React Js Count the occurrences of each word in a string

<!DOCTYPE html>
<html>

const { useState } = React;
    function App() {
      const [inputText, setInputText] = useState('The brown dog jumped over the lazy dog when the brown fox was sleeping');
      const [wordCounts, setWordCounts] = useState({});

const countWords = () => {
        const words = inputText.toLowerCase().split(/\s+/);
        const counts = {};

for (const word of words) {
          counts[word] = (counts[word] || 0) + 1;
        }

setWordCounts(counts);
      };

return (
        <div className='container'>
          <h2 className='title'>React Js Count the occurrences of each word in a string</h2>
          <textarea
            className='input-text'
            placeholder="Enter text..."
            value={inputText}
            onChange={(e) => setInputText(e.target.value)}
          />
          <button className='count-button' onClick={countWords}>Count Words</button>
          <div className='word-counts'>
            <h3 className='word-counts-title'>Word Counts:</h3>
            <ul className='word-list'>
              {Object.entries(wordCounts).map(([word, count]) => (
                <li key={word} className='word-item'>
                  {word}: {count}
                </li>
              ))}
            </ul>
          </div>
        </div>

);
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>

.container {
      margin: 0 auto;
      width: 600px;
      text-align: center;
      box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
      padding: 20px;
    }

.title {
      font-size: 24px;
      text-align: center;
      margin-bottom: 20px;
      color: #333;
    }

.input-text {
      width: 100%;
      padding: 10px;
      border: 1px solid #ccc;
      border-radius: 5px;
      font-size: 16px;
      box-sizing: border-box;
    }

.count-button {
      display: block;
      width: 100%;
      padding: 10px;
      background-color: #007bff;
      color: #fff;
      border: none;
      border-radius: 5px;
      font-size: 18px;
      cursor: pointer;
      margin-top: 10px;
    }

.count-button:hover {
      background-color: #0056b3;
    }

.word-counts {
      margin-top: 20px;
    }

.word-counts-title {
      font-size: 18px;
      color: #333;
    }

.word-list {
      list-style-type: none;
      padding: 0;
    }

.word-item {
      font-size: 16px;
      margin-bottom: 5px;
      color: #555;
    }
  </style>
</body>

</html>