angular__angular/src/material-examples/input-errors/input-errors-example.ts

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

const EMAIL_REGEX = /^[a-zA-Z0-9.!#$%&’*+/=?^_`{|}~-]+@[a-zA-Z0-9-]+(?:\.[a-zA-Z0-9-]+)*$/;

@Component({
  selector: 'input-errors-example',
  templateUrl: 'input-errors-example.html',
  styleUrls: ['input-errors-example.css'],
})
export class InputErrorsExample {

  emailFormControl = new FormControl('', [
    Validators.required,
    Validators.pattern(EMAIL_REGEX)]);

}