Saturday 17 February 2024

 What is Form Group and Form Control in Angular ? 079

  What is Form Group and Form Control in Angular ?

In Angular's reactive forms, form groups and form controls are fundamental building blocks for managing and validating user input. Here's a breakdown of their roles:

Form Control:

  • Represents a single input field in your form.

  • Tracks its value, validity, and touched/untouched state.

  • Can have built-in or custom validators applied.

  • Created using the FormControl class with an initial value and optional validators.



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

const nameControl = new FormControl('', Validators.required);

Form Group:

  • Aggregates multiple form controls into a logical unit, representing a complete form or a section of it.

  • Tracks the overall validity of the group based on the validity of its child controls.

  • Can have its own validators as well.

  • Created using the FormGroup class, passing an object where keys are control names and values are form controls.



const myForm = new FormGroup({
  name: nameControl,
  email: new FormControl('', [Validators.required,]),

Key Differences:


Form Control

Form Group


Single input field

Group of controls


Value, validity, state

Overall form validity


Can have validators

Can have own validators + child validators contribute


new FormControl()

new FormGroup({})

Benefits of using form groups:

  • Organize complex forms with nested structures.

  • Apply validation rules across multiple controls together.

  • Manage form state more effectively.


  • Form groups provide a higher level of abstraction and control for complex forms.

  • You can nest form groups to create even more intricate form structures.

  • Combine form controls and form groups to build robust and maintainable reactive forms in your Angular applications.

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