Nuxt•3mo ago

Tools to debug exact line that causes error?

"[nuxt] [useAsyncData] key must be a string.' I get this error 500, is there a tool or something that allows me to see the line of lines that ran before this error occured?

11 Replies

kapa.ai•3mo ago

Hi @WiFi Plug. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- To debug the exact line that causes an error like [nuxt] [useAsyncData] key must be a string, Nuxt provides several tools and techniques: 1. Sourcemaps: Sourcemaps are enabled by default for the server build and for the client build in dev mode. You can explicitly enable them in your nuxt.config for both server and client. This allows you to see the original source code and line numbers in stack traces, making it easier to pinpoint where errors occur.

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

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

Debugging in Nuxt 2. Node Inspector: You can start Nuxt in dev mode with the Node.js debugger active using:

   nuxt dev --inspect

   nuxt dev --inspect

This lets you attach Chrome DevTools or your IDE to step through code and set breakpoints. 3. IDE Debugging: Both VS Code and JetBrains IDEs support debugging Nuxt apps. You can configure your IDE to attach to both the client and server, allowing you to set breakpoints and inspect the call stack when errors occur. Example configurations are provided in the docs for VS Code and JetBrains IDEs. 4. Error Handling: For runtime errors, you can use Vue's onErrorCaptured or Nuxt's vue:error hook to log errors and their stack traces. This can help you see the sequence of function calls leading up to the error.

   export default defineNuxtPlugin((nuxtApp) => {
     nuxtApp.vueApp.config.errorHandler = (error, instance, info) => {
       // Log or report the error
       console.error(error, info)
     }
     nuxtApp.hook('vue:error', (error, instance, info) => {
       // Log or report the error
       console.error(error, info)
     })
   })

   export default defineNuxtPlugin((nuxtApp) => {
     nuxtApp.vueApp.config.errorHandler = (error, instance, info) => {
       // Log or report the error
       console.error(error, info)
     }
     nuxtApp.hook('vue:error', (error, instance, info) => {
       // Log or report the error
       console.error(error, info)
     })
   })

Error Handling in Nuxt Note: The error [nuxt] [useAsyncData] key must be a string suggests that the key you are passing to useAsyncData is not a string. You can use sourcemaps and the above debugging tools to trace where useAsyncData is called with an invalid key. Also, ensure you are using a string, Ref<string>, or ComputedRef<string> as the key, as shown in the Reactive Keys documentation. If you enable sourcemaps and use your IDE's debugger, you should be able to see the exact line and call stack that led to the error. This is the recommended approach for tracing such issues in Nuxt. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

WiFi PlugOP•3mo ago

@kapa.ai where are sourcemaps shown for an error that occurs client side? i dont see much detail in the browser console. could it be because i use a custom error.vue that its not displaying more detail

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- When a client-side error occurs in Nuxt, sourcemaps—if enabled—allow the browser's developer tools (like Chrome DevTools) to display the original source file and line number in the console or stack trace. By default, in development mode, client-side sourcemaps are enabled, but in production they are not unless you explicitly enable them in your nuxt.config:

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

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

Nuxt sourcemap config If you do not see detailed stack traces or original source lines in the browser console, it could be because: - Sourcemaps are not enabled for the client build in your configuration. - You are in production mode and the default is client: false. - Your browser is not loading the sourcemaps (check the Network tab for .map files). Using a custom error.vue does not affect whether sourcemaps are generated or whether the browser can display stack traces. The error.vue only controls how the error is presented to the user, not what appears in the browser console or DevTools. The stack trace and file/line information in the console are determined by the presence and configuration of sourcemaps, not by the error page template itself Debugging in Nuxt error.vue docs. Summary:
If you want to see more detailed stack traces with original source lines in the browser console for client-side errors, ensure that client sourcemaps are enabled in your Nuxt config. The use of a custom error.vue does not limit the detail shown in the browser console. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

WiFi PlugOP•3mo ago

@kapa.ai " <script setup lang="ts"> import { computed } from 'vue' import type { Role } from '#shared/types' const props = withDefaults( defineProps<{ role: Role | null | undefined size?: 'xs' | 'sm' | 'md' | 'lg' }>(), { size: 'md', } ) // Get the helper function from the composable const { getReactiveRoleDisplay } = useRoleDisplay() // Use the reactive version that properly tracks prop changes const roleDisplay = getReactiveRoleDisplay(() => props.role) const SIZES_CONFIG = { xs: 'size-3.5', sm: 'size-4', md: 'size-4', lg: 'size-5', } const iconSizeClass = computed(() => SIZES_CONFIG[props.size]) </script> <template> <UTooltip v-if="roleDisplay.iconName" :text="roleDisplay.label"> <UIcon :name="roleDisplay.iconName" :class="[iconSizeClass, roleDisplay.iconColorClass]" aria-hidden="true" /> </UTooltip> </template> " i have this component to display an icon with UIcon however when my roldedisplay icon name changes the icon only changes its color but not the icon image it's stuck as the first image i passed into it. why is this? should UIcon handle reactivity properly or not

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- Based on the available knowledge sources, the UIcon component from Nuxt UI is designed to display any icon from Iconify using the name prop, and it should update reactively when the name prop changes, as long as the value passed to name is reactive and changes as expected UIcon usage. If you observe that the icon image does not update when roleDisplay.iconName changes (but the color does), this is unexpected behavior according to the documentation. The UIcon component should handle reactivity properly for its name prop. Possible causes based on Nuxt/Vue reactivity: - If roleDisplay is not a fully reactive object or if iconName is not a tracked property (e.g., not a ref or computed), Vue may not detect changes. - If getReactiveRoleDisplay does not return a reactive object or if it returns a plain object, reactivity may be lost. What you can check: - Ensure that roleDisplay.iconName is a ref or a property of a reactive/computed object. - If roleDisplay is a plain object, try making it a computed property or a ref. Example of a reactive approach:

const roleDisplay = computed(() => getReactiveRoleDisplay(() => props.role))

const roleDisplay = computed(() => getReactiveRoleDisplay(() => props.role))

Or, if getReactiveRoleDisplay returns a plain object, destructure its properties as computed:

const iconName = computed(() => roleDisplay.value.iconName)

const iconName = computed(() => roleDisplay.value.iconName)

Then use :name="iconName" in your template. Summary:
According to the documentation, UIcon should update when its name prop changes reactively. If it does not, the issue is likely with how reactivity is set up in your composable or how roleDisplay.iconName is provided, not with the UIcon component itself UIcon API. If you need further debugging, please check the reactivity of roleDisplay.iconName in your setup. If you can provide the implementation of getReactiveRoleDisplay, more specific advice could be given. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

WiFi PlugOP•3mo ago

@kapa.ai " <SvgoLandingBgDots10 class="w-auto h-14" :fontControlled="false" />" using svgo my svg image is white instead of being the color it is actually how do i fix it

kapa.ai•3mo ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- I'm sorry, but the knowledge sources provided do not contain specific information about color issues with SVGs when using the nuxt-svgo module or how to resolve SVGs appearing white instead of their intended color. The only related information is that the nuxt-svgo module allows for automatic importing of SVGs as components, but it does not mention color handling or the fontControlled prop nuxt-svgo usage. If you need further help, you may want to check the SVG file itself for hardcoded color values (like fill="white"), or consult the documentation for the nuxt-svgo module or Iconify for more details on color control. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•3mo ago

<@679734274840330384> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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Tools to debug exact line that causes error?

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