---
title: Standalone Browser Scripts
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sidebar_position: 1
sidebar_custom_props:
  summary: Classic pages with simple <script> tags
---

import current from '/version.js';
import CodeBlock from '@theme/CodeBlock';

Each standalone release script is available at https://cdn.sheetjs.com/.

<p>The current version is {current} and can be referenced as follows:</p>

<CodeBlock language="html">{`\
<!-- use version ${current} -->
<script lang="javascript" src="https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.full.min.js"></script>`}
</CodeBlock>

:::tip pass

[Watch the repo](https://git.sheetjs.com/SheetJS/sheetjs) or subscribe to the
[RSS feed](https://git.sheetjs.com/sheetjs/sheetjs/tags.rss) to be notified when
new versions are released!

:::

:::danger pass

A number of services host older versions of the SheetJS libraries.  Due to
syncing issues, they are generally out of date.

**The SheetJS CDN** https://cdn.sheetjs.com/ **is the authoritative source**
**for SheetJS scripts**

:::

## Browser Scripts

`xlsx.full.min.js` is the complete standalone script. It includes support for
reading and writing many spreadsheet formats.

<CodeBlock language="html">{`\
<!-- use xlsx.full.min.js from version ${current} -->
<script lang="javascript" src="https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.full.min.js"></script>`}
</CodeBlock>

`xlsx.mini.min.js` is a slimmer build that omits the following features:

- CSV and SYLK encodings (directly affecting users outside of the United States)
- XLSB / XLS / Lotus 1-2-3 / SpreadsheetML 2003 / Numbers file formats
- [Stream utility functions](/docs/api/stream)

<details>
  <summary><b>How to integrate the mini build</b> (click to show)</summary>

Replace references to `xlsx.full.min.js` with `xlsx.mini.min.js`.  Starting from
scratch, a single script tag should be added at the top of the HTML page:

<CodeBlock language="html">{`\
<!-- use xlsx.mini.min.js from version ${current} -->
<script lang="javascript" src="https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.mini.min.js"></script>`}
</CodeBlock>

</details>

### Vendoring

For general stability, making a local copy of SheetJS scripts ("vendoring") is
strongly recommended. Vendoring decouples websites from SheetJS infrastructure.

<ol start="1"><li><p>Download the script (<code parentName="pre">xlsx.full.min.js</code>) for
   the desired version. The current version is available at <a href={"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/xlsx.full.min.js"}>{"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/xlsx.full.min.js"}</a></p></li></ol>

2) Move the script to a `public` folder with other scripts.

3) Reference the local script from HTML pages:

```html
<script src="/public/xlsx.full.min.js"></script>
```

This script assigns to `window.XLSX`. The global can be used in other scripts.

### Internet Explorer and Older Browsers

For broad compatibility with JavaScript engines, the library is written using
ECMAScript 3 language dialect.  A "shim" script provides implementations of
functions for older browsers and environments.

Due to SSL compatibility issues, older versions of IE will not be able to use
the CDN scripts directly. They should be downloaded and saved to a public path:

<ul>
<li>Standalone: <a href={"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/xlsx.mini.min.js"}>{"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/xlsx.mini.min.js"}</a></li>
<li>Shim: <a href={"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/shim.min.js"}>{"https://cdn.sheetjs.com/xlsx-" + current + "/package/dist/shim.min.js"}</a></li>
</ul>

A `script` reference to the shim must be added before the standalone script:

```html
<!-- add the shim first -->
<script type="text/javascript" src="shim.min.js"></script>
<!-- after the shim is referenced, add the library -->
<script type="text/javascript" src="xlsx.full.min.js"></script>
```

### Web Workers

The standalone scripts can be loaded using `importScripts` at the top of the
worker scripts:

<CodeBlock language="js">{`\
importScripts("https://cdn.sheetjs.com/xlsx-${current}/package/dist/shim.min.js");
importScripts("https://cdn.sheetjs.com/xlsx-${current}/package/dist/xlsx.full.min.js");`}
</CodeBlock>

### Type Checker

:::danger VSCode Telemetry and Data Exfiltration

The official Microsoft builds of Visual Studio Code ("VSCode") embed telemetry
and send information to external servers.

**[VSCodium](https://vscodium.com/) is a telemetry-free fork of VSCode.**

When writing code that may process personally identifiable information (PII),
the SheetJS team strongly encourages building VSCode from source or using IDEs
that do not exfiltrate data.

:::

The type checker integrated in VSCodium and VSCode do not currently provide type
hints when using the standalone build. Using the JSDoc `@type` directive coupled
with type imports, VSCodium will recognize the types:

![VSCodium types](pathname:///files/standalone-types.png)

<ol start="1">
<li><p>Download the types (<code parentName="pre">index.d.ts</code>) for
   the desired version. The current version is available at <a href={"https://cdn.sheetjs.com/xlsx-" + current + "/package/types/index.d.ts"}>{"https://cdn.sheetjs.com/xlsx-" + current + "/package/types/index.d.ts"}</a></p></li>
</ol>

2) Rename the types file to `xlsx.d.ts`. It does not need to reside in the same
folder as the standalone script.

3) In the browser script referencing the global, prepend the following lines:

```js title="Prepend this fragment in each source file referencing the XLSX global"
/** @type {import("./xlsx")} */
const XLSX = globalThis.XLSX;
```

4) If the `xlsx.d.ts` file is in a different folder, change the argument to the
`import` method to reflect the relative path. For example, given the structure:

```text title="Folder Structure"
- /vendor
  - /vendor/xlsx.ts
- /src
  - /src/app.js
```

`/src/app.js` must refer to the types as `../vendor/xlsx`:

```js title="Preamble for /src/app.js when types are at /vendor/xlsx.d.ts"
// highlight-next-line
/** @type {import("../vendor/xlsx")} */
const XLSX = globalThis.XLSX;
```

The `.d.ts` file extension must be omitted.

:::warning pass

JSDoc types using the `@import` directive are not supported in `<script>` tags.

**This is a known bug with VSCode!**

:::

## ECMAScript Module Imports

:::caution pass

This section refers to imports in HTML pages using `<script type="module">`.

The ["Frameworks and Bundlers"](/docs/getting-started/installation/frameworks)
section covers imports in projects using bundlers (ViteJS) or frameworks
(Kaioken / ReactJS / Angular / VueJS / Svelte)

:::

The ECMAScript Module build is saved to `xlsx.mjs` and can be directly added to
a page with a `script` tag using `type="module"`:

<CodeBlock language="html">{`\
<script type="module">
import { read, writeFileXLSX } from "https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs";
</script>`}
</CodeBlock>

If Encoding support is required, `cpexcel.full.mjs` must be manually imported:

<CodeBlock language="html">{`\
<script type="module">
/* load the codepage support library for extended support with older formats  */
import { set_cptable } from "https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs";
import * as cptable from 'https://cdn.sheetjs.com/xlsx-${current}/package/dist/cpexcel.full.mjs';
set_cptable(cptable);
</script>`}
</CodeBlock>

Web Worker support is noted in [the "Web Workers" demo](/docs/demos/bigdata/worker#installation)

### Dynamic Imports

Dynamic imports with `import()` will only download the SheetJS scripts when they
are used. This example will download the library when data is exported:

<CodeBlock language="html">{`\
<button id="xport">Export</button>
<script type="module">
xport.addEventListener("click", async() => {
\n\
  /* dynamically import the script in the event listener */
  // highlight-next-line
  const XLSX = await import("https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs");
\n\
  const wb = XLSX.utils.book_new();
  const ws = XLSX.utils.aoa_to_sheet([["a","b","c"],[1,2,3]]);
  XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
  XLSX.writeFile(wb, "SheetJSESMTest.xlsx");
});
</script>`}
</CodeBlock>

:::caution pass

The callback functions must be marked as `async` and the script block must have
the attribute `type="module"`

:::

If Encoding support is required, `cpexcel.full.mjs` must be manually imported:

<CodeBlock language="html">{`\
<button id="xport">Export</button>
<script type="module">
xport.addEventListener("click", async() => {
\n\
  /* dynamically import the scripts in the event listener */
  // highlight-start
  const XLSX = await import("https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs");
  const cptable = await import("https://cdn.sheetjs.com/xlsx-${current}/package/dist/cpexcel.full.mjs");
  XLSX.set_cptable(cptable);
  // highlight-end
\n\
  const wb = XLSX.utils.book_new();
  const ws = XLSX.utils.aoa_to_sheet([["a","b","c"],[1,2,3]]);
  XLSX.utils.book_append_sheet(wb, ws, "Sheet1");
  XLSX.writeFile(wb, "SheetJSESMTest.xlsx");
});
</script>`}
</CodeBlock>

## Bower

:::danger pass

Bower is deprecated and the maintainers recommend using other tools.

:::

The Bower package manager supports tarballs from the SheetJS CDN:

<CodeBlock language="bash">{`\
npx bower install https://cdn.sheetjs.com/xlsx-${current}/xlsx-${current}.tgz`}
</CodeBlock>

Bower will place the standalone scripts in `bower_components/js-xlsx/dist/`
