Next.js Debugging Hub
Diagnosing and troubleshooting Next.js issues in production could mean sifting through logs to understand what happened or using an application monitoring tool like Sentry. Below are practical step-by-step guides, code snippets, and expert-vetted best practices for debugging Next.js issues.
All Next.js Answers
- >Error: Importing a component that needs useState. It only works in a Client Component, but none of its parents are marked with use client, so they're Server Components by default.
- >WebSocket connection to 'ws:app_url/_next/webpack-hmr' failed: WebSocket is closed before the connection is established
- >Next.js ERR_REQUIRE_ESM
- >Uncaught Error: invariant expected app router to be mounted
- >Window is not Defined
- >Next.js middleware Module not found: Can't resolve 'fs'
- >Get URL Params Next.js 13
- >Using dangerouslySetInnerHTML in Next.js
- >Component cannot be used as a JSX component. Its return type 'Element[]' is not a valid JSX element
- >Fixing handleHardNavigation errors in Next.js
More Next.js content
- Sentry BlogCommon Errors in Next.js and How to Resolve Them (opens in a new tab)
- Community SeriesDebug Next.js with Sentry (opens in a new tab)
- ResourcesJavaScript Frontend Error Monitoring 101 (opens in a new tab)
- Syntax.fmListen to the Syntax Podcast (opens in a new tab)
- Listen to the Syntax Podcast (opens in a new tab)
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