Support node_modules when resolving worker urls

[remcohaszing]

Clear and concise description of the problem

When resolving a worker URL, it’s resolved relative to the current location. If a worker is loaded from node_modules, the full relative path needs to be specified. This may cause various issues:

• Resolving up to the project root and then into node_modules looks messy.
• In a mono repo, there may be multiple node_modules folders. Seemingly unrelated dependency changes may change the location of the worker code to resolve.
• If the worker is instantiated from a dependency, it needs to know where its dependencies are installed.

Suggested solution

Instead of the following:

new Worker(new URL('../../../../../node_modules/monaco-editor/esm/vs/editor/editor.worker', import.meta.url));

Let users write the following code:

new Worker(new URL('monaco-editor/esm/vs/editor/editor.worker', import.meta.url));

It would be nice this behaviour is kept, but as a fallback, the dependency is resolved from node_modules.

Alternative

No response

Additional context

Webpack also tries to resolve this from both a local file path and node_modules. Migrating to Vite is how I ran into this issue.

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.