Nugsoft Developer Guides

Error Handling in Vue 3

Robust error handling improves user experience and app reliability. Vue 3 provides several mechanisms for managing errors in components and composables.

Error Boundaries

  • Use the errorCaptured lifecycle hook to catch errors in child components.
  • Display fallback UI or error messages when errors occur.
<script setup>
import { onErrorCaptured } from 'vue'
onErrorCaptured((err, instance, info) => {
  // Log error, show fallback UI, etc.
  return false // prevents further propagation
})
</script>

Global Error Handling

  • Use app.config.errorHandler to catch uncaught errors globally.
const app = createApp(App)
app.config.errorHandler = (err, instance, info) => {
  // Log error to monitoring service
  // Show notification to user
}

Async Error Management

  • Always handle errors in async functions and API calls.
  • Use try/catch blocks in composables and components.
try {
  await fetchData()
} catch (error) {
  // Handle error, show message
}

User Feedback

  • Show clear, actionable error messages to users.
  • Avoid exposing sensitive error details.
  • Use toast notifications or modals for error alerts.

Logging

  • Log errors to external services (e.g., Sentry, LogRocket) for monitoring and debugging.
  • Include error context (component, props, user actions).

References

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