FormsModulelink

A ControlValueAccessor for writing a value and listening to changes on a checkbox input element.

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.

The default ControlValueAccessor for writing a value and listening to changes on input elements. The accessor is used by the FormControlDirective, FormControlName, and NgModel directives.

该指令会借助 NG_VALIDATORS 绑定把 email 验证器添加到任何带有 email 属性的控件上。

A directive that adds the email validator to controls marked with the email attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

该指令用于为带有 maxlength 属性的控件添加最大长度验证器。该指令会提供 NG_VALIDATORS 多重提供商列表。

A directive that adds max length validation to controls marked with the maxlength attribute. The directive is provided with the NG_VALIDATORS multi-provider list.

该指令用于为带有 minlength 属性的控件添加最小长度验证器。该指令会提供 NG_VALIDATORS 多重提供商列表。

A directive that adds minimum length validation to controls marked with the minlength attribute. The directive is provided with the NG_VALIDATORS mult-provider list.

Directive automatically applied to Angular form controls that sets CSS classes based on control status.

Directive automatically applied to Angular form groups that sets CSS classes based on control status (valid/invalid/dirty/etc).

创建一个顶级的 FormGroup 实例，并把它绑定到一个表单，以跟踪表单的聚合值及其验证状态。

Creates a top-level FormGroup instance and binds it to a form to track aggregate form value and validation status.

已弃用: in Angular v6 and will be removed in Angular v9.

This directive is solely used to display warnings when the deprecated ngForm selector is used.

根据领域对象创建一个 FormControl 实例，并把它绑定到一个表单控件元素上。

Creates a FormControl instance from a domain model and binds it to a form control element.

Creates and binds a FormGroup instance to a DOM element.

把选项 <option> 标记为动态的，这样 Angular 就会在选项变化时得到通知。

Marks <option> as dynamic, so Angular can be notified when options change.

该指令会借助 NG_VALIDATORS 绑定来把 pattern 验证器添加到任何带有 pattern 属性的控件上。 它会使用该属性的值作为正则表达式来验证控件的值。 它会遵循 pattern 属性的语义，也就是说，该正则表达式必须匹配整个控件值。

A directive that adds regex pattern validation to controls marked with the pattern attribute. The regex must match the entire control value. The directive is provided with the NG_VALIDATORS multi-provider list.

The ControlValueAccessor for writing radio control values and listening to radio control changes. The value accessor is used by the FormControlDirective, FormControlName, and NgModel directives.

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.

该 ControlValueAccessor 用于写入 select 控件的值，并监听 select 控件的变化。该值访问器会被 FormControlDirective、FormControlName 和 NgModel 指令使用。

The ControlValueAccessor for writing select control values and listening to select control changes. The value accessor is used by the FormControlDirective, FormControlName, and NgModel directives.

The ControlValueAccessor for writing multi-select control values and listening to multi-select control changes. The value accessor is used by the FormControlDirective, FormControlName, and NgModel directives.