Binds an existing FormGroup to a DOM element.

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See also

• Reactive Forms Guide

• AbstractControl

Exported from

• ReactiveFormsModule

Selectors

• [formGroup]

Properties

Inherited from ControlContainer

• name: string | number | null
• formDirective: Form | null
• override
• 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

Description

This directive accepts an existing FormGroup instance. It will then use this FormGroup instance to match any child FormControl, FormGroup, and FormArray instances to child FormControlName, FormGroupName, and FormArrayName directives.

Register Form Group

The following example registers a FormGroup with first name and last name controls, and listens for the ngSubmit event when the button is clicked.

import {Component} from '@angular/core';
import {FormControl, FormGroup, Validators} from '@angular/forms';

@Component({
  selector: 'example-app',
  template: `
    <form [formGroup]="form" (ngSubmit)="onSubmit()">
      <div *ngIf="first.invalid"> Name is too short. </div>

      <input formControlName="first" placeholder="First name">
      <input formControlName="last" placeholder="Last name">

      <button type="submit">Submit</button>
   </form>
   <button (click)="setValue()">Set preset value</button>
  `,
})
export class SimpleFormGroup {
  form = new FormGroup({
    first: new FormControl('Nancy', Validators.minLength(2)),
    last: new FormControl('Drew'),
  });

  get first(): any {
    return this.form.get('first');
  }

  onSubmit(): void {
    console.log(this.form.value);  // {first: 'Nancy', last: 'Drew'}
  }

  setValue() {
    this.form.setValue({first: 'Carson', last: 'Drew'});
  }
}

Methods

Inherited from AbstractControlDirective

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