JAVASCRIPT

React `useDebounce` Hook for Input Throttling

Implement a custom React `useDebounce` hook to delay execution of a function until a certain time has passed without further calls, optimizing performance for search inputs and API requests.

import { useState, useEffect } from 'react';

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

  useEffect(() => {
    const handler = setTimeout(() => {
      setDebouncedValue(value);
    }, delay);

    return () => {
      clearTimeout(handler);
    };
  }, [value, delay]);

  return debouncedValue;
}

// Example Usage:
// function SearchComponent() {
//   const [searchTerm, setSearchTerm] = useState('');
//   const debouncedSearchTerm = useDebounce(searchTerm, 500); // 500ms delay

//   useEffect(() => {
//     if (debouncedSearchTerm) {
//       console.log('Fetching data for:', debouncedSearchTerm);
//       // Perform API call or heavy computation here
//     }
//   }, [debouncedSearchTerm]);

//   return (
//     <input
//       type="text"
//       placeholder="Search..."
//       value={searchTerm}
//       onChange={(e) => setSearchTerm(e.target.value)}
//     />
//   );
// }

How it works: This `useDebounce` hook delays updating a value until a specified `delay` has passed since the last change. It's perfect for optimizing performance by preventing frequent re-renders or API calls when a user is typing rapidly into an input field, ensuring the function is only executed once the user has paused.

React `useDebounce` Hook for Input Throttling

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