React Js convert string to Key-Value Object

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="https://unpkg.com/react@17.0.2/umd/react.production.min.js"></script>
  <script src="https://unpkg.com/react-dom@17.0.2/umd/react-dom.production.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
  <title>Date Difference Calculator</title>
</head>

<body>
  <div id="app"></div>
  <script type="text/babel">
    const { useState, useEffect } = React;
    function App() {
      const [inputString, setInputString] = useState("key1:value1,key2:value2,key3:value3");
   const keyValuePairs = inputString.split(",").map(pair => pair.split(":"));
      const keyValueObject = Object.fromEntries(keyValuePairs);
      return (
        <div className='container'>
          <h2 className='title'>React Js Convert String into Key-Value Object:</h2>
          <p className='text'>String: {inputString}</p>
          <pre className='code'>{JSON.stringify(keyValueObject, null, 2)}</pre>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
  <style>
    .container {
      max-width: 600px;
      margin: 0 auto;
      padding: 20px;
      background-color: #f5f5f5;
      border-radius: 10px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    }

/* Title styles */
    .title {
      font-size: 24px;
      color: #333;
      margin-bottom: 10px;
    }

/* Text styles */
    .text {
      font-size: 18px;
      color: #555;
    }

/* Code block styles */
    .code {
      font-family: 'Courier New', monospace;
      font-size: 16px;
      background-color: #f9f9f9;
      padding: 10px;
      border: 1px solid #ddd;
      border-radius: 5px;
      overflow-x: auto;
      white-space: pre-wrap;
    }
  </style>
</body>

</html>