ChunkLoadError: Loading chunk 5 failed

The browser couldn’t download a code-split chunk. Usually a deployment or caching issue.

Fix 1: Hard refresh

Ctrl + Shift + R (Windows/Linux)
Cmd + Shift + R (Mac)

Fix 2: Clear old chunks on deploy

Make sure your deployment doesn’t delete old chunks before users have reloaded:

// Catch the error and reload
window.addEventListener('error', (e) => {
  if (e.message.includes('Loading chunk')) {
    window.location.reload();
  }
});

Fix 3: Check your CDN/hosting

Make sure all chunk files are being served. Check the network tab for 404s.

Fix 4: Use content hashes

// webpack.config.js
output: {
  filename: '[name].[contenthash].js',
  chunkFilename: '[name].[contenthash].js',
}

Related resources

• JavaScript array methods cheat sheet
• JavaScript complete guide