sheetjs-clone/demos/rollup/README.md

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# Rollup
This library presents itself as a CommonJS library, so some configuration is
required. The examples at <https://rollupjs.org> can be followed pretty much in
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verbatim. This sample demonstrates a bundle for browser as well as for node.
This demo uses the `import` form to expose the whole library, enabling client
code to access the library with `import XLSX from 'xlsx'`. The JS code from
the root demo was moved to a separate `app.js` script.
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## Required Plugins
The `rollup-plugin-node-resolve` and `rollup-plugin-commonjs` plugins are used:
```js
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
export default {
/* ... */
plugins: [
resolve({
module: false, // <-- this library is not an ES6 module
browser: true, // <-- suppress node-specific features
}),
commonjs()
],
/* ... */
};
```
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For the browser deployments, the output format is `'iife'`. For node, the
output format is `'cjs'`.
### Worker Scripts
Rollup can also bundle worker scripts! Instead of using `importScripts`, the
worker script should import the module:
```diff
-importScripts('dist/xlsx.full.min.js');
+import XLSX from 'xlsx';
```
[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-xlsx?pixel)](https://github.com/SheetJS/js-xlsx)