Nuxt•2mo ago

Cannot find module './lib/source-map-generator'

Hi, I have recently done some migrations to our codebase, and after that, the dev server stopped working (building and previewing works). The error I get is:

[nuxt] [request error] [unhandled] [500] Cannot find module './lib/source-map-generator'
Require stack:
- <project_root>/source-map-js

[nuxt] [request error] [unhandled] [500] Cannot find module './lib/source-map-generator'
Require stack:
- <project_root>/source-map-js

How can I debug an error like this?

3 Replies

kapa.ai•2mo ago

Hi @alexeliot. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To debug this error in Nuxt, you can follow these steps: 1. Check your dependencies: This error suggests there might be an issue with the source-map-js package. Make sure it's properly installed and up to date in your project. 2. Clear cache and reinstall dependencies: Sometimes, clearing the cache and reinstalling dependencies can resolve module-related issues. Try running:

   npm cache clean --force
   rm -rf node_modules
   npm install

   npm cache clean --force
   rm -rf node_modules
   npm install

(Replace npm with your package manager of choice) 3. Use sourcemaps: Enable sourcemaps in your Nuxt configuration to get more detailed error information. According to the Nuxt documentation on debugging (https://nuxt.com/docs/guide/going-further/debugging#sourcemaps), you can add this to your nuxt.config.js:

   export default defineNuxtConfig({
     sourcemap: {
       server: true,
       client: true
     }
   })

   export default defineNuxtConfig({
     sourcemap: {
       server: true,
       client: true
     }
   })

4. Check for conflicting versions: Ensure there are no conflicting versions of packages that might be causing this issue. You can use npm ls source-map-js to check for multiple versions. 5. Investigate the error stack: The error message provides a require stack. Check the files mentioned in this stack for any issues related to importing or using the source-map-js module. 6. Use Node Inspector: If the issue persists, you can use Node Inspector for more detailed debugging. As mentioned in the Nuxt debugging documentation (https://nuxt.com/docs/guide/going-further/debugging#debugging-with-node-inspector), run:

   nuxi dev --inspect

   nuxi dev --inspect

This will start Nuxt in dev mode with the debugger active, allowing you to attach to it from Chrome DevTools. If you're still unable to resolve the issue after these steps, you might want to consider reporting a bug (https://nuxt.com/docs/community/reporting-bugs) to the Nuxt community, making sure to include a minimal reproduction of the problem. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

<@242634160026550274> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

alexeliotOP•2mo ago

I've resolved the issue. If anyone stumbles on this as well, it was because I was using @headlessui/vue in an outdated way. I had @headlessui/vue listed under modules in my nuxt.config.ts. Apparently there's a nuxt module for it now. I replaced it with that, updated my tsconfig according to the new docs and the problem was fixed. I spotted what caused this error by adding a debugger breakpoint on a nitro hook:

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('error', (error) => {
    console.log(error) // Add breakpoint here. You should be able to see the module causing the problem while inspecting error.cause, in case it does not print on the error page
  }
})

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('error', (error) => {
    console.log(error) // Add breakpoint here. You should be able to see the module causing the problem while inspecting error.cause, in case it does not print on the error page
  }
})

Make sure to run nuxt dev --inspect for the debugger to attach.

Gaming

Programming

Cannot find module './lib/source-map-generator'

Did you find this page helpful?