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...
<button type="button" (click)="addAlias()">+ Add another alias</button> <div *ngFor="let alias of aliases.controls; let i = index" [formGroupName]="i" > <label for="street-{{ i }}">Street-{{ i + 1 }}: </label> <input id="street-{{ i }}" type="text" formControlNa...
Well, the answer is really simple, because "[formGroup]=form", this "form" is an JS object. "store" is just an prop on the "form" object, so ALL the props-like stuff, we add "xxxName", like "formGroupName" and "formControlName". Now Angular is ready to take over the data b...
Well, the answer is really simple, because "[formGroup]=form", this "form" is an JS object. "store" is just an prop on the "form" object, so ALL the props-like stuff, we add "xxxName", like "formGroupName" and "formControlName". Now Angular is ready to take over the data b...
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 ...
在使用 ngModel 进行模板绑定时,angular 在 form 标签上自动附加了一个 NgForm 指令,因为 NgForm 指令会控制表单中带有 ngModel 指令和 name 属性的元素,而...在数据验证失败的情况下,对于系统来说,表单是不允许提交的,因此可以将提交事件绑定到表单的 ngSubmit 事件.
zone.js:461 Unhandled Promise rejection: EXCEPTION: Error in ./FormComponent class FormComponent - inline template:4:25 ORIGINAL EXCEPTION: TypeError: this.form.get is not a function ORIGINAL STACKTRACE: TypeError: this.form.get is not a function at FormGroupDirective.addControl (https://tahseen...
另一方面,Promise代表一个尚未实现的值,这正是HTTP请求所提供的内容。我花了几个小时强迫Observables执行,然后放弃使用Observable.prototype.toPromise将Observable转换为Promise并简单地使用Promise.all,它比任何Rx.js提供的工作好得多。 实际上,感谢RxJS,如果您开始将流数据视为流,则易于操作。
* **compiler-cli:** add `useInlining` option to type check config ([#41043](https://github.com/angular/angular/issues/41043)) ([09aefd2](https://github.com/angular/angular/commit/09aefd29045db77689f4dc16a6abae09a79cfb81)), closes [#40963](https://github.com/angular/angular/issues...
Cant bind to formGroup since it isnt a known property of form错误解决方案 最近学习了下angular,利用Angular CLI 在本地搭建了个环境,然后装了个ant.design的NG-ZORRO库,试了下用ui的脚手架来创建组件 ng g ng-zorro-antd:form-normal-login...login 创建完成发现访问项目的时候,在使用nz-form时报错C...