Angular2 表单 "required" 绑定 - 未执行验证

Question

我在将动态 "required" 绑定到输入时遇到问题。输入总是无效的，并且不与 required 属性交互。请看看我的Plunkr。可能是我遗漏了什么？

@Component({
  selector: 'my-app',
  template: `
  <form #heroForm="ngForm">
    Set Required <input type="checkbox" [(ngModel)]="req">
    <input #inp ngControl="something" type="text" [(ngModel)]="myModel" [required]="req" #spy><br>
    required: {{req}}<br>
    required attribute: {{!!spy.attributes.getNamedItem("required")}}<br>
    classes: {{spy.className}}<br>
  </form>
  `
})

Answer 1

目前required需要静态添加否则Angular不会初始化验证器

<input #inp ngControl="something" type="text" [(ngModel)]="myModel" required #spy><br>

计划进行更改。

Angular2 表单 "required" 绑定 - 未执行验证

Angular2 form "required" binding - validation not performed

angular2-forms

angular