RequiredValidator
该指令会借助 NG_VALIDATORS 绑定把 required 验证器添加到任何带 required 属性的控件上。
A directive that adds the required validator to any controls marked with the required attribute. The directive is provided with the NG_VALIDATORS multi-provider list.
参见
Exported from
选择器
:not([type=checkbox])[required][formControlName]:not([type=checkbox])[required][formControl]:not([type=checkbox])[required][ngModel]
属性
| 属性 | 说明 |
|---|---|
@Input() | 跟踪对该指令绑定的 required 属性的更改。 Tracks changes to the required attribute bound to this directive. |
说明
使用模板驱动表单添加必填项验证器
Adding a required validator using template-driven forms
<input name="fullName" ngModel required>
