Are you looking for a way to validate email addresses in your Angular
applications? Look no further than email validation pattern in Angular! In
this article, we will discuss the importance of email validation and how to
implement it using Angular.

Why Validate Email Addresses?

Email validation is an essential part of any web application that requires
users to input their email address. It ensures that the email address is valid
and correctly formatted, which can help prevent errors and improve user
experience.

Implementing Email Validation in Angular

Angular provides several ways to validate email addresses in your application.
One of the most common ways is to use the built-in EmailValidator class, which
is part of the Angular Forms module.

To use the EmailValidator class, you need to import it from the @angular/forms
package and add it to your component's form controls. Here is an example:

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

@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
registerForm: FormGroup;
submitted = false;

constructor(private formBuilder: FormBuilder) { }

ngOnInit() {
this.registerForm = this.formBuilder.group({
email: ['', [Validators.required, Validators.email, EmailValidator.validate]]
});
}

get f() { return this.registerForm.controls; }

onSubmit() {
this.submitted = true;

// stop here if form is invalid
if (this.registerForm.invalid) {
return;
}

alert('SUCCESS!! :-)

' + JSON.stringify(this.registerForm.value));
}
}

In this example, we import the EmailValidator class from the @angular/forms
package and add it to our email form control's array of validators. We also
use the Validators.required and Validators.email validators to ensure that the
email field is not empty and is a valid email address.

Custom Email Validation Pattern

If you need to implement a custom email validation pattern, you can use the
pattern validator provided by Angular. Here is an example:

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

@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
registerForm: FormGroup;
submitted = false;

constructor(private formBuilder: FormBuilder) { }

ngOnInit() {
this.registerForm = this.formBuilder.group({
email: ['', [Validators.required, Validators.pattern('[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$')]]
});
}

get f() { return this.registerForm.controls; }

onSubmit() {
this.submitted = true;

// stop here if form is invalid
if (this.registerForm.invalid) {
return;
}

alert('SUCCESS!! :-)

' + JSON.stringify(this.registerForm.value));
}
}

In this example, we use the pattern validator to validate the email field. The
pattern validator takes a regular expression as an argument and checks if the
input matches the pattern. In this case, we use a regular expression that
matches most email addresses.

Conclusion

Email validation is an important feature of any web application that requires
user input. With Angular, it is easy to implement email validation using the
built-in EmailValidator class or a custom pattern validator. By implementing
email validation, you can ensure that your application is more robust and
user-friendly.