如何在React.js的下拉列表中选择"Other“选项时在表单中添加输入字段

constructor(props) {
  super(props);
  this.state = {
    selectedOption: '',
    showInputField: false
  };
}

handleSelectChange(event) {
  const selectedOption = event.target.value;
  if (selectedOption === 'Other') {
    this.setState({ selectedOption, showInputField: true });
  } else {
    this.setState({ selectedOption, showInputField: false });
  }
}

render() {
  return (
    <form>
      <select value={this.state.selectedOption} onChange={this.handleSelectChange}>
        <option value="Option1">Option 1</option>
        <option value="Option2">Option 2</option>
        <option value="Other">Other</option>
      </select>
      {this.state.showInputField && (
        <input type="text" placeholder="Please specify" />
      )}
      <button type="submit">Submit</button>
    </form>
  );
}