[Bug] Can't automatic init webworker

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

Not applicable

Monaco Editor Playground Code

Not applicable

Reproduction Steps

1. init a vue project (using npm create vue)
2. intall monaco editor (using npm install monaco-editor@0.48.0)
3. define a new theme, like:

monaco.editor.defineTheme("logThemeDark", {
        base: "vs-dark",
        inherit: true,
        rules: [],
        colors: {
            "editor.background": "#282C34",
            "editor.lineHighlightBackground": "#2C313C",
        },
    });

4. init editor to a dom
5. run server and open website
6. check console in DevTools

Actual (Problematic) Behavior

warning in console:

• chunk-KNE2EGB2.js?v=0f63c2c9:39565 Could not create web worker(s). Falling back to loading web worker code in main thread, which might cause UI freezes. Please see https://github.com/microsoft/monaco-editor#faq
• chunk-KNE2EGB2.js?v=0f63c2c9:39567 You must define a function MonacoEnvironment.getWorkerUrl or MonacoEnvironment.getWorker

checked the faq, not opened with file:// (opened with http:// that served by vite)

(sorry for my poor english, i'm a chinese)

Expected Behavior

can create webworker successfully

Additional Context

platfrom:

• Window 11 24H2

browser:

• Chrome 124.0.6367.91 x64
• Edge 124.0.2478.67 x64 stable app beta channel

npm packages:

test-project@0.0.0 D:\projects\PCL-Community\PCL2-LogViewer-TE\test-monacoEdtior
├── @vitejs/plugin-vue@4.6.2
├── monaco-editor@0.48.0
├── vite@5.2.10
└── vue@3.4.26

Start with the Vue/Vite reproduction using monaco-editor 0.48.0 and review the Monaco Editor FAQ for web worker setup. Investigate why the browser falls back to the main thread despite being served over HTTP; done means the worker initializes successfully without the console warnings.