React Js Get Date One Month AGO

<!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 {useEffect,useState} = React;
    function App() {
      const [oneMonthAgo, setOneMonthAgo] = useState('');

useEffect(() => {
        const currentDate = new Date();
        currentDate.setMonth(currentDate.getMonth() - 1);
        const formattedDate = currentDate.toISOString()
        setOneMonthAgo(formattedDate);
      }, []);

return (
        <div className='container'>
          <h1>React Js Date One Month Ago</h1>
          <p>Date One Month Ago : {oneMonthAgo}</p>
        </div>
      );
    }
    ReactDOM.render(<App />, document.getElementById('app'));
  </script>
  <style>
    .container {
      margin: 20px;
      padding: 20px;
      border-radius: 5px;
      box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
      font-family: Arial, sans-serif;
    }
  </style>
</body>

</html>