Proper error handling in Next.js 15 is spread across four different mechanisms that serve different...
Proper error handling in Next.js 15 is spread across four different mechanisms that serve different purposes. Most guides cover one of them. This covers all four — and how they work together in a production app.
The Four Layers of Error Handling
error.tsx — Client component that catches rendering errors in a route segment
global-error.tsx — Catches errors in the root layout itself
Server action errors — Errors that happen during mutations and form submissions
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