Debugging Nitro Runtime Errors

[unkempt jay]

Hi @frosty summit. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

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To debug Nitro runtime errors in a Nuxt application, especially when dealing with SSR-related issues, you can try the following approaches:

1. Use Node Inspector:
   Nuxt provides a way to debug server-side code using Node.js inspector. You can start your Nuxt app in debug mode by running:

   nuxi dev --inspect
   

   This will allow you to attach a debugger, such as Chrome DevTools, to your Nuxt application Debugging with Node Inspector (https://nuxt.com/docs/guide/going-further/debugging#debugging-with-node-inspector).

2. Enable Source Maps:
   Make sure source maps are enabled for both server and client builds. This will help in debugging by mapping the compiled code back to your original source code. You can enable source maps in your Nuxt configuration:

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

   Sourcemaps (https://nuxt.com/docs/guide/going-further/debugging#sourcemaps)

3. Use IDE Debugging:
   Set up debugging in your IDE. For example, if you're using VS Code, you can create a launch configuration to debug both client and server-side code Example VS Code Debug Configuration (https://nuxt.com/docs/guide/going-further/debugging#debugging-in-your-ide).

4. Implement Error Hooks:
   Use Nuxt's error hooks to capture and log errors more effectively. You can set up hooks in a plugin:

   export default defineNuxtPlugin((nuxtApp) => {
     nuxtApp.vueApp.config.errorHandler = (error, instance, info) => {
       // handle error, e.g. report to a service
     }
   
     nuxtApp.hook('vue:error', (error, instance, info) => {
       // handle error, e.g. report to a service
     })
   })
   

   Vue Errors (https://nuxt.com/docs/getting-started/error-handling#vue-errors)

5. Use Nitro Hooks:
   Implement Nitro hooks to capture server-side errors:

   export default defineNitroPlugin((nitroApp) => {
     nitroApp.hooks.hook("error", async (error, { event }) => {
       console.error(`${event.path} Application error:`, error)
     });
   })
   

   Nitro App Hooks (https://nuxt.com/docs/api/advanced/hooks#nitro-app-hooks-runtime-server-side)

6. Custom Error Page:
   Create a custom error page (error.vue) in your project root to handle and display errors more informatively Error Page (https://nuxt.com/docs/getting-started/error-handling#error-page).

7. Docker Considerations:
   Since you're running in a Docker environment, ensure that your Docker setup allows for proper debugging. You might need to expose additional ports or configure your environment to allow for attaching a debugger.

Remember, when debugging SSR issues, the problem could be in server-side code that's not executed in client-side rendering. Focus on server-side hooks and lifecycle events to identify where the error might be occurring.

If you're still unable to identify the issue, you might need to gradually disable parts of your application (like plugins or modules) to isolate the problem.

Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: