Angular 2选择了条件选项

Question

我有一个选择:

  <select id="position">
    <option *ngFor='#contactType of contactTypes' [attr.value]='contactType.contactTypeId'>
      {{contactType.description}}
    </option>
  </select>

我想条件选择一个选项:' contactType.contactTypeId == number '而不使用ngModel

Answer 1

我想这就是你想要的:

 <select id="position">
    <option *ngFor='#contactType of contactTypes'
      [attr.value]='contactType.contactTypeId' 
      [attr.selected]="contactType.contactTypeId == number ? true : null">
      {{contactType.description}}
    </option>
  </select>

要selected删除属性,您需要返回null(false结果selected="false").