如何使用angular select覆盖现有作用域

<select [(ngModel)]="selectedOption">
  <option value="option1">Option 1</option>
  <option value="option2">Option 2</option>
  <option value="option3">Option 3</option>
</select>

export class MyComponent {
  selectedOption: string;

  constructor() {
    this.selectedOption = 'option1'; // 初始化选项
  }
}

export class MyComponent {
  selectedOption: string;

  constructor() {
    this.selectedOption = 'option1'; // 初始化选项
  }

  onOptionChange() {
    // 当选项改变时执行的操作
    console.log(this.selectedOption);
  }
}