CheckboxRequiredValidator
该指令会借助 NG_VALIDATORS 绑定把 required 验证器添加到任何带有 required 属性的检查框控件上。
A Directive that adds the required validator to checkbox controls marked with the required attribute. The directive is provided with the NG_VALIDATORS multi-provider list.
参见
NgModules
选择器
input[type=checkbox][required][formControlName]input[type=checkbox][required][formControl]input[type=checkbox][required][ngModel]
继承自 RequiredValidator
说明
使用模板驱动表单为复选框添加必填项验证器
Adding a required checkbox validator using template-driven forms
下面的例子展示了如何为一个带有 ngModel 绑定的检查框添加必填项验证器。
The following example shows how to add a checkbox required validator to an input attached to an* ngModel binding.
<input type="checkbox" name="active" ngModel required>
方法
Method that validates whether or not the checkbox has been checked. Returns the validation result if enabled, otherwise null. | |||
参数
返回值
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