nombre: this.fb.control(/*initial value*/'', /*validators that they should pass*/[]')', url:this.fb.control(/*initial value*/'', /*validators that they should pass*/[]')' }); 所以您创建了一个FormControl,而不是Array<string> 下面是一个使用reactive表单的模板示例: <!-- component.t...
所有表单指令,包括上面代码中的formControl指令,都会调用setUpControl函数来让表单控件和DefaultValueAccessor实现交互(译者注:意思就是上面代码中绑定的formControl指令,在其自身实例化时,会调用setUpControl()函数给同样绑定到input的DefaultValueAccessor指令做好安装工作,如L85,这样formControl指令就可以借助DefaultValueAccessor...
下图是Angular 表单控件如何通过ControlValueAccessor来和原生表单控件交互的(译者注:formControl和你写的或者 Angular 提供的CustomControlValueAccessor两个都是要绑定到 native DOM element 的指令,而formControl指令需要借助CustomControlValueAccessor指令/组件,来和 native DOM element 交换数据。): image.png 再次强调,...
Angular FormControl is an inbuilt class that is used to get and set values and validation of the form control fields like <input> or <select>. The FormControl tracks the value and validation status of an individual form control. It can be used standalone as well as with a parent form. ...
formControl指令使用writeValue方法设置原生表单控件的值(译者注:你可能会参考L186和L41);使用registerOnChange方法来注册由每次原生表单控件值更新时触发的回调函数(译者注:你可能会参考这三行,L186和L43,以及L85),你需要把更新的值传给这个回调函数,这样对应的 Angular 表单控件值也会更新(译者注:这一点可以参考 Ang...
FormGroup: FormGroup has the role to track the value and validity state of a group of FormControl. FormArray: FormArray tracks the value and validity state of the array of FormControl, FormGroup, or FormArray instances. Template-Driven Form ...
FormsModule包含的指令为ngModel和NgForm,ReactiveFormsModule包含的指令为formControl和ngFormGroup。 b)比如创建这样一个简单的Form html为: 这里使用了ngForm,属于第一种方式FormControl,定义了FormGroup以及(ngSubmit)输出,并把ngForm绑定到了#f变量,所以onSubmit传递的参数为f.Value,就是当前的FormGroup,点击提交,...
问如何在formGroup中使用angular动态设置formControl的值？EN如果您希望formControl作为动态密钥，则需要在[...
To make it a non-breaking change, we can potentially think of some additional APIs to define what the default value should be (like new FormControl(undefined, {defaultValue: undefined}) on per-control basis or FormControl.useAsDefault(undefined) to set if globally). In any case, this ...
🚀 feature request Relevant Package This feature request is for @angular/forms Description I would like see disable control value in onSubmit when we do (this.myForm.value). There are some situation where we want to disable control with d...