facebook/react-devtoolsArchived
React Devtools
React DevTools is a set of web browser developer tools integrated into Chrome and Firefox. It functions as a component inspector and UI debugger designed to visualize the component hierarchy and analyze the runtime behavior of React applications.
The project includes a performance profiler used to detect unnecessary component re-renders and improve rendering efficiency. It also provides utilities for mapping virtual component trees to the physical DOM and linking rendered UI elements directly to their corresponding source code files and line numbers.
The toolset covers component hierarchy visualization, state and props inspection, and state management analysis. It provides capabilities for searching the application hierarchy and tracking how data flows through components.
Features
- Component Inspectors - Visualizes the component tree and enables examination of props, state, and context for React applications.
- React Components - Acts as a browser extension for visualizing and debugging the component hierarchy, props, and state of React apps.
- Component Inspection Tools - Enables examination of current props, state, and context for each element within the component tree.
- React Render Debugging - Provides tools for locating source code and mapping virtual components to their rendered DOM elements.
- Source Map Generators - Translates compiled component locations back to original source files and line numbers for direct code navigation.
- Execution-to-Source Mappers - Allows developers to jump directly from a rendered UI element to the specific source file and line number.
- React Performance Debuggers - Detects avoidable render cycles and their causes to optimize rendering efficiency.
- UI Component Model Trees - Maps virtual component trees to the physical DOM and identifies the corresponding source code.
- Component Hierarchy Mirroring - Maintains a mirrored copy of the React component hierarchy within the extension for fast navigation and searching.
- Virtual-to-DOM Mappings - Links virtual components to their corresponding physical elements to allow jumping between the tree and rendered output.
- Render Tracking Utilities - Highlights UI components as they re-render to identify and eliminate unnecessary updates.
- Fiber-to-DOM Mappings - Links physical browser elements to their corresponding React fiber nodes to enable navigation between UI and code.
- React Performance Optimization - Identifies unnecessary component re-renders to improve the speed and efficiency of the user interface.
- Debug State Injection - Injects monitoring logic into React internals to intercept updates and expose internal metadata for debugging.
- Browser Developer Tools - Integrates debugging panels into Chrome and Firefox for real-time application runtime analysis.
- Component Metadata Search - Allows users to locate specific components within the application hierarchy by searching for their names.
- React Hook Analysis - Provides diagnostic tools for monitoring hook return values and tracking data flow through components.
- Development Workflow - Browser extension for inspecting React component trees.
