在Angular中使用FormArray是一种处理动态表单的方法。FormArray是一个表单控件,用于管理一组表单控件的值和验证状态。 FormArray可以用于创建重复的表单控件,例如多个输入框或复选框。它可以动态地添加、删除和更新表单控件。 使用FormArray的步骤如下: 在组件中导入必要的模块和类: 代码语言:txt 复制 import { Compon...
将myArray类型声明为FormArray<FormGroup<MyTypeForm>>. myArray: FormArray<FormGroup<MyTypeForm>>; Run Code Online (Sandbox Code Playgroud) _newElement返回类型的方法FormGroup<MyTypeForm>。 private _newElement(): FormGroup<MyTypeForm> { return this._formBuilder.group<MyTypeForm>({ myValue: this...
官方例子里说了FormArray可以嵌套group或者array,但只给了control的实例,这里记录一下嵌套group ts文件: import { Component } from '@angular/core'; import { FormBuilder } from '@angular/forms'; import { Validators } from '@angular/forms'; import { FormArray } from '@angular/forms'; @Component(...
在以往动态处理 FormGroup 和 FormArray 嵌套表单时,通常要写一大堆的长长的形如这样的代码: <formnz-form[formGroup]="form"><divformArrayName="teacher"><divnz-form-control*ngFor="let m of teachers.controls;index as isFirst"><div[formGroupName]="isFirst"><inputnz-inputformControlName="name"/...
在Angular4中使用FormArray时,可能会遇到一些奇怪的行为。下面是一些解决这些问题的方法: 1. 首先,确保你已经导入了FormsModule或ReactiveFormsModule。这...
1.导入 FormArray 类。 2.定义一个 FormArray 控件。 3.使用 getter 方法访问 FormArray 控件。 4.在模板中显示这个表单数组。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
1.FormControl:单个独立的表单控件; 2.FormGroup:一组FormControl实例; 3.FormArray:控件数组,控件可为FormControl、FormGroup、FormArray的实例; FormBuilder: 根据用户指定的配置创建 abstractControl,FormBuilder提供的语法糖可快速实例化FormControl、FormGroup、FormArray。
I'm having trouble creating a select in Angular2 that is backed by an array of Objects instead of strings. I knew how to do it in AngularJS using ngOptions, but it doesn't seem to work in Angular2 (I'm using alpha 42). In the sample below, I have five selects, but only ...
formarray class object View more ahmedhalawa published1.0.66•a month agopublished 1.0.66 a month ago M Q P @everymundo/ngx-sortablejs This package is an Angular 2+ binding for [Sortable.js](https://github.com/RubaXa/Sortable). Supports standard arrays and Angular `FormArray`. ...
Forms model classes now accept a generic type parameter. Untyped versions of these classes are available to opt-out of the new, stricter behavior. - objects with a length key set to zero will no longer validate as empty. This is technically a breaking change, since objects with a key `len...