first table */
+  "var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
 
-  var data = fs.read('sheetjs.xlsx', {mode: 'rb', charset: 'utf8'});
-  var workbook = xlsx.read(data, {type: 'binary'});
-  data = xlsx.utils.sheet_to_csv(workbook.Sheets['SheetJS']);
-  console.log("Data: " + data);
+  /* generate XLSB file and return binary string */
+  "return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
+"}" ].join("");
 
-  phantom.exit();
+page.open('https://sheetjs.com/demos/table', function() {
+  console.log("Page Loaded");
+  /* Load the browser script from the UNPKG CDN */
+  page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
+    /* Verify the page is loaded by logging the version number */
+    var version = "function(){ console.log('Library Version:' + window.XLSX.version); }";
+    page.evaluateJavaScript(version);
+
+    /* The code will return a binary string */
+    var bin = page.evaluateJavaScript(code);
+    var workbook = XLSX.read(bin, {type: "binary"});
+    console.log(XLSX.utils.sheet_to_csv(workbook.Sheets[workbook.SheetNames[0]]));
+
+    /* XLSX.writeFile will not work here -- have to write manually */
+    require("fs").write("phantomjs.xlsb", bin, "wb");
+    phantom.exit();
+  });
 });
 
diff --git a/demos/headless/puppeteer.js b/demos/headless/puppeteer.js
deleted file mode 100644
index 0958297..0000000
--- a/demos/headless/puppeteer.js
+++ /dev/null
@@ -1,14 +0,0 @@
-/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
-const puppeteer = require('puppeteer');
-
-(async () => {
-
-  const browser = await puppeteer.launch();
-  const page = await browser.newPage();
-  await page.goto('http://oss.sheetjs.com/sheetjs/tests/', {waitUntil: 'load'});
-	await page.waitFor(30*1000);
-  await page.pdf({path: 'test.pdf', format: 'A4'});
-
-  browser.close();
-})();
-
diff --git a/demos/headless/slimerjs.js b/demos/headless/slimerjs.js
deleted file mode 100644
index 1d1fe16..0000000
--- a/demos/headless/slimerjs.js
+++ /dev/null
@@ -1,15 +0,0 @@
-/* xlsx.js (C) 2013-present  SheetJS -- http://sheetjs.com */
-var fs = require('fs');
-var xlsx = require('../../dist/xlsx.full.min');
-var page = require('webpage').create();
-
-page.open('http://oss.sheetjs.com/sheetjs/tests/', function(status) {
-
-  var data = fs.read('sheetjs.xlsx', {mode: 'rb', charset: 'utf8'});
-  var workbook = xlsx.read(data, {type: 'binary'});
-  data = xlsx.utils.sheet_to_csv(workbook.Sheets['SheetJS']);
-  console.log("Data: " + data);
-
-  phantom.exit();
-});
-
diff --git a/demos/headless/test.html b/demos/headless/test.html
new file mode 100644
index 0000000..2a6f24c
--- /dev/null
+++ b/demos/headless/test.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>SheetJS Table Export</title>
+  </head>
+  <body>
+    <table id="data-table">
+      <tr>
+        <td id="data-table-A1"><span contenteditable="true">SheetJS</span></td>
+        <td id="data-table-B1"><span contenteditable="true">Table</span></td>
+        <td id="data-table-C1"><span contenteditable="true">Export</span></td>
+        <td id="data-table-D1"><span contenteditable="true">Test</span></td>
+      </tr>
+      <tr>
+        <td id="data-table-A2"><span contenteditable="true">&#xBB5;&#xBA3;&#xB95;&#xBCD;&#xB95;&#xBAE;&#xBCD;</span></td>
+        <td id="data-table-B2"><span contenteditable="true">&#xE2A;&#xE27;&#xE31;&#xE2A;&#xE14;&#xE35;</span></td>
+        <td id="data-table-C2"><span contenteditable="true">&#x4F60;&#x597D;</span></td>
+        <td id="data-table-D2"><span contenteditable="true">&#xAC00;&#xC9C0;&#xB9C8;</span></td>
+      </tr>
+      <tr>
+        <td id="data-table-A3"><span contenteditable="true">1</span></td>
+        <td id="data-table-B3"><span contenteditable="true">2</span></td>
+        <td id="data-table-C3"><span contenteditable="true">3</span></td>
+        <td id="data-table-D3"><span contenteditable="true">4</span></td>
+      </tr>
+      <tr>
+        <td id="data-table-A4"><span contenteditable="true">Click</span></td>
+        <td id="data-table-B4"><span contenteditable="true">to</span></td>
+        <td id="data-table-C4"><span contenteditable="true">edit</span></td>
+        <td id="data-table-D4"><span contenteditable="true">cells</span></td>
+      </tr>
+    </table>
+  </body>
+</html>
diff --git a/demos/headless/xlsx.full.min.js b/demos/headless/xlsx.full.min.js
new file mode 120000
index 0000000..dbca48d
--- /dev/null
+++ b/demos/headless/xlsx.full.min.js
@@ -0,0 +1 @@
+../../dist/xlsx.full.min.js
\ No newline at end of file
diff --git a/docbits/13_usage.md b/docbits/13_usage.md
index 979cdf4..5a621d1 100644
--- a/docbits/13_usage.md
+++ b/docbits/13_usage.md
@@ -48,7 +48,6 @@ and approaches for steps 1 and 5.
 
 Utility functions help with step 3.
 
-
 ### The Zen of SheetJS
 
 _Data processing should fit in any workflow_
diff --git a/docbits/20_import.md b/docbits/20_import.md
index 5c0bbac..33a879c 100644
--- a/docbits/20_import.md
+++ b/docbits/20_import.md
@@ -2,7 +2,7 @@
 
 ### Parsing Workbooks
 
-#### API
+**API**
 
 _Extract data from spreadsheet bytes_
 
@@ -27,7 +27,7 @@ security risk), and attempts to read files in this way will throw an error.
 The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
 covers the supported properties and behaviors.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -42,7 +42,7 @@ var XLSX = require("xlsx");
 var workbook = XLSX.readFile("test.xlsx");
 ```
 
-For Node ESM, the `readFile` helper is not enabled.  Instead, `fs.readFileSync`
+For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
 should be used to read the file data as a `Buffer` for use with `XLSX.read`:
 
 ```js
@@ -423,5 +423,3 @@ const workbook = XLSX.read(data);
 </details>
 
 More detailed examples are covered in the [included demos](demos/)
-
-
diff --git a/docbits/22_ingress.md b/docbits/22_ingress.md
index 14550ce..379b3ed 100644
--- a/docbits/22_ingress.md
+++ b/docbits/22_ingress.md
@@ -23,7 +23,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
 be added to a workbook by calling the function multiple times.
 
 
-#### API
+**API**
 
 _Create a worksheet from an array of arrays of JS values_
 
@@ -61,17 +61,68 @@ control the column order and header output.
 ["Array of Objects Input"](#array-of-arrays-input) describes the function and
 the optional `opts` argument in more detail.
 
-#### Examples
+**Examples**
 
 ["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
 from a JSON Endpoint and Generate a Workbook"
 
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`xtos` function for converting from x-spreadsheet data object to a workbook.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+<details>
+  <summary><b>Records from a database query (SQL or no-SQL)</b> (click to show)</summary>
+
 The [`database` demo](/demos/database/) includes examples of working with
 databases and query results.
 
+</details>
+
+
+<details>
+  <summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+When recovering data from `tfjs`, the returned data points are stored in a typed
+array.  An array of arrays can be constructed with loops. `Array#unshift` can
+prepend a title row before the conversion:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
+const tfdata = tf.stack([xs, ys]).transpose();
+const shape = tfdata.shape;
+const tfarr = tfdata.dataSync();
+
+/* construct the array of arrays */
+const aoa = [];
+for(let j = 0; j < shape[0]; ++j) {
+  aoa[j] = [];
+  for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
+}
+/* add headers to the top */
+aoa.unshift(["x", "y"]);
+
+/* generate worksheet */
+const worksheet = XLSX.utils.aoa_to_sheet(aoa);
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+</details>
+
+
 ### Processing HTML Tables
 
-#### API
+**API**
 
 _Create a worksheet by scraping an HTML TABLE in the page_
 
@@ -99,7 +150,7 @@ The options argument supports the same options as `table_to_sheet`, with the
 addition of a `sheet` property to control the worksheet name.  If the property
 is missing or no options are specified, the default name `Sheet1` is used.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -180,3 +231,113 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
 
 </details>
 
+<details>
+  <summary><b>Server-Side HTML Tables with Headless Chrome</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks.  The core idea is to add the script to the page, parse
+the table in the page context, generate a `base64` workbook and send it back
+for further processing:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
+
+const url = `https://sheetjs.com/demos/table`;
+
+/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
+const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
+
+(async() => {
+  /* start browser and go to web page */
+  const browser = await puppeteer.launch();
+  const page = await browser.newPage();
+  await page.goto(url, {waitUntil: "networkidle2"});
+
+  /* inject library */
+  await page.addScriptTag({content: lib});
+
+  /* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
+  await page.exposeFunction("s5s", async(b64) => {
+    const workbook = XLSX.read(b64, {type: "base64" });
+
+    /* DO SOMETHING WITH workbook HERE */
+  });
+
+  /* generate XLSB file in webpage context and send back result */
+  await page.addScriptTag({content: `
+    /* call table_to_book on first table */
+    var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
+
+    /* generate XLSX file */
+    var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
+
+    /* call "s5s" hook exposed from the node process */
+    window.s5s(b64);
+  `});
+
+  /* cleanup */
+  await browser.close();
+})();
+```
+
+</details>
+
+<details>
+  <summary><b>Server-Side HTML Tables with Headless WebKit</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
+is to add the script to the page, parse the table in the page context, generate
+a `binary` workbook and send it back for further processing:
+
+```js
+var XLSX = require('xlsx');
+var page = require('webpage').create();
+
+/* this code will be run in the page */
+var code = [ "function(){",
+  /* call table_to_book on first table */
+  "var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
+
+  /* generate XLSB file and return binary string */
+  "return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
+"}" ].join("");
+
+page.open('https://sheetjs.com/demos/table', function() {
+  /* Load the browser script from the UNPKG CDN */
+  page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
+    /* The code will return an XLSB file encoded as binary string */
+    var bin = page.evaluateJavaScript(code);
+
+    var workbook = XLSX.read(bin, {type: "binary"});
+    /* DO SOMETHING WITH workbook HERE */
+
+    phantom.exit();
+  });
+});
+```
+
+</details>
+
+<details>
+  <summary><b>NodeJS HTML Tables without a browser</b> (click to show)</summary>
+
+NodeJS does not include a DOM implementation and Puppeteer requires a hefty
+Chromium build.  [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs");
+const { JSDOM } = require("jsdom");
+
+/* obtain HTML string.  This example reads from test.html */
+const html_str = fs.readFileSync("test.html", "utf8");
+/* get first TABLE element */
+const doc = new JSDOM(html_str).window.document.querySelector("table");
+/* generate workbook */
+const workbook = XLSX.utils.table_to_book(doc);
+```
+
+</details>
+
diff --git a/docbits/30_export.md b/docbits/30_export.md
index a3d9cb8..d0ca55c 100644
--- a/docbits/30_export.md
+++ b/docbits/30_export.md
@@ -1,34 +1,79 @@
-## Writing Workbooks
+## Packaging and Releasing Data
 
-For writing, the first step is to generate output data.  The helper functions
-`write` and `writeFile` will produce the data in various formats suitable for
-dissemination.  The second step is to actual share the data with the end point.
-Assuming `workbook` is a workbook object:
+### Writing Workbooks
 
-<details>
-  <summary><b>nodejs write a file</b> (click to show)</summary>
+**API**
 
-`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
+_Generate spreadsheet bytes (file) from data_
 
 ```js
-if(typeof require !== 'undefined') XLSX = require('xlsx');
+var data = XLSX.write(workbook, opts);
+```
+
+The `write` method attempts to package data from the workbook into a file in
+memory.  By default, XLSX files are generated, but that can be controlled with
+the `bookType` property of the `opts` argument.  Based on the `type` option,
+the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
+
+The second `opts` argument is required.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+_Generate and attempt to save file_
+
+```js
+XLSX.writeFile(workbook, filename, opts);
+```
+
+The `writeFile` method packages the data and attempts to save the new file.  The
+export file format is determined by the extension of `filename` (`SheetJS.xlsx`
+signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
+
+The `writeFile` method uses platform-specific APIs to initiate the file save. In
+NodeJS, `fs.readFileSync` can create a file.  In the web browser, a download is
+attempted using the HTML5 `download` attribute, with fallbacks for IE.
+
+The second `opts` argument is optional.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+**Examples**
+
+<details>
+  <summary><b>Local file in a NodeJS server</b> (click to show)</summary>
+
+`writeFile` uses `fs.writeFileSync` in server environments:
+
+```js
+var XLSX = require("xlsx");
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
-/* at this point, out.xlsb is a file that you can distribute */
+XLSX.writeFile(workbook, "out.xlsb");
+```
+
+For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
+should be used to write the file data to a `Buffer` for use with `XLSX.write`:
+
+```js
+import { writeFileSync } from "fs";
+import { write } from "xlsx/xlsx.mjs";
+
+const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
+/* buf is a Buffer */
+const workbook = writeFileSync("out.xlsb", buf);
 ```
 
 </details>
 
 <details>
-  <summary><b>Photoshop ExtendScript write a file</b> (click to show)</summary>
+  <summary><b>Local file in a PhotoShop or InDesign plugin</b> (click to show)</summary>
 
 `writeFile` wraps the `File` logic in Photoshop and other ExtendScript targets.
 The specified path should be an absolute path:
 
 ```js
 #include "xlsx.extendscript.js"
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsx');
+XLSX.writeFile(workbook, "out.xlsx");
 /* at this point, out.xlsx is a file that you can distribute */
 ```
 
@@ -37,44 +82,7 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
 </details>
 
 <details>
-  <summary><b>Browser add TABLE element to page</b> (click to show)</summary>
-
-The `sheet_to_html` utility function generates HTML code that can be added to
-any DOM element.
-
-```js
-var worksheet = workbook.Sheets[workbook.SheetNames[0]];
-var container = document.getElementById('tableau');
-container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
-```
-
-</details>
-
-<details>
-  <summary><b>Browser upload file (ajax)</b> (click to show)</summary>
-
-A complete example using XHR is [included in the XHR demo](demos/xhr/), along
-with examples for fetch and wrapper libraries.  This example assumes the server
-can handle Base64-encoded files (see the demo for a basic nodejs server):
-
-```js
-/* in this example, send a base64 string to the server */
-var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
-
-var wbout = XLSX.write(workbook,wopts);
-
-var req = new XMLHttpRequest();
-req.open("POST", "/upload", true);
-var formdata = new FormData();
-formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
-formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
-req.send(formdata);
-```
-
-</details>
-
-<details>
-  <summary><b>Browser save file</b> (click to show)</summary>
+  <summary><b>Download a file in the browser to the user machine</b> (click to show)</summary>
 
 `XLSX.writeFile` wraps a few techniques for triggering a file save:
 
@@ -88,14 +96,14 @@ There is no standard way to determine if the actual file has been downloaded.
 
 ```js
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
+XLSX.writeFile(workbook, "out.xlsb");
 /* at this point, out.xlsb will have been downloaded */
 ```
 
 </details>
 
 <details>
-  <summary><b>Browser save file (compatibility)</b> (click to show)</summary>
+  <summary><b>Download a file in legacy browsers</b> (click to show)</summary>
 
 `XLSX.writeFile` techniques work for most modern browsers as well as older IE.
 For much older browsers, there are workarounds implemented by wrapper libraries.
@@ -105,7 +113,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
 
 ```js
 /* bookType can be any supported output type */
-var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
+var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
 
 var wbout = XLSX.write(workbook,wopts);
 
@@ -118,11 +126,11 @@ to generate local files, suitable for environments where ActiveX is unavailable:
 
 ```js
 Downloadify.create(id,{
-	/* other options are required! read the downloadify docs for more info */
-	filename: "test.xlsx",
-	data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
-	append: false,
-	dataType: 'base64'
+  /* other options are required! read the downloadify docs for more info */
+  filename: "test.xlsx",
+  data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
+  append: false,
+  dataType: "base64"
 });
 ```
 
@@ -130,6 +138,54 @@ The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
 
 </details>
 
+<details>
+  <summary><b>Browser upload file (ajax)</b> (click to show)</summary>
+
+A complete example using XHR is [included in the XHR demo](demos/xhr/), along
+with examples for fetch and wrapper libraries.  This example assumes the server
+can handle Base64-encoded files (see the demo for a basic nodejs server):
+
+```js
+/* in this example, send a base64 string to the server */
+var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
+
+var wbout = XLSX.write(workbook,wopts);
+
+var req = new XMLHttpRequest();
+req.open("POST", "/upload", true);
+var formdata = new FormData();
+formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
+formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
+req.send(formdata);
+```
+
+</details>
+
+<details>
+  <summary><b>PhantomJS (Headless Webkit) File Generation</b> (click to show)</summary>
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
+`fs.write` supports writing files from the main process but has a different
+interface from the NodeJS `fs` module:
+
+```js
+var XLSX = require('xlsx');
+var fs = require('fs');
+
+/* generate a binary string */
+var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
+/* write to file */
+fs.write("test.xlsx", bin, "wb");
+```
+
+Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
+to generate a workbook from HTML tables in a page in "Headless WebKit".
+
+</details>
+
+
+
 The [included demos](demos/) cover mobile apps and other special deployments.
 
 ### Writing Examples
@@ -137,3 +193,42 @@ The [included demos](demos/) cover mobile apps and other special deployments.
 - <http://sheetjs.com/demos/table.html> exporting an HTML table
 - <http://sheetjs.com/demos/writexlsx.html> generates a simple file
 
+### Streaming Write
+
+The streaming write functions are available in the `XLSX.stream` object.  They
+take the same arguments as the normal write functions but return a Readable
+Stream.  They are only exposed in NodeJS.
+
+- `XLSX.stream.to_csv` is the streaming version of `XLSX.utils.sheet_to_csv`.
+- `XLSX.stream.to_html` is the streaming version of `XLSX.utils.sheet_to_html`.
+- `XLSX.stream.to_json` is the streaming version of `XLSX.utils.sheet_to_json`.
+
+<details>
+  <summary><b>nodejs convert to CSV and write file</b> (click to show)</summary>
+
+```js
+var output_file_name = "out.csv";
+var stream = XLSX.stream.to_csv(worksheet);
+stream.pipe(fs.createWriteStream(output_file_name));
+```
+
+</details>
+
+<details>
+  <summary><b>nodejs write JSON stream to screen</b> (click to show)</summary>
+
+```js
+/* to_json returns an object-mode stream */
+var stream = XLSX.stream.to_json(worksheet, {raw:true});
+
+/* the following stream converts JS objects to text via JSON.stringify */
+var conv = new Transform({writableObjectMode:true});
+conv._transform = function(obj, e, cb){ cb(null, JSON.stringify(obj) + "\n"); };
+
+stream.pipe(conv); conv.pipe(process.stdout);
+```
+
+</details>
+
+<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
+
diff --git a/docbits/31_writestream.md b/docbits/31_writestream.md
deleted file mode 100644
index defbee4..0000000
--- a/docbits/31_writestream.md
+++ /dev/null
@@ -1,39 +0,0 @@
-### Streaming Write
-
-The streaming write functions are available in the `XLSX.stream` object.  They
-take the same arguments as the normal write functions but return a Readable
-Stream.  They are only exposed in NodeJS.
-
-- `XLSX.stream.to_csv` is the streaming version of `XLSX.utils.sheet_to_csv`.
-- `XLSX.stream.to_html` is the streaming version of `XLSX.utils.sheet_to_html`.
-- `XLSX.stream.to_json` is the streaming version of `XLSX.utils.sheet_to_json`.
-
-<details>
-  <summary><b>nodejs convert to CSV and write file</b> (click to show)</summary>
-
-```js
-var output_file_name = "out.csv";
-var stream = XLSX.stream.to_csv(worksheet);
-stream.pipe(fs.createWriteStream(output_file_name));
-```
-
-</details>
-
-<details>
-  <summary><b>nodejs write JSON stream to screen</b> (click to show)</summary>
-
-```js
-/* to_json returns an object-mode stream */
-var stream = XLSX.stream.to_json(worksheet, {raw:true});
-
-/* the following stream converts JS objects to text via JSON.stringify */
-var conv = new Transform({writableObjectMode:true});
-conv._transform = function(obj, e, cb){ cb(null, JSON.stringify(obj) + "\n"); };
-
-stream.pipe(conv); conv.pipe(process.stdout);
-```
-
-</details>
-
-<https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
-
diff --git a/docbits/32_egress.md b/docbits/32_egress.md
new file mode 100644
index 0000000..562942d
--- /dev/null
+++ b/docbits/32_egress.md
@@ -0,0 +1,217 @@
+### Generating JSON and JS Data
+
+JSON and JS data tend to represent single worksheets. The utility functions in
+this section work with single worksheets.
+
+The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
+the object structure in more detail.  `workbook.SheetNames` is an ordered list
+of the worksheet names.  `workbook.Sheets` is an object whose keys are sheet
+names and whose values are worksheet objects.
+
+The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
+
+**API**
+
+_Create an array of JS objects from a worksheet_
+
+```js
+var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
+```
+
+_Create an array of arrays of JS values from a worksheet_
+
+```js
+var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
+```
+
+The `sheet_to_json` utility function walks a workbook in row-major order,
+generating an array of objects.  The second `opts` argument controls a number of
+export decisions including the type of values (JS values or formatted text). The
+["JSON"](#json) section describes the argument in more detail.
+
+By default, `sheet_to_json` scans the first row and uses the values as headers.
+With the `header: 1` option, the function exports an array of arrays of values.
+
+**Examples**
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`stox` function for converting from a workbook to x-spreadsheet data object.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+<details>
+  <summary><b>Populating a database (SQL or no-SQL)</b> (click to show)</summary>
+
+The [`database` demo](/demos/database/) includes examples of working with
+databases and query results.
+
+</details>
+
+<details>
+  <summary><b>Numerical Computations with TensorFlow.js</b> (click to show)</summary>
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+A single `Array#map` can pull individual named rows from `sheet_to_json` export:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+const key = "age"; // this is the field we want to pull
+const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
+const tf_data = tf.tensor1d(ages);
+```
+
+All fields can be processed at once using a transpose of the 2D tensor generated
+with the `sheet_to_json` export with `header: 1`. The first row, if it contains
+header labels, should be removed with a slice:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* array of arrays of the data starting on the second row */
+const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
+/* dataset in the "correct orientation" */
+const tf_dataset = tf.tensor2d(aoa).transpose();
+/* pull out each dataset with a slice */
+const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
+const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+</details>
+
+
+### Generating HTML Tables
+
+**API**
+
+_Generate HTML Table from Worksheet_
+
+```js
+var html = XLSX.utils.sheet_to_html(worksheet);
+```
+
+The `sheet_to_html` utility function generates HTML code based on the worksheet
+data.  Each cell in the worksheet is mapped to a `<TD>` element.  Merged cells
+in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
+
+**Examples**
+
+The `sheet_to_html` utility function generates HTML code that can be added to
+any DOM element by setting the `innerHTML`:
+
+```js
+var container = document.getElementById("tavolo");
+container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
+```
+
+Combining with `fetch`, constructing a site from a workbook is straightforward:
+
+<details>
+  <summary><b>Vanilla JS + HTML fetch workbook and generate table previews</b> (click to show)</summary>
+
+```html
+<body>
+  <style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
+  <div id="tavolo"></div>
+  <script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
+  <script type="text/javascript">
+(async() => {
+  /* fetch and parse workbook -- see the fetch example for details */
+  const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+
+  let output = [];
+  /* loop through the worksheet names in order */
+  workbook.SheetNames.forEach(name => {
+
+    /* generate HTML from the corresponding worksheets */
+    const worksheet = workbook.Sheets[name];
+    const html = XLSX.utils.sheet_to_html(worksheet);
+
+    /* add a header with the title name followed by the table */
+    output.push(`<H3>${name}</H3>${html}`);
+  });
+  /* write to the DOM at the end */
+  tavolo.innerHTML = output.join("\n");
+})();
+  </script>
+</body>
+```
+
+</details>
+
+<details>
+  <summary><b>React fetch workbook and generate HTML table previews</b> (click to show)</summary>
+
+It is generally recommended to use a React-friendly workflow, but it is possible
+to generate HTML and use it in React with `dangerouslySetInnerHTML`:
+
+```jsx
+function Tabeller(props) {
+  /* the workbook object is the state */
+  const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
+
+  /* fetch and update the workbook with an effect */
+  React.useEffect(() => { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    setWorkbook(wb);
+  })(); });
+
+  return workbook.SheetNames.map(name => (<>
+    <h3>name</h3>
+    <div dangerouslySetInnerHTML={{
+      /* this __html mantra is needed to set the inner HTML */
+      __html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
+    }} />
+  </>));
+}
+```
+
+The [`react` demo](demos/react) includes more React examples.
+
+</details>
+
+<details>
+  <summary><b>VueJS fetch workbook and generate HTML table previews</b> (click to show)</summary>
+
+It is generally recommended to use a VueJS-friendly workflow, but it is possible
+to generate HTML and use it in VueJS with the `v-html` directive:
+
+```jsx
+import { read, utils } from 'xlsx';
+import { reactive } from 'vue';
+
+const S5SComponent = {
+  mounted() { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    /* loop through the worksheet names in order */
+    workbook.SheetNames.forEach(name => {
+      /* generate HTML from the corresponding worksheets */
+      const html = utils.sheet_to_html(workbook.Sheets[name]);
+      /* add to state */
+      this.wb.wb.push({ name, html });
+    });
+  })(); },
+  /* this state mantra is required for array updates to work */
+  setup() { return { wb: reactive({ wb: [] }) }; },
+  template: `
+  <div v-for="ws in wb.wb" :key="ws.name">
+    <h3>{{ ws.name }}</h3>
+    <div v-html="ws.html"></div>
+  </div>`
+};
+```
+
+The [`vuejs` demo](demos/vue) includes more React examples.
+
+</details>
+
diff --git a/misc/docs/README.md b/misc/docs/README.md
index cb54f59..332265e 100644
--- a/misc/docs/README.md
+++ b/misc/docs/README.md
@@ -40,19 +40,16 @@ port calculations to web apps; automate common spreadsheet tasks, and much more!
   * [JS Ecosystem Demos](#js-ecosystem-demos)
 - [Acquiring and Extracting Data](#acquiring-and-extracting-data)
   * [Parsing Workbooks](#parsing-workbooks)
-    + [API](#api)
-    + [Examples](#examples)
   * [Processing JSON and JS Data](#processing-json-and-js-data)
-    + [API](#api-1)
-    + [Examples](#examples-1)
   * [Processing HTML Tables](#processing-html-tables)
-    + [API](#api-2)
-    + [Examples](#examples-2)
 - [Working with the Workbook](#working-with-the-workbook)
   * [Parsing and Writing Examples](#parsing-and-writing-examples)
-- [Writing Workbooks](#writing-workbooks)
+- [Packaging and Releasing Data](#packaging-and-releasing-data)
+  * [Writing Workbooks](#writing-workbooks)
   * [Writing Examples](#writing-examples)
   * [Streaming Write](#streaming-write)
+  * [Generating JSON and JS Data](#generating-json-and-js-data)
+  * [Generating HTML Tables](#generating-html-tables)
 - [Interface](#interface)
   * [Parsing functions](#parsing-functions)
   * [Writing functions](#writing-functions)
@@ -249,7 +246,6 @@ and approaches for steps 1 and 5.
 
 Utility functions help with step 3.
 
-
 ### The Zen of SheetJS
 
 _Data processing should fit in any workflow_
@@ -508,7 +504,7 @@ Other examples are included in the [showcase](demos/showcase/).
 
 ### Parsing Workbooks
 
-#### API
+**API**
 
 _Extract data from spreadsheet bytes_
 
@@ -533,7 +529,7 @@ security risk), and attempts to read files in this way will throw an error.
 The second `opts` argument is optional. ["Parsing Options"](#parsing-options)
 covers the supported properties and behaviors.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -546,7 +542,7 @@ var XLSX = require("xlsx");
 var workbook = XLSX.readFile("test.xlsx");
 ```
 
-For Node ESM, the `readFile` helper is not enabled.  Instead, `fs.readFileSync`
+For Node ESM, the `readFile` helper is not enabled. Instead, `fs.readFileSync`
 should be used to read the file data as a `Buffer` for use with `XLSX.read`:
 
 ```js
@@ -893,8 +889,6 @@ const workbook = XLSX.read(data);
 
 
 More detailed examples are covered in the [included demos](demos/)
-
-
 ### Processing JSON and JS Data
 
 JSON and JS data tend to represent single worksheets.  This section will use a
@@ -920,7 +914,7 @@ The third argument specifies the desired worksheet name. Multiple worksheets can
 be added to a workbook by calling the function multiple times.
 
 
-#### API
+**API**
 
 _Create a worksheet from an array of arrays of JS values_
 
@@ -958,17 +952,62 @@ control the column order and header output.
 ["Array of Objects Input"](#array-of-arrays-input) describes the function and
 the optional `opts` argument in more detail.
 
-#### Examples
+**Examples**
 
 ["Zen of SheetJS"](#the-zen-of-sheetjs) contains a detailed example "Get Data
 from a JSON Endpoint and Generate a Workbook"
 
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`xtos` function for converting from x-spreadsheet data object to a workbook.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+
 The [`database` demo](/demos/database/) includes examples of working with
 databases and query results.
 
+
+
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+When recovering data from `tfjs`, the returned data points are stored in a typed
+array.  An array of arrays can be constructed with loops. `Array#unshift` can
+prepend a title row before the conversion:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* suppose xs and ys are vectors (1D tensors) -> tfarr will be a typed array */
+const tfdata = tf.stack([xs, ys]).transpose();
+const shape = tfdata.shape;
+const tfarr = tfdata.dataSync();
+
+/* construct the array of arrays */
+const aoa = [];
+for(let j = 0; j < shape[0]; ++j) {
+  aoa[j] = [];
+  for(let i = 0; i < shape[1]; ++i) aoa[j][i] = tfarr[j * shape[1] + i];
+}
+/* add headers to the top */
+aoa.unshift(["x", "y"]);
+
+/* generate worksheet */
+const worksheet = XLSX.utils.aoa_to_sheet(aoa);
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+
+
 ### Processing HTML Tables
 
-#### API
+**API**
 
 _Create a worksheet by scraping an HTML TABLE in the page_
 
@@ -996,7 +1035,7 @@ The options argument supports the same options as `table_to_sheet`, with the
 addition of a `sheet` property to control the worksheet name.  If the property
 is missing or no options are specified, the default name `Sheet1` is used.
 
-#### Examples
+**Examples**
 
 Here are a few common scenarios (click on each subtitle to see the code):
 
@@ -1071,6 +1110,107 @@ chrome.runtime.onMessage.addListener(function(msg, sender, cb) {
 ```
 
 
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks.  The core idea is to add the script to the page, parse
+the table in the page context, generate a `base64` workbook and send it back
+for further processing:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs"), puppeteer = require("puppeteer");
+
+const url = `https://sheetjs.com/demos/table`;
+
+/* get the standalone build source (node_modules/xlsx/dist/xlsx.full.min.js) */
+const lib = readFileSync(require.resolve("xlsx/dist/xlsx.full.min.js"), "utf8");
+
+(async() => {
+  /* start browser and go to web page */
+  const browser = await puppeteer.launch();
+  const page = await browser.newPage();
+  await page.goto(url, {waitUntil: "networkidle2"});
+
+  /* inject library */
+  await page.addScriptTag({content: lib});
+
+  /* this function `s5s` will be called by the script below, receiving the Base64-encoded file */
+  await page.exposeFunction("s5s", async(b64) => {
+    const workbook = XLSX.read(b64, {type: "base64" });
+
+    /* DO SOMETHING WITH workbook HERE */
+  });
+
+  /* generate XLSB file in webpage context and send back result */
+  await page.addScriptTag({content: `
+    /* call table_to_book on first table */
+    var workbook = XLSX.utils.table_to_book(document.querySelector("TABLE"));
+
+    /* generate XLSX file */
+    var b64 = XLSX.write(workbook, {type: "base64", bookType: "xlsb"});
+
+    /* call "s5s" hook exposed from the node process */
+    window.s5s(b64);
+  `});
+
+  /* cleanup */
+  await browser.close();
+})();
+```
+
+
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). The core idea
+is to add the script to the page, parse the table in the page context, generate
+a `binary` workbook and send it back for further processing:
+
+```js
+var XLSX = require('xlsx');
+var page = require('webpage').create();
+
+/* this code will be run in the page */
+var code = [ "function(){",
+  /* call table_to_book on first table */
+  "var wb = XLSX.utils.table_to_book(document.body.getElementsByTagName('table')[0]);",
+
+  /* generate XLSB file and return binary string */
+  "return XLSX.write(wb, {type: 'binary', bookType: 'xlsb'});",
+"}" ].join("");
+
+page.open('https://sheetjs.com/demos/table', function() {
+  /* Load the browser script from the UNPKG CDN */
+  page.includeJs("https://unpkg.com/xlsx/dist/xlsx.full.min.js", function() {
+    /* The code will return an XLSB file encoded as binary string */
+    var bin = page.evaluateJavaScript(code);
+
+    var workbook = XLSX.read(bin, {type: "binary"});
+    /* DO SOMETHING WITH workbook HERE */
+
+    phantom.exit();
+  });
+});
+```
+
+
+
+NodeJS does not include a DOM implementation and Puppeteer requires a hefty
+Chromium build.  [`jsdom`](https://npm.im/jsdom) is a lightweight alternative:
+
+```js
+const XLSX = require("xlsx");
+const { readFileSync } = require("fs");
+const { JSDOM } = require("jsdom");
+
+/* obtain HTML string.  This example reads from test.html */
+const html_str = fs.readFileSync("test.html", "utf8");
+/* get first TABLE element */
+const doc = new JSDOM(html_str).window.document.querySelector("table");
+/* generate workbook */
+const workbook = XLSX.utils.table_to_book(doc);
+```
+
+
 ## Working with the Workbook
 
 The full object format is described later in this README.
@@ -1145,21 +1285,65 @@ Some helper functions in `XLSX.utils` generate different views of the sheets:
 - `XLSX.utils.sheet_to_json` generates an array of objects
 - `XLSX.utils.sheet_to_formulae` generates a list of formulae
 
-## Writing Workbooks
+## Packaging and Releasing Data
 
-For writing, the first step is to generate output data.  The helper functions
-`write` and `writeFile` will produce the data in various formats suitable for
-dissemination.  The second step is to actual share the data with the end point.
-Assuming `workbook` is a workbook object:
+### Writing Workbooks
 
+**API**
 
-`XLSX.writeFile` uses `fs.writeFileSync` in server environments:
+_Generate spreadsheet bytes (file) from data_
 
 ```js
-if(typeof require !== 'undefined') XLSX = require('xlsx');
+var data = XLSX.write(workbook, opts);
+```
+
+The `write` method attempts to package data from the workbook into a file in
+memory.  By default, XLSX files are generated, but that can be controlled with
+the `bookType` property of the `opts` argument.  Based on the `type` option,
+the data can be stored as a "binary string", JS string, `Uint8Array` or Buffer.
+
+The second `opts` argument is required.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+_Generate and attempt to save file_
+
+```js
+XLSX.writeFile(workbook, filename, opts);
+```
+
+The `writeFile` method packages the data and attempts to save the new file.  The
+export file format is determined by the extension of `filename` (`SheetJS.xlsx`
+signals XLSX export, `SheetJS.xlsb` signals XLSB export, etc).
+
+The `writeFile` method uses platform-specific APIs to initiate the file save. In
+NodeJS, `fs.readFileSync` can create a file.  In the web browser, a download is
+attempted using the HTML5 `download` attribute, with fallbacks for IE.
+
+The second `opts` argument is optional.  ["Writing Options"](#writing-options)
+covers the supported properties and behaviors.
+
+**Examples**
+
+
+`writeFile` uses `fs.writeFileSync` in server environments:
+
+```js
+var XLSX = require("xlsx");
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
-/* at this point, out.xlsb is a file that you can distribute */
+XLSX.writeFile(workbook, "out.xlsb");
+```
+
+For Node ESM, the `writeFile` helper is not enabled. Instead, `fs.writeFileSync`
+should be used to write the file data to a `Buffer` for use with `XLSX.write`:
+
+```js
+import { writeFileSync } from "fs";
+import { write } from "xlsx/xlsx.mjs";
+
+const buf = write(workbook, {type: "buffer", bookType: "xlsb"});
+/* buf is a Buffer */
+const workbook = writeFileSync("out.xlsb", buf);
 ```
 
 
@@ -1169,8 +1353,9 @@ The specified path should be an absolute path:
 
 ```js
 #include "xlsx.extendscript.js"
+
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsx');
+XLSX.writeFile(workbook, "out.xlsx");
 /* at this point, out.xlsx is a file that you can distribute */
 ```
 
@@ -1178,37 +1363,6 @@ The [`extendscript` demo](demos/extendscript/) includes a more complex example.
 
 
 
-The `sheet_to_html` utility function generates HTML code that can be added to
-any DOM element.
-
-```js
-var worksheet = workbook.Sheets[workbook.SheetNames[0]];
-var container = document.getElementById('tableau');
-container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
-```
-
-
-
-A complete example using XHR is [included in the XHR demo](demos/xhr/), along
-with examples for fetch and wrapper libraries.  This example assumes the server
-can handle Base64-encoded files (see the demo for a basic nodejs server):
-
-```js
-/* in this example, send a base64 string to the server */
-var wopts = { bookType:'xlsx', bookSST:false, type:'base64' };
-
-var wbout = XLSX.write(workbook,wopts);
-
-var req = new XMLHttpRequest();
-req.open("POST", "/upload", true);
-var formdata = new FormData();
-formdata.append('file', 'test.xlsx'); // <-- server expects `file` to hold name
-formdata.append('data', wbout); // <-- `data` holds the base64-encoded data
-req.send(formdata);
-```
-
-
-
 `XLSX.writeFile` wraps a few techniques for triggering a file save:
 
 - `URL` browser API creates an object URL for the file, which the library uses
@@ -1221,7 +1375,7 @@ There is no standard way to determine if the actual file has been downloaded.
 
 ```js
 /* output format determined by filename */
-XLSX.writeFile(workbook, 'out.xlsb');
+XLSX.writeFile(workbook, "out.xlsb");
 /* at this point, out.xlsb will have been downloaded */
 ```
 
@@ -1235,7 +1389,7 @@ Note: `XLSX.writeFile` will automatically call `saveAs` if available.
 
 ```js
 /* bookType can be any supported output type */
-var wopts = { bookType:'xlsx', bookSST:false, type:'array' };
+var wopts = { bookType:"xlsx", bookSST:false, type:"array" };
 
 var wbout = XLSX.write(workbook,wopts);
 
@@ -1248,17 +1402,59 @@ to generate local files, suitable for environments where ActiveX is unavailable:
 
 ```js
 Downloadify.create(id,{
-	/* other options are required! read the downloadify docs for more info */
-	filename: "test.xlsx",
-	data: function() { return XLSX.write(wb, {bookType:"xlsx", type:'base64'}); },
-	append: false,
-	dataType: 'base64'
+  /* other options are required! read the downloadify docs for more info */
+  filename: "test.xlsx",
+  data: function() { return XLSX.write(wb, {bookType:"xlsx", type:"base64"}); },
+  append: false,
+  dataType: "base64"
 });
 ```
 
 The [`oldie` demo](demos/oldie/) shows an IE-compatible fallback scenario.
 
 
+
+A complete example using XHR is [included in the XHR demo](demos/xhr/), along
+with examples for fetch and wrapper libraries.  This example assumes the server
+can handle Base64-encoded files (see the demo for a basic nodejs server):
+
+```js
+/* in this example, send a base64 string to the server */
+var wopts = { bookType:"xlsx", bookSST:false, type:"base64" };
+
+var wbout = XLSX.write(workbook,wopts);
+
+var req = new XMLHttpRequest();
+req.open("POST", "/upload", true);
+var formdata = new FormData();
+formdata.append("file", "test.xlsx"); // <-- server expects `file` to hold name
+formdata.append("data", wbout); // <-- `data` holds the base64-encoded data
+req.send(formdata);
+```
+
+
+
+The [`headless` demo](demos/headless/) includes a complete demo to convert HTML
+files to XLSB workbooks using [PhantomJS](https://phantomjs.org/). PhantomJS
+`fs.write` supports writing files from the main process but has a different
+interface from the NodeJS `fs` module:
+
+```js
+var XLSX = require('xlsx');
+var fs = require('fs');
+
+/* generate a binary string */
+var bin = XLSX.write(workbook, { type:"binary", bookType: "xlsx" });
+/* write to file */
+fs.write("test.xlsx", bin, "wb");
+```
+
+Note: The section ["Processing HTML Tables"](#processing-html-tables) shows how
+to generate a workbook from HTML tables in a page in "Headless WebKit".
+
+
+
+
 The [included demos](demos/) cover mobile apps and other special deployments.
 
 ### Writing Examples
@@ -1299,6 +1495,208 @@ stream.pipe(conv); conv.pipe(process.stdout);
 
 <https://github.com/sheetjs/sheetaki> pipes write streams to nodejs response.
 
+### Generating JSON and JS Data
+
+JSON and JS data tend to represent single worksheets. The utility functions in
+this section work with single worksheets.
+
+The ["Common Spreadsheet Format"](#common-spreadsheet-format) section describes
+the object structure in more detail.  `workbook.SheetNames` is an ordered list
+of the worksheet names.  `workbook.Sheets` is an object whose keys are sheet
+names and whose values are worksheet objects.
+
+The "first worksheet" is stored at `workbook.Sheets[workbook.SheetNames[0]]`.
+
+**API**
+
+_Create an array of JS objects from a worksheet_
+
+```js
+var jsa = XLSX.utils.sheet_to_json(worksheet, opts);
+```
+
+_Create an array of arrays of JS values from a worksheet_
+
+```js
+var aoa = XLSX.utils.sheet_to_json(worksheet, {...opts, header: 1});
+```
+
+The `sheet_to_json` utility function walks a workbook in row-major order,
+generating an array of objects.  The second `opts` argument controls a number of
+export decisions including the type of values (JS values or formatted text). The
+["JSON"](#json) section describes the argument in more detail.
+
+By default, `sheet_to_json` scans the first row and uses the values as headers.
+With the `header: 1` option, the function exports an array of arrays of values.
+
+**Examples**
+
+[`x-spreadsheet`](https://github.com/myliang/x-spreadsheet) is an interactive
+data grid for previewing and modifying structured data in the web browser.  The
+[`xspreadsheet` demo](/demos/xspreadsheet) includes a sample script with the
+`stox` function for converting from a workbook to x-spreadsheet data object.
+<https://oss.sheetjs.com/sheetjs/x-spreadsheet> is a live demo.
+
+
+The [`database` demo](/demos/database/) includes examples of working with
+databases and query results.
+
+
+
+[`@tensorflow/tfjs`](@tensorflow/tfjs) and other libraries expect data in simple
+arrays, well-suited for worksheets where each column is a data vector.  That is
+the transpose of how most people use spreadsheets, where each row is a vector.
+
+A single `Array#map` can pull individual named rows from `sheet_to_json` export:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+const key = "age"; // this is the field we want to pull
+const ages = XLSX.utils.sheet_to_json(worksheet).map(r => r[key]);
+const tf_data = tf.tensor1d(ages);
+```
+
+All fields can be processed at once using a transpose of the 2D tensor generated
+with the `sheet_to_json` export with `header: 1`. The first row, if it contains
+header labels, should be removed with a slice:
+
+```js
+const XLSX = require("xlsx");
+const tf = require('@tensorflow/tfjs');
+
+/* array of arrays of the data starting on the second row */
+const aoa = XLSX.utils.sheet_to_json(worksheet, {header: 1}).slice(1);
+/* dataset in the "correct orientation" */
+const tf_dataset = tf.tensor2d(aoa).transpose();
+/* pull out each dataset with a slice */
+const tf_field0 = tf_dataset.slice([0,0], [1,tensor.shape[1]]).flatten();
+const tf_field1 = tf_dataset.slice([1,0], [1,tensor.shape[1]]).flatten();
+```
+
+The [`array` demo](demos/array/) shows a complete example.
+
+
+
+### Generating HTML Tables
+
+**API**
+
+_Generate HTML Table from Worksheet_
+
+```js
+var html = XLSX.utils.sheet_to_html(worksheet);
+```
+
+The `sheet_to_html` utility function generates HTML code based on the worksheet
+data.  Each cell in the worksheet is mapped to a `<TD>` element.  Merged cells
+in the worksheet are serialized by setting `colspan` and `rowspan` attributes.
+
+**Examples**
+
+The `sheet_to_html` utility function generates HTML code that can be added to
+any DOM element by setting the `innerHTML`:
+
+```js
+var container = document.getElementById("tavolo");
+container.innerHTML = XLSX.utils.sheet_to_html(worksheet);
+```
+
+Combining with `fetch`, constructing a site from a workbook is straightforward:
+
+
+```html
+<body>
+  <style>TABLE { border-collapse: collapse; } TD { border: 1px solid; }</style>
+  <div id="tavolo"></div>
+  <script src="https://unpkg.com/xlsx/dist/xlsx.full.min.js"></script>
+  <script type="text/javascript">
+(async() => {
+  /* fetch and parse workbook -- see the fetch example for details */
+  const workbook = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+
+  let output = [];
+  /* loop through the worksheet names in order */
+  workbook.SheetNames.forEach(name => {
+
+    /* generate HTML from the corresponding worksheets */
+    const worksheet = workbook.Sheets[name];
+    const html = XLSX.utils.sheet_to_html(worksheet);
+
+    /* add a header with the title name followed by the table */
+    output.push(`<H3>${name}</H3>${html}`);
+  });
+  /* write to the DOM at the end */
+  tavolo.innerHTML = output.join("\n");
+})();
+  </script>
+</body>
+```
+
+
+
+It is generally recommended to use a React-friendly workflow, but it is possible
+to generate HTML and use it in React with `dangerouslySetInnerHTML`:
+
+```jsx
+function Tabeller(props) {
+  /* the workbook object is the state */
+  const [workbook, setWorkbook] = React.useState(XLSX.utils.book_new());
+
+  /* fetch and update the workbook with an effect */
+  React.useEffect(() => { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const wb = XLSX.read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    setWorkbook(wb);
+  })(); });
+
+  return workbook.SheetNames.map(name => (<>
+    <h3>name</h3>
+    <div dangerouslySetInnerHTML={{
+      /* this __html mantra is needed to set the inner HTML */
+      __html: XLSX.utils.sheet_to_html(workbook.Sheets[name])
+    }} />
+  </>));
+}
+```
+
+The [`react` demo](demos/react) includes more React examples.
+
+
+
+It is generally recommended to use a VueJS-friendly workflow, but it is possible
+to generate HTML and use it in VueJS with the `v-html` directive:
+
+```jsx
+import { read, utils } from 'xlsx';
+import { reactive } from 'vue';
+
+const S5SComponent = {
+  mounted() { (async() => {
+    /* fetch and parse workbook -- see the fetch example for details */
+    const workbook = read(await (await fetch("sheetjs.xlsx")).arrayBuffer());
+    /* loop through the worksheet names in order */
+    workbook.SheetNames.forEach(name => {
+      /* generate HTML from the corresponding worksheets */
+      const html = utils.sheet_to_html(workbook.Sheets[name]);
+      /* add to state */
+      this.wb.wb.push({ name, html });
+    });
+  })(); },
+  /* this state mantra is required for array updates to work */
+  setup() { return { wb: reactive({ wb: [] }) }; },
+  template: `
+  <div v-for="ws in wb.wb" :key="ws.name">
+    <h3>{{ ws.name }}</h3>
+    <div v-html="ws.html"></div>
+  </div>`
+};
+```
+
+The [`vuejs` demo](demos/vue) includes more React examples.
+
+
 ## Interface
 
 `XLSX` is the exposed variable in the browser and the exported node variable
diff --git a/misc/docs/SUMMARY.md b/misc/docs/SUMMARY.md
index 186a8ab..5bed99b 100644
--- a/misc/docs/SUMMARY.md
+++ b/misc/docs/SUMMARY.md
@@ -8,19 +8,16 @@
   * [JS Ecosystem Demos](README.md#js-ecosystem-demos)
 - [Acquiring and Extracting Data](README.md#acquiring-and-extracting-data)
   * [Parsing Workbooks](README.md#parsing-workbooks)
-    + [API](README.md#api)
-    + [Examples](README.md#examples)
   * [Processing JSON and JS Data](README.md#processing-json-and-js-data)
-    + [API](README.md#api-1)
-    + [Examples](README.md#examples-1)
   * [Processing HTML Tables](README.md#processing-html-tables)
-    + [API](README.md#api-2)
-    + [Examples](README.md#examples-2)
 - [Working with the Workbook](README.md#working-with-the-workbook)
   * [Parsing and Writing Examples](README.md#parsing-and-writing-examples)
-- [Writing Workbooks](README.md#writing-workbooks)
+- [Packaging and Releasing Data](README.md#packaging-and-releasing-data)
+  * [Writing Workbooks](README.md#writing-workbooks)
   * [Writing Examples](README.md#writing-examples)
   * [Streaming Write](README.md#streaming-write)
+  * [Generating JSON and JS Data](README.md#generating-json-and-js-data)
+  * [Generating HTML Tables](README.md#generating-html-tables)
 - [Interface](README.md#interface)
   * [Parsing functions](README.md#parsing-functions)
   * [Writing functions](README.md#writing-functions)
diff --git a/types/index.d.ts b/types/index.d.ts
index 080de11..d2801b4 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -22,7 +22,7 @@ export function writeFile(data: WorkBook, filename: string, opts?: WritingOption
 type CBFunc = () => void;
 export function writeFileAsync(filename: string, data: WorkBook, opts: WritingOptions | CBFunc, cb?: CBFunc): any;
 /** Attempts to write the workbook data */
-export function write(data: WorkBook, opts?: WritingOptions): any;
+export function write(data: WorkBook, opts: WritingOptions): any;
 
 /** Utility Functions */
 export const utils: XLSX$Utils;
@@ -261,7 +261,7 @@ export interface WorkBook {
     Props?: FullProperties;
 
     /** Custom workbook Properties */
-    Custprops?: any;
+    Custprops?: object;
 
     Workbook?: WBProps;