如何在react中默认选中选项

constructor(props) {
  super(props);
  this.state = {
    selectedOption: 'option1' // 默认选中的选项
  };
}

render() {
  return (
    <div>
      <input
        type="radio"
        value="option1"
        checked={this.state.selectedOption === 'option1'}
        onChange={this.handleOptionChange}
      />
      Option 1

      <input
        type="radio"
        value="option2"
        checked={this.state.selectedOption === 'option2'}
        onChange={this.handleOptionChange}
      />
      Option 2
    </div>
  );
}

handleOptionChange = (event) => {
  this.setState({
    selectedOption: event.target.value
  });
}