React Developer Tools
React Developer Tools is a browser extension and standalone debugging tool for inspecting React component trees, props, state, context, hooks, and rendering performance.
React in Depth
React Developer Tools is a browser extension and standalone debugging application for inspecting React component trees and application behavior.
- How it is used
- Diagnoses running React UI, state, and rendering problems that source-only linting and formatting cannot reveal.
- How deep it goes
- Works through inspector setup and component inspection, but leaves the more specialized Profiler at an overview.
- Examples
- Uses a dark-mode application to inspect a component tree, edit props and hook state, and view context values.
- What you can do after
- Diagnose/debug with React Developer Tools by locating components, testing props and hook state, and investigating unexpected renders.
React Quickly, Second Edition
React Developer Tools is a browser developer extension for inspecting React component trees, props, state, and rendering behavior.
- How it is used
- Diagnoses whether React components re-render after interactive state updates.
- How deep it goes
- Shows render highlighting and explains unchanged state references, but does not detail broader profiling workflows.
- Examples
- Uses a resettable counter and broken versus corrected to-do lists to expose rendering behavior.
- What you can do after
- Diagnose/debug with it: identify whether state changes trigger component renders.
Read how React Quickly, Second Edition explains React Developer Tools →
Related concepts
- debuggingused by · Debugging is the systematic process of investigating software behavior to locate, diagnose, and correct defects or their causes.
- components inspectoruses · The React Developer Tools components inspector is an inspection interface for examining React components, their properties, state, and hierarchy.
- pluginkind of · A plugin is an optional software component that extends or modifies a host application’s capabilities through an extension or integration mechanism.
- profilerhas part · A profiler is software that measures and analyzes program execution behavior and resource consumption to characterize performance and identify bottlenecks.
- npmuses · npm is a package-management system for JavaScript, comprising a command-line client and an online registry for discovering, installing, and publishing packages.
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