P0.5: DevTools & Debugging
Chrome DevTools is the developer console built directly into the Google Chrome browser. It is your primary debugging dashboard.
1. Inspecting Elements
Right-click any element on a webpage and click Inspect. This opens the Elements panel showing the live HTML DOM and computed CSS styles. You can change colors, margins, and texts in real time to experiment.
Dan AbramovView Profile 🔗
Real-World Developer Case Study RoleReact Core Developer
Salary₹70 Lakhs/yr equivalent
CompanyMeta / React Core Team
Core Tech Stack
ReactReduxJavaScriptDevTools ElementsConsoleNetwork
“I spent years using console.log for everything. Once I learned to inspect variables and use Chrome DevTools elements/network panel, my debugging became ten times faster.”
2. DevTools Panels Checklist
Familiarize yourself with these panels:
- Elements: Inspect and modify HTML tags and CSS styles live.
- Console: Read JavaScript outputs, log messages, and warning exceptions.
- Network: Monitor HTTP requests, load times, and API payload responses.
- Application: Inspect cookies, LocalStorage variables, and PWA cached assets.