How to fix useDeferredValue is only available in React 18+ in React

Monorepo considerations: In monorepos using Yarn workspaces, npm workspaces, or Lerna, ensure all packages use the same React version. Use the "resolutions" field in package.json (Yarn) or "overrides" (npm 8.3+) to force a single React version:

{
  "resolutions": {
    "react": "^18.2.0",
    "react-dom": "^18.2.0"
  }
}

Alternative to useDeferredValue in React 17: If you cannot upgrade to React 18 immediately, you can achieve similar behavior using debouncing with useState and useEffect:

import { useState, useEffect } from 'react';

function useDebouncedValue(value, delay = 300) {
  const [debouncedValue, setDebouncedValue] = useState(value);

  useEffect(() => {
    const timer = setTimeout(() => setDebouncedValue(value), delay);
    return () => clearTimeout(timer);
  }, [value, delay]);

  return debouncedValue;
}

This provides similar deferred rendering but without the automatic optimization that useDeferredValue provides through React's concurrent rendering engine.

Testing library compatibility: If you use @testing-library/react, upgrade it to version 13+ which supports React 18. Earlier versions may have compatibility issues with the new concurrent features.

Breaking changes in React 18: While most React 17 code works in React 18, be aware of automatic batching changes. React 18 batches state updates in more situations (including setTimeout, promises, and native event handlers), which generally improves performance but may affect some edge cases in your application logic.