NgModelGroup

From Get docs
< @angular/formsAngular/docs/11/api/forms/ngmodelgroup


NgModelGroup

directive

Creates and binds a FormGroup instance to a DOM element.

See more...

Exported from

Selectors

  • [ngModelGroup]

Properties

Property Description
@Input('ngModelGroup')name: string Tracks the name of the NgModelGroup bound to the directive. The name corresponds to a key in the parent NgForm.

Inherited from AbstractFormGroupDirective

  • control: FormGroup
  • path: string[]
  • formDirective: Form | null

Inherited from ControlContainer

  • name: string | number | null
  • formDirective: Form | null
  • path: string[] | null

Inherited from AbstractControlDirective

  • abstract control: AbstractControl | null
  • value: any
  • valid: boolean | null
  • invalid: boolean | null
  • pending: boolean | null
  • disabled: boolean | null
  • enabled: boolean | null
  • errors: ValidationErrors | null
  • pristine: boolean | null
  • dirty: boolean | null
  • touched: boolean | null
  • status: string | null
  • untouched: boolean | null
  • statusChanges: Observable<any> | null
  • valueChanges: Observable<any> | null
  • path: string[] | null
  • validator: ValidatorFn | null
  • asyncValidator: AsyncValidatorFn | null

Template variable references

Identifier Usage
ngModelGroup #myTemplateVar="ngModelGroup"

Description

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'};
  }
}

Inherited from AbstractControlDirective

  • reset(value: any = undefined): void
  • hasError(errorCode: string, path?: string | (string | number)[]): boolean
  • getError(errorCode: string, path?: string | (string | number)[]): any


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Licensed under the Creative Commons Attribution License 4.0.
https://v11.angular.io/api/forms/NgModelGroup