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AI solution for React Coding Question on BFE.dev
8. useDebounce()

Here's a possible implementation of useDebounce() using useEffect():

import { useState, useEffect } from 'react';

function useDebounce<T>(value: T, delay: number): T {
  const [debouncedValue, setDebouncedValue] = useState<T>(value);

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

    // Cancel the timeout if value or delay changes
    return () => {
      clearTimeout(timeoutId);
    };
  }, [value, delay]);

  return debouncedValue;
}

function App() {
  const [value, setValue] = useState('');
  const debouncedValue = useDebounce(value, 1000);

  const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
    setValue(event.target.value);
  };

  return (
    <div>
      <input type="text" value={value} onChange={handleChange} />
      <p>Debounced value: {debouncedValue}</p>
    </div>
  );
}

In this implementation, useDebounce() takes two parameters: the value to debounce and the delay in milliseconds. It returns the debounced value that only updates after delay milliseconds have passed without a new value being set.

The implementation uses useEffect() to set a timeout that updates the debounced value after the specified delay. The timeout is canceled if the value or delay changes before it fires.

In the App component, we use the debounced value instead of the raw input value. The handleChange function updates the raw value, and the useDebounce hook takes care of debouncing it.