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'; import...
import { ReactiveFormsModule } from '@angular/forms'; template 实现代码: <input type="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'; i...
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...
passwordsMustMatch(password:string,confirmPassword:string){return(formGroup:FormGroup)=>{constcontrol=formGroup.controls[password];constmatchingControl=formGroup.controls[confirmPassword];if(matchingControl.errors&&!matchingControl.errors.passwordsMustMatch){// return if another validator has already found an...
It it recommeded that when deals with form component, we can create a container component to hold state, and then create a stateless component to enpower the form. For example: In the example has two components, one is container component 'meal.component.ts', another is statless component ...
So let's take an example first before explain some details stuff: import { Component } from '@angular/core'; import { FormControl, FormGroup } from '@angular/forms'; @Component({ ... template: `<divclass="stock-inventory"><form[formGroup]="form"><divformGroupName="store"><inputtype...
<input [formControl]="name"> 1. Okay, let’s take a basic example. First, create a new angular project. Then import the ReactiveFormsModule inside the app.module.ts file. // app.module.ts import { BrowserModule } from '@angular/platform-browser'; ...
Set a string value to the form control, e.g., email.setValue('angularrox@gmail.com'). Observe that no TypeScript error is raised. Explicitly define the type as FormControl and re-attempt setting a value. Expected Behavior: An error should occur when setting a value that does not match...
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。而且因为是同步,有利于单元测试。 在Template-driven Form(异步)中,我们是通过指令来创建form control的。我们在操作一个Form control之前,必须要经历一个...
(Reactive Form) 响应式表表单:原理是一开始就构建整个表单,表单的值通过特殊指令formControlName一一关联(类似ngModel); 相关名词: FormGroup: 用来追踪表单控件有效状态及值...FormArray()),FormGroup()内置多种校验方式 formControlName: 同步与FormGroup构建表单内相同字段的值!...//...