React Js Increase input width Dynamically

<!DOCTYPE html>
<html>

const { useState, useEffect } = React;
    function App() {
      const [inputValue, setInputValue] = useState('');

const adjustWidth = (event) => {
        const value = event.target.value;

if (value.length === 0) {
          event.target.style.width = 'initial';
        } else if (value.length > 20 && value.length < MaxInputLength) {
          event.target.style.width = `${value.length * 6 + 30}px`; // 5 * 6 + 30 for extra space
        }

setInputValue(value);
      };

return (
        <div className='container'>
          <h2 className='header'>React Js Increase input width dynamically:</h2>
          <input
            type="text"
            className='input'
            placeholder="Type something.."
            value={inputValue}
            onChange={adjustWidth}
          />
        </div>

);
      ;

}

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

.container {
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      text-align: center;
      max-width: 600px;
      margin: 0 auto;
    }

.input {
      border: 2px solid #ccc;
      border-radius: 5px;
      padding: 10px;
      font-size: 16px;
      transition: width 0.3s ease;
      /* Smooth width transition */
      width: 200px;
      max-width: 100%;
      /* Prevent input from overflowing the container */
    }
  </style>
</body>

</html>

 
<!DOCTYPE html>
<html>
​
<head>
  <meta charset="UTF-8" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
</head>
​
<body>
  <div id="app"></div>
​
  <script type="text/babel">
    const MaxInputLength = 100;
​
    const { useState, useEffect } = React;
    function App() {
      const [inputValue, setInputValue] = useState('');
​
      const adjustWidth = (event) => {
        const value = event.target.value;
​
        if (value.length === 0) {
          event.target.style.width = 'initial';
        } else if (value.length > 20 && value.length < MaxInputLength) {
          event.target.style.width = `${value.length * 6 + 30}px`; // 5 * 6 + 30 for extra space
        }
​
        setInputValue(value);
      };
​
      return (
        <div className='container'>
          <h2 className='header'>React Js Increase input width dynamically:</h2>
          <input
            type="text"
            className='input'
            placeholder="Type something.."
            value={inputValue}
            onChange={adjustWidth}
          />
        </div>
​
      );
      ;
​
​
    }
​
    ReactDOM.render(<App />, document.getElementById("app"));
  </script>
​
​
  <style>
    * {
      box-sizing: border-box;
    }
​
    .container {
      padding: 20px;
      border-radius: 8px;
      box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
      text-align: center;
      max-width: 600px;
      margin: 0 auto;
    }
​
    .input {
      border: 2px solid #ccc;
      border-radius: 5px;
      padding: 10px;
      font-size: 16px;
      transition: width 0.3s ease;
      /* Smooth width transition */
      width: 200px;
      max-width: 100%;
      /* Prevent input from overflowing the container */
    }
  </style>
</body>
​
</html>