index.js
index.html
 
import React from 'react';
import ReactDOM from 'react-dom';
class MyForm extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      description: 'The content of a textarea goes in the value attribute'
    };
  }
  render() {
    return (
      <form>
      <textarea value={this.state.description} />
      </form>
    );
  }
}
ReactDOM.render(<MyForm />, document.getElementById('root'));
 
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport"
      content="width=device-width, initial-scale=1" />
    <title>React App</title>
  </head>
  <body>
    <div id="root"></div>
  </body>
</html>