monaco-editor/docs/integrate-esm.md

## Integrating the ESM version of the Monaco Editor

### Using webpack

Here is the most basic script that imports the editor using ESM with webpack.

More self-contained samples are available at [monaco-editor-samples](https://github.com/Microsoft/monaco-editor-samples).

* `index.js`
```js
import * as monaco from 'monaco-editor';

// Since packaging is done by you, you need
// to instruct the editor how you named the
// bundles that contain the web workers.
self.MonacoEnvironment = {
    getWorkerUrl: function (moduleId, label) {
        if (label === 'json') {
            return './json.worker.bundle.js';
        }
        if (label === 'css') {
            return './css.worker.bundle.js';
        }
        if (label === 'html') {
            return './html.worker.bundle.js';
        }
        if (label === 'typescript' || label === 'javascript') {
            return './ts.worker.bundle.js';
        }
        return './editor.worker.bundle.js';
    }
}

monaco.editor.create(document.getElementById('container'), {
    value: [
        'function x() {',
        '\tconsole.log("Hello world!");',
        '}'
    ].join('\n'),
    language: 'javascript'
});
```

* `webpack.config.js`:
```js
const path = require('path');
const webpack = require('webpack');

module.exports = {
    entry: {
        "app": './index.js',
        // Package each language's worker and give these filenames in `getWorkerUrl`
        "editor.worker": 'monaco-editor/esm/vs/editor/editor.worker.js',
        "json.worker": 'monaco-editor/esm/vs/language/json/json.worker',
        "css.worker": 'monaco-editor/esm/vs/language/css/css.worker',
        "html.worker": 'monaco-editor/esm/vs/language/html/html.worker',
        "ts.worker": 'monaco-editor/esm/vs/language/typescript/ts.worker',
    },
    output: {
        filename: '[name].bundle.js',
        path: path.resolve(__dirname, 'dist')
    },
    module: {
        rules: [{
            test: /\.css$/,
            use: [ 'style-loader', 'css-loader' ]
        }]
    },
    plugins: [
        // Ignore require() calls in vs/language/typescript/lib/typescriptServices.js
        new webpack.IgnorePlugin(
            /^((fs)|(path)|(os)|(crypto)|(source-map-support))$/,
            /vs\/language\/typescript\/lib/
        )
    ]
};

```