在上面的例子中,通过new FormControl('default value')设置了一个名为myControl的FormControl对象,并将其初始值设置为'default value'。然后,在模板中使用formControl指令将该FormControl对象与输入框绑定。 除了使用setValue方法设置默认输入值外,还可以在创建FormControl对象时通过传入一个对象来设置更复杂的默认输入值...
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...
value = "page", required = false, defaultValue = "1") Integer page, @RequestParam(value ...
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. ...
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 ...
form =newFormGroup({first:newFormControl("Nancy",Validators.minLength(2)),last:newFormControl("Drew"), });getfirst():any{returnthis.form.get("first"); }onSubmit():void{console.log(this.form.value);// {first: 'Nancy', last: 'Drew'}}setValue() {this.form.setValue({first:"Carson"...
interfaceControlValueAccessor{writeValue(obj:any):voidregisterOnChange(fn:any):voidregisterOnTouched(fn:any):void...} 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,L...
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...
🚀 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...
reactiveForm: FormGroup; video: Video; constructor(fb: FormBuilder) {this.reactiveForm =fb.group({//title <-- formControlName="title"title: ['Title',//<-- Default value[ Validators.required, Validators.minLength(3) ]//<-- Validations], ...