The process of finding and fixing errors (bugs) in your code.
Debugging is the process of finding and fixing errors (bugs) in your code. It is one of the most important skills a developer can have — you will spend more time debugging than writing new code.
Effective debugging is methodical: read the error message, reproduce the bug, isolate the cause, fix it, and verify. Your core tools are DevTools (press F12), the browser console (shows JavaScript errors and log output), the Network Tab (shows requests, status codes, and JSON responses), and stack traces (showing exactly which Function crashed and where). CI/CD pipelines catch bugs automatically before Deployment.
When debugging React Router apps with Supabase, common issues include: loader returning empty data (suspect RLS), action failing silently (check the Network Tab for status codes), CORS errors on Edge Functions (check server logs), and Environment Variables not loading (restart the dev server). Error Handling with Try/Catch and error boundaries prevents crashes while you debug.
The best developers are not those who write perfect code — they are those who debug efficiently. AI Assisted Development with Claude Code helps debug by explaining errors and suggesting fixes.
The most common error is "Cannot read property of undefined". In Production, debugging relies on logs and Supabase Dashboard rather than Client-Side console.logs. Always determine if the bug is Client-Side or server-side first.
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