[Bug] monaco-editor-webpack-plugin Uncaught Error: Unexpected usage

[sunny-fun]

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

"monaco-editor": "^0.30.1",
"monaco-editor-webpack-plugin": "^6.0.0",

Monaco Editor Playground Code

import * as monaco from "monaco-editor";
export default monaco

Reproduction Steps

I found an issue when using monaco-editor in Vue. When using the following code:

const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
new MonacoWebpackPlugin({
    languages: ['json', 'javascript'],
})

If the type declaration is not set when configuring the languages of MonacoWebpackPlugin in the plugins, an error will be reported:

Uncaught Error: Unexpected usage
Error: Unexpected usage
 at EditorSimpleWorker.loadForeignModule (editorSimpleWorker.js?f92e:450:1)
 at eval (webWorker.js?1ca9:38:1)
 at eval (error.js?d435:8:1)

However, if the type declaration is set, as shown in the following code, the error will not be reported:

new MonacoWebpackPlugin({
    languages: ['json', 'javascript', 'typescript'],
})

What is going on here?

Actual (Problematic) Behavior

I found an issue when using monaco-editor in Vue. When using the following code:

const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
new MonacoWebpackPlugin({
    languages: ['json', 'javascript'],
})

If the type declaration is not set when configuring the languages of MonacoWebpackPlugin in the plugins, an error will be reported:

Uncaught Error: Unexpected usage
Error: Unexpected usage
 at EditorSimpleWorker.loadForeignModule (editorSimpleWorker.js?f92e:450:1)
 at eval (webWorker.js?1ca9:38:1)
 at eval (error.js?d435:8:1)

However, if the type declaration is set, as shown in the following code, the error will not be reported:

new MonacoWebpackPlugin({
    languages: ['json', 'javascript', 'typescript'],
})

What is going on here?

Expected Behavior

No response

Additional Context

No response

[RyanHo97]

I also encountered a similar problem. Although it was changed to languages: ['JSON ',' JavaScript ',' typescript '] so that no errors were reported, the highlighted code became invalid. How can I solve this problem：