Browser DevTools Guide

Master the built-in tools for debugging and optimization.

Elements Panel

Inspect and modify HTML and CSS in real-time. Use it to debug layout issues, test style changes, and understand the DOM structure.

Console

View log messages, errors, and warnings. Execute JavaScript commands and interact with the page programmatically.

Network Panel

Monitor all network requests, analyze load times, identify bottlenecks, and debug API calls.

Sources Panel

Set breakpoints, step through code, and debug JavaScript. View and edit source files directly in the browser.

Performance Panel

Record and analyze runtime performance, identify jank, and optimize rendering.