首先,确保你已经导入了FormControl和FormGroup类,以及ReactiveFormsModule模块。在组件的顶部添加以下导入语句: 代码语言:txt 复制 import { FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms'; 在组件类中创建一个FormGroup对象,并在其中定义一个FormControl对象。例如: 代码语言:txt ...
import { Component, OnInit } from '@angular/core'; // 引入 FormControl 对象 import { FormControl } from '@angular/forms'; @Component({ selector: 'app-reactive-forms', templateUrl: './reactive-forms.component.html', styleUrls: ['./reactive-forms.component.scss'] }) export class Reactiv...
由于之前开发过一个Ionic2项目,使用的是Template-driven Form,光是校验就有一坨代码,维护与开发简直惨不忍睹,所以个人更加推荐使用Reactive Form。 使用Reactive Form(同步),我们会在代码中创建整个表单form control树。我们可以立即更新一个值或者深入到表单中的任意节点,因为所有的Form control都始终是可用的。而且因...
import{ Component, OnInit, Input, OnChanges, OnDestroy } from'@angular/core';import{ Hero, Address } from'../model/model';import{ FormBuilder, FormGroup, FormArray, AbstractControl, FormControl } from'@angular/forms';import{ HeroService } from'../hero.service';import{ provinces } from'....
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.template.html --> <form [formGroup]="group"> ...
Reactive Form创建方法 首先我们需要使用FormBuilder创建一个FormGroup,就像这样: registerForm: FormGroup;constructor(privatefb: FormBuilder, ){}ngOnInit(){ this.registerForm = this.fb.group({ firstName: [''], lastName: [''], }) } 上面的firstName和lastName是由你自己取的,分别表示一个表单控件...
import { ReactiveFormsModule } from '@angular/forms'; template 实现代码: <inputtype="text"[formControl]="jerryFormControl"><div>{{ response }}</div> 其中formControl Directive,绑定的是 FormControl 具体实例。Component 完整的实现代码: import { Component, OnInit } from '@angular/core'; ...
Reactive Forms Creating a form using FormControl, FormGroup, and FormArray are said to be reactive forms. They use the ng module as ReactiveFormsModule. 3.9M FormControl: FormControl is the class that is used to get and set values and validation of the form control such as <input> and ...
imports: [NgFor, NgIf, ReactiveFormsModule], template: ` <div [formGroup]="form"> <label for="{{ key }}"> <span>{{ config['label'] || 'Label' }}</span> <input [id]="key" [name]="key" [formControlName]="key" /> <ng-container *ngFor="let error of config['errors'] ...
ReactiveFormsModule, MatSlideToggleModule, StoreModule.forRoot(reducers), EffectsModule.forRoot([AuthEffects]), MatSortModule ] 下面是我的html和ts代码来自组件: HTML <form [formGroup]="filtroForm"> <mat-form-field appearance="none"> <mat-select formControlName="modalidade"> ...