nextjs build_error ai_generated partial

ChunkLoadError: Loading chunk X failed

ID: nextjs/loading-chunk-failed

Also available as: JSON · Markdown
82%Fix Rate
85%Confidence
50Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
14 active — — —

Root Cause

Webpack chunk (code split piece) not found. Deploy replaced files while users had old HTML.

generic

Workarounds

  1. 90% success Add error boundary that triggers window.location.reload() on ChunkLoadError 
    class ErrorBoundary extends React.Component { componentDidCatch(e) { if (e.name === 'ChunkLoadError') window.location.reload(); } }

    Sources: https://react.dev/reference/react/Component#catching-rendering-errors-with-an-error-boundary

  2. 85% success Use content-addressed filenames (default in Next.js) so old chunks remain available 
    default in Next.js

    Sources: https://nextjs.org/docs/app/building-your-application/deploying

  3. 82% success Keep old build assets for a grace period during deployments 
    // In your deployment config, keep old _next/static assets:
# nginx.conf:
location /_next/static {
  alias /var/www/builds/current/_next/static;
  # Also serve previous build's assets:
  try_files $uri @previous_build;
}

# Or use a CDN with long cache TTLs for immutable assets

    Sources: https://nextjs.org/docs/app/building-your-application/deploying

Dead Ends

Common approaches that don't work:

  1. Disable code splitting 80% fail

    Destroys performance — one huge bundle

  2. Force reload on every navigation 75% fail

    Terrible UX — kills SPA behavior

Error Chain

Frequently confused with: