Import monaco-editor using Vite 2

Question

Currently, I have set up a Vite 2 project with monaco-editor as a dependency.

Whenever I am trying to use it says that the workers are not imported.

editorSimpleWorker.js:454 Uncaught (in promise) Error: Unexpected usage
    at EditorSimpleWorker.loadForeignModule (editorSimpleWorker.js:454)
    at webWorker.js:38

Since I am using Vite 2 I have assumed that simply specifying the rollup plugin rollup-plugin-monaco-editor in the plugins array. However, I am still getting this issue.

export default defineConfig({
  plugins: [
    vue(),
    monaco({ languages: ['javascript'] }),
  ],
});

Is there any proper way to import monaco-editor into a Vite 2 project?

Answer 1

With the latest release (2.0.0-beta.59) it is fixed.

You can now add the environment workers without any further configuration (ref: https://github.com/vitejs/vite/discussions/1791)

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(_, 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()
  }
}