如何在React中使用DOM元素

import React from 'react';
import ReactDOM from 'react-dom';

class MyComponent extends React.Component {
  render() {
    return (
      <div>
        <h1>Hello, World!</h1>
        <p>This is a paragraph.</p>
      </div>
    );
  }
}

ReactDOM.render(<MyComponent />, document.getElementById('root'));

import React from 'react';
import ReactDOM from 'react-dom';

class MyComponent extends React.Component {
  render() {
    return React.createElement('div', null,
      React.createElement('h1', null, 'Hello, World!'),
      React.createElement('p', null, 'This is a paragraph.')
    );
  }
}

ReactDOM.render(React.createElement(MyComponent, null), document.getElementById('root'));