API 参考手册
API > @angular/forms

NgModelGroup

Creates and binds a FormGroup instance to a DOM element.

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NgModule

选择器

属性

属性说明
@Input('ngModelGroup')
name: string

Tracks the name of the NgModelGroup bound to the directive. The name corresponds to a key in the parent NgForm.

继承自 AbstractFormGroupDirective

继承自 ControlContainer

继承自 AbstractControlDirective

模板变量参考手册

标识符用途
ngModelGroup#myTemplateVar="ngModelGroup"

说明

This directive can only be used as a child of NgForm (within <form> tags).

Use this directive to validate a sub-group of your form separately from the rest of your form, or if some values in your domain model make more sense to consume together in a nested object.

Provide a name for the sub-group and it will become the key for the sub-group in the form's full value. If you need direct access, export the directive into a local template variable using ngModelGroup (ex: #myGroup="ngModelGroup").

Consuming controls in a grouping

The following example shows you how to combine controls together in a sub-group of the form.

import {Component} from '@angular/core'; import {NgForm} from '@angular/forms'; @Component({ selector: 'example-app', template: ` <form #f="ngForm" (ngSubmit)="onSubmit(f)"> <p *ngIf="nameCtrl.invalid">Name is invalid.</p> <div ngModelGroup="name" #nameCtrl="ngModelGroup"> <input name="first" [ngModel]="name.first" minlength="2"> <input name="last" [ngModel]="name.last" required> </div> <input name="email" ngModel> <button>Submit</button> </form> <button (click)="setValue()">Set value</button> `, }) export class NgModelGroupComp { name = {first: 'Nancy', last: 'Drew'}; onSubmit(f: NgForm) { console.log(f.value); // {name: {first: 'Nancy', last: 'Drew'}, email: ''} console.log(f.valid); // true } setValue() { this.name = {first: 'Bess', last: 'Marvin'}; } }
      
      
  1. import {Component} from '@angular/core';
  2. import {NgForm} from '@angular/forms';
  3.  
  4. @Component({
  5.   selector: 'example-app',
  6.   template: `
  7.     <form #f="ngForm" (ngSubmit)="onSubmit(f)">
  8.       <p *ngIf="nameCtrl.invalid">Name is invalid.</p>
  9.     
  10.       <div ngModelGroup="name" #nameCtrl="ngModelGroup">
  11.         <input name="first" [ngModel]="name.first" minlength="2">
  12.         <input name="last" [ngModel]="name.last" required>
  13.       </div>
  14.       
  15.       <input name="email" ngModel> 
  16.       <button>Submit</button>
  17.     </form>
  18.     
  19.     <button (click)="setValue()">Set value</button>
  20.   `,
  21. })
  22. export class NgModelGroupComp {
  23.   name = {first: 'Nancy', last: 'Drew'};
  24.  
  25.   onSubmit(f: NgForm) {
  26.     console.log(f.value);  // {name: {first: 'Nancy', last: 'Drew'}, email: ''}
  27.     console.log(f.valid);  // true
  28.   }
  29.  
  30.   setValue() { this.name = {first: 'Bess', last: 'Marvin'}; }
  31. }

继承自 AbstractFormGroupDirective

继承自 AbstractControlDirective