Debugging in the Browser
Browser DevTools without the overwhelm: the Console, breakpoints in the Sources panel, and the Network tab solve most frontend mysteries.
- The DevTools Map and the Console DevTools is a live window into the running page, not a separate program. Learn the panel map and the one you'll live in: the Console — errors, logging, and live evaluation.
- Breakpoints and the Network Tab Pause your JavaScript with breakpoints in the Sources panel instead of scattering logs, then use the Network tab to find the request that failed and read what came back.
- A Real Investigation Walk one why-is-this-broken bug end to end across Console, Network, Sources, and Elements — plus the gotchas (caching, scope, source maps) that send people chasing ghosts.