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react-tooling

Configure debugging, bundle analysis, and ecosystem tools for React applications. Use when setting up Vite/webpack build tooling, analyzing bundle size, debugging re-renders with React DevTools, or configuring ESLint and StrictMode for React projects.

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  • SKILL.md1.7 KB
  • evals/evals.json2.3 KB
  • references/example.md751 B

SKILL.md (original)

Review the instructions the agent will receive before you install.

React Tooling

Priority: P2 (MEDIUM)

Debugging Workflow

  1. Enable StrictMode to catch side-effect bugs during development.
  2. Profile with React DevTools Flamegraph to identify expensive components.
  3. Trace re-renders using "Highlight Updates" or why-did-you-render.
  4. Analyze bundle with source-map-explorer or rollup-plugin-visualizer before shipping.

Setup

See implementation examples for StrictMode, why-did-you-render, and custom hook debug label setup.

Implementation Guidelines

  • Analysis: Use source-map-explorer or webpack-bundle-analyzer / rollup-plugin-visualizer (Vite).
  • Linting: Mandate eslint-plugin-react-hooks (exhaustive-deps) and Prettier.
  • Environment: Use Vite over CRA. Manage environment variables with .env.
  • Build: Configure Terser for production minification. Use vite-plugin-pwa for service workers.

Anti-Patterns

  • No production profiling: Remove why-did-you-render and debug tools before production builds.
  • No skipping StrictMode: Keep <React.StrictMode> in dev to surface side effects early.
  • No CRA for new projects: Use Vite for faster builds and better DX.

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