Angular 2 Angular 2 Data Driven Forms Data driven form
Example
Component
import {Component, OnInit} from '@angular/core';
import {
FormGroup,
FormControl,
FORM_DIRECTIVES,
REACTIVE_FORM_DIRECTIVES,
Validators,
FormBuilder,
FormArray
} from "@angular/forms";
import {Control} from "@angular/common";
@Component({
moduleId: module.id,
selector: 'app-data-driven-form',
templateUrl: 'data-driven-form.component.html',
styleUrls: ['data-driven-form.component.css'],
directives: [FORM_DIRECTIVES, REACTIVE_FORM_DIRECTIVES]
})
export class DataDrivenFormComponent implements OnInit {
myForm: FormGroup;
constructor(private formBuilder: FormBuilder) {}
ngOnInit() {
this.myForm = this.formBuilder.group({
'loginCredentials': this.formBuilder.group({
'login': ['', Validators.required],
'email': ['', [Validators.required, customValidator]],
'password': ['', Validators.required]
}),
'hobbies': this.formBuilder.array([
this.formBuilder.group({
'hobby': ['', Validators.required]
})
])
});
}
removeHobby(index: number){
(<FormArray>this.myForm.find('hobbies')).removeAt(index);
}
onAddHobby() {
(<FormArray>this.myForm.find('hobbies')).push(new FormGroup({
'hobby': new FormControl('', Validators.required)
}))
}
onSubmit() {
console.log(this.myForm.value);
}
}
function customValidator(control: Control): {[s: string]: boolean} {
if(!control.value.match("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?")) {
return {error: true}
}
}
HTML Markup
<h3>Register page</h3>
<form [formGroup]="myForm" (ngSubmit)="onSubmit()">
<div formGroupName="loginCredentials">
<div class="form-group">
<div>
<label for="login">Login</label>
<input id="login" type="text" class="form-control" formControlName="login">
</div>
<div>
<label for="email">Email</label>
<input id="email" type="text" class="form-control" formControlName="email">
</div>
<div>
<label for="password">Password</label>
<input id="password" type="text" class="form-control" formControlName="password">
</div>
</div>
</div>
<div class="row" >
<div formGroupName="hobbies">
<div class="form-group">
<label>Hobbies array:</label>
<div *ngFor="let hobby of myForm.find('hobbies').controls; let i = index">
<div formGroupName="{{i}}">
<input id="hobby_{{i}}" type="text" class="form-control" formControlName="hobby">
<button *ngIf="myForm.find('hobbies').length > 1" (click)="removeHobby(i)">x</button>
</div>
</div>
<button (click)="onAddHobby()">Add hobby</button>
</div>
</div>
</div>
<button type="submit" [disabled]="!myForm.valid">Submit</button>
</form>
