What is Validators class in Angular?

The Validators class in Angular is a built-in class that is used to perform validations on form controls. It provides a set of static methods that can be used to create custom validation functions for form controls in an Angular application.

For example, the Validators class includes methods such as required, min, max, pattern, and email, which can be used to create validation rules for input fields in a form. These validation functions can then be added to form controls using the FormControl or FormGroup classes in Angular.

Here is an example of how the Validators class can be used to create a custom validation function for a form control:

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

@Component({
  selector: 'app-my-form',
  template: `
    
      
    
  `,
  styleUrls: ['./my-form.component.css']
})
export class MyFormComponent implements OnInit {
  myForm: FormGroup;

  ngOnInit() {
    this.myForm = new FormGroup({
      email: new FormControl('', [
        Validators.required,
        Validators.email
      ])
    });
  }
}
  

In this example, the Validators.required and Validators.email methods from the Validators class are used to create validation rules for the email input field in the form. These validation rules are then added to the email form control using the FormControl class in Angular.

The Validators class in Angular is a powerful tool for performing form validation in Angular applications. It provides a wide range of built-in validation functions and also allows for the creation of custom validation functions to suit specific validation requirements.