react runtime_error ai_generated true

TypeError: Cannot read properties of null (reading 'useCallback')

ID: react/cannot-read-properties-of-null-reading-usecallback

Also available as: JSON · Markdown · 中文
85%Fix Rate
85%Confidence
1Evidence
2024-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
React 18.2.0 active — — —
React 19.0.0 active — — —
Webpack 5.88.0 active — — —
Node 20.11.0 active — — —

Root Cause

React hooks (like useCallback) are called outside a valid React component or custom hook context, often due to broken module bundling or incorrect import of React.

generic

中文

React hooks（如 useCallback）在有效的 React 组件或自定义 Hook 上下文之外被调用，通常是由于模块打包错误或 React 导入不正确。

Official Documentation

https://react.dev/reference/react/useCallback

Workarounds

  1. 85% success Ensure React is imported correctly at the top of the file: `import React, { useCallback } from 'react';` and check that your bundler (e.g., webpack) resolves 'react' to a valid module. 
    Ensure React is imported correctly at the top of the file: `import React, { useCallback } from 'react';` and check that your bundler (e.g., webpack) resolves 'react' to a valid module.
  2. 80% success If using webpack, add an alias for 'react' in webpack.config.js: `resolve: { alias: { react: path.resolve('./node_modules/react') } }` to force correct resolution. 
    If using webpack, add an alias for 'react' in webpack.config.js: `resolve: { alias: { react: path.resolve('./node_modules/react') } }` to force correct resolution.
  3. 90% success Check for multiple React versions in node_modules (e.g., from hoisting issues). Run `npm ls react` or `yarn why react` and deduplicate using `npm dedupe` or resolutions in package.json. 
    Check for multiple React versions in node_modules (e.g., from hoisting issues). Run `npm ls react` or `yarn why react` and deduplicate using `npm dedupe` or resolutions in package.json.

中文步骤

  1. Ensure React is imported correctly at the top of the file: `import React, { useCallback } from 'react';` and check that your bundler (e.g., webpack) resolves 'react' to a valid module.
  2. If using webpack, add an alias for 'react' in webpack.config.js: `resolve: { alias: { react: path.resolve('./node_modules/react') } }` to force correct resolution.
  3. Check for multiple React versions in node_modules (e.g., from hoisting issues). Run `npm ls react` or `yarn why react` and deduplicate using `npm dedupe` or resolutions in package.json.

Dead Ends

Common approaches that don't work:

  1. 95% fail

    The error is about React object being null, not strict mode.

  2. 90% fail

    The issue is with module resolution, not JSX structure.

  3. 80% fail

    The error stems from bundler misconfiguration, not corrupted packages.