SmartCodingTips

πŸ› οΈ Using React DevTools

React Developer Tools is a powerful browser extension that allows you to inspect the component hierarchy, props, state, and hooks in your React apps.


πŸ“¦ 1. Installation

πŸ” 2. Key Features

  • Component Tree: Visualize the component hierarchy
  • Props & State: View and edit live values
  • Hooks: See hook names and values (e.g., useState, useReducer)
  • Profiler: Measure render time and performance bottlenecks

🧭 3. How to Use

  • Open your app in the browser
  • Open Developer Tools (Right click β†’ Inspect or F12)
  • Switch to the βš›οΈ Components or Profiler tab
  • Click on a component to inspect its props, state, and hooks

πŸ“Š 4. Profiler Tab

The Profiler lets you:

  • Record rendering performance
  • Find unnecessary re-renders
  • Optimize slow components
πŸ’‘ You can rename hooks in DevTools by naming your custom hooks clearly (e.g., useAuth() instead of useSomething()).

βœ… Bonus Tips

  • Use the search bar to find components fast
  • Click the eye icon to highlight the DOM node in the page
  • Use the β€œRendered by” section to trace component hierarchy