---
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  summary: Import ECMAScript Modules and TypeScript definitions
---

import current from '/version.js';
import Tabs from '@theme/Tabs';
import TabItem from '@theme/TabItem';

# Deno

Module scripts and type definitions are available at <https://cdn.sheetjs.com/>.

Using the URL imports, `deno run` will automatically download scripts and types:

<pre><code parentName="pre" {...{"className": "language-ts"}}>{`\
// @deno-types="https://cdn.sheetjs.com/xlsx-${current}/package/types/index.d.ts"
import * as XLSX from 'https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs';`}
</code></pre>

The `@deno-types` comment instructs Deno to use the type definitions.

:::caution Deno support is considered experimental.

Great open source software grows with user tests and reports. Any issues should
be reported to the Deno project for further diagnosis.

:::

## Encoding support

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

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

## Node Compatibility Mode

:::caution

Node Compatibility Mode is useful for migrating existing NodeJS scripts to Deno.
It is considered unstable by the platform developers.

For greenfield Deno projects, HTTP imports are strongly recommended.

:::

The ["NodeJS" installation section](/docs/getting-started/installation/nodejs)
includes instructions for installing the NodeJS package.

After installing, the `std/node` require can be used directly:

```ts
/* load the `require` machinery */
import { createRequire } from "https://deno.land/std/node/module.ts";
const require = createRequire(import.meta.url);

/* require the library */
const XLSX = require("xlsx");
```

## Upgrade Notes

Upgrading to the latest version involves changing the import URLs.  The import
and the types URLs should be updated at the same time:

<pre><code parentName="pre" {...{"className": "language-diff"}}>{`\
-// @deno-types="https://cdn.sheetjs.com/xlsx-0.18.3/package/types/index.d.ts"
+// @deno-types="https://cdn.sheetjs.com/xlsx-${current}/package/types/index.d.ts"

-import * as XLSX from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/xlsx.mjs';
+import * as XLSX from 'https://cdn.sheetjs.com/xlsx-${current}/package/xlsx.mjs';

-import * as cptable from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/dist/cpexcel.full.mjs';
+import * as cptable from 'https://cdn.sheetjs.com/xlsx-${current}/package/dist/cpexcel.full.mjs';
`}
</code></pre>

#### Deno Registry

:::warning

The official Deno registry is out of date.  This is a registry bug.

<https://cdn.sheetjs.com/> is the authoritative source for SheetJS scripts.

:::

Applications using the Deno registry can migrate by changing the URLs.

<Tabs>
  <TabItem value="v" label="URL with version">

The SheetJS CDN version has no `v`.  For example, `v0.18.3` maps to `0.18.3`:

```diff
-// @deno-types="https://deno.land/x/sheetjs@v0.18.3/types/index.d.ts"
+// @deno-types="https://cdn.sheetjs.com/xlsx-0.18.3/package/types/index.d.ts"

-import * as XLSX from 'https://deno.land/x/sheetjs@v0.18.3/xlsx.mjs';
+import * as XLSX from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/xlsx.mjs';

-import * as cptable from 'https://deno.land/x/sheetjs@v0.18.3/dist/cpexcel.full.mjs';
+import * as cptable from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/dist/cpexcel.full.mjs';
```

  </TabItem>
  <TabItem value="nov" label="URL without version">

Version-less imports (`https://deno.land/x/sheetjs/xlsx.mjs`) map to `0.18.3`:

```diff
-// @deno-types="https://deno.land/x/sheetjs/types/index.d.ts"
+// @deno-types="https://cdn.sheetjs.com/xlsx-0.18.3/package/types/index.d.ts"

-import * as XLSX from 'https://deno.land/x/sheetjs/xlsx.mjs';
+import * as XLSX from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/xlsx.mjs';

-import * as cptable from 'https://deno.land/x/sheetjs/dist/cpexcel.full.mjs';
+import * as cptable from 'https://cdn.sheetjs.com/xlsx-0.18.3/package/dist/cpexcel.full.mjs';
```

  </TabItem>
</Tabs>