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MaxenceMouchard Oct 8, 2025
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MaxenceMouchard Oct 8, 2025
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76 changes: 52 additions & 24 deletions docs/integrate-esm.md
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Expand Up @@ -193,32 +193,27 @@ Adding monaco editor to [Vite](https://vitejs.dev/) is simple since it has built
```js
import * as monaco from 'monaco-editor';

import EditorWorker from "monaco-editor/esm/vs/editor/editor.worker?worker";
import JsonWorker from "monaco-editor/esm/vs/language/json/json.worker?worker";
import CssWorker from "monaco-editor/esm/vs/language/css/css.worker?worker";
import HtmlWorker from "monaco-editor/esm/vs/language/html/html.worker?worker";
import TsWorker from "monaco-editor/esm/vs/language/typescript/ts.worker?worker";

self.MonacoEnvironment = {
getWorker: function (workerId, label) {
const getWorkerModule = (moduleUrl, label) => {
return new Worker(self.MonacoEnvironment.getWorkerUrl(moduleUrl), {
name: label,
type: 'module'
});
};

switch (label) {
case 'json':
return getWorkerModule('/monaco-editor/esm/vs/language/json/json.worker?worker', label);
case 'css':
case 'scss':
case 'less':
return getWorkerModule('/monaco-editor/esm/vs/language/css/css.worker?worker', label);
case 'html':
case 'handlebars':
case 'razor':
return getWorkerModule('/monaco-editor/esm/vs/language/html/html.worker?worker', label);
case 'typescript':
case 'javascript':
return getWorkerModule('/monaco-editor/esm/vs/language/typescript/ts.worker?worker', label);
default:
return getWorkerModule('/monaco-editor/esm/vs/editor/editor.worker?worker', label);
getWorker(_, label) {
if (label === "json") {
return new JsonWorker();
}
if (label === "css" || label === "scss" || label === "less") {
return new CssWorker();
}
if (label === "html" || label === "handlebars" || label === "razor") {
return new HtmlWorker();
}
if (label === "typescript" || label === "javascript") {
return new TsWorker();
}
return new EditorWorker();
}
};

Expand All @@ -227,3 +222,36 @@ monaco.editor.create(document.getElementById('container'), {
language: 'javascript'
});
```

> [!NOTE]
> If you are running your frontend on a port that is different from the origin domain where the workers are evaluated,
> you will encounter cross-origin errors.
>
> In this scenario, you can use a blob like this:
> ```js
> self.MonacoEnvironment = {
> getWorker(_, label) {
> function createBlobWorker(workerModule) {
> const code = workerModule.toString();
> const blob = new Blob([code], { type: 'application/javascript' });
> const blobUrl = URL.createObjectURL(blob);
> return new Worker(blobUrl, { type: 'module' });
> }
>
> if (label === "json") {
> return createBlobWorker(JsonWorker);
> }
> if (label === "css" || label === "scss" || label === "less") {
> return createBlobWorker(CssWorker);
> }
> if (label === "html" || label === "handlebars" || label === "razor") {
> return createBlobWorker(HtmlWorker);
> }
> if (label === "typescript" || label === "javascript") {
> return createBlobWorker(TsWorker);
> }
>
> return createBlobWorker(EditorWorker);
> }
> };
> ```