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New Vite Plugin Monaco Editor Support ESM

A plugin to simplify loading the Monaco Editor with vite.

• It uses Vite specific plugin hooks: configResolved, configureServer, transformIndexHtml.
• It uses esbuild to bundle worker in the node_modules/.monaco directory, via the server.middlewares proxy http server for the bundle worker.

Installing

// make sure you have it installed monaco-editor.
pnpm install -D vite-plugin-monaco-editor-esm

// or
yarn add vite-plugin-monaco-editor-esm -D

// or
npm install --save-dev vite-plugin-monaco-editor-esm

Using

• vite.config.ts:

import { defineConfig } from 'vite'
import monacoEditorEsmPlugin from 'vite-plugin-monaco-editor-esm'

export default defineConfig({
  plugins: [monacoEditorEsmPlugin()],
})

Import all monaco functions

• index.ts:

import * as monaco from 'monaco-editor'

monaco.editor.create(document.getElementById('container'), {
  value: 'console.log("Hello, world")',
  language: 'javascript',
})

Import part of monaco functions

The import * as monaco from 'monaco-editor' is import all features and languages of the Monaco Editor. Assume you only need part of the features and languages:

• customMonaco.ts

import 'monaco-editor/esm/vs/editor/editor.all.js'
import * as monaco from 'monaco-editor/esm/vs/editor/editor.api'

export { monaco }

The Complete list of imports: customMonaco.ts

• index.ts

import { monaco } from './customMonaco.ts'
monaco.editor.create(document.getElementById('container'), {
  value: 'console.log("Hello, world")',
  language: 'javascript',
})

Options

• languageWorkers (string[]) - include only a subset of the languageWorkers supported.

  • default value: ['editorWorkerService', 'css', 'html', 'json', 'typescript'].
  • Assuming only use css worker(editorWorkerService is must include base worker), you can set ['editorWorkerService', 'css']

• customWorkers (IWorkerDefinition[]) - include your custom worker.

  • default value: []
  • example value: [{label: "graphql", entry: "monaco-graphql/esm/graphql.worker"}], The entry is relative path in the node_modules Or you can set absolute path.

• publicPath (string) - custom public path for worker scripts, overrides the public path from which files generated by this plugin will be served. Or you can set CDN e.g https://unpkg.com/vite-plugin-monaco-editor@1.0.5/cdn

  • default value: monacoeditorwork

• globalAPI (boolean) - specifies whether the editor API should be exposed through a global monaco object or not. This option is applicable to 0.22.0 and newer version of monaco-editor. Since 0.22.0, the ESM version of the monaco editor does no longer define a global monaco object unless global.MonacoEnvironment = { globalAPI: true } is set (change log).

  • default value: false.

• customDistPath ((root: string, buildOutDir: string, base: string) => string) - Custom callback returns the worker path

• forceBuildCDN (boolean) - If you use CDN, the build is skipped by default. Set to true if you want to generate woker

  • default value: false

Some languages share the same web worker. If one of the following languages is included, you must also include the language responsible for instantiating their shared worker:

Language	Instantiator
javascript	typescript
handlebars	html
scss, less	css