Generic email validator

Question

I want to create a form where the user will enter his email. I\'d like to validate email format client-side.

Is there any generic email validator in Angular 2?

Answer 1

Yet another way to do this is using a custom directive. I like this approach as it's more consistent with the other ng2 validators.

import { Directive, forwardRef } from '@angular/core';
import { NG_VALIDATORS } from '@angular/forms';
import { Validator, AbstractControl } from '@angular/forms';


@Directive({
    selector: '[validateEmail][formControlName], [validateEmail][formControl],[validateEmail][ngModel]',
    providers: [
        { provide: NG_VALIDATORS, useExisting: forwardRef(() => EmailValidator), multi: true }
    ]
})
export class EmailValidator implements Validator {

    constructor() {
    }

    validate(c: AbstractControl) {
        let EMAIL_REGEXP = /^[a-z0-9!#$%&'*+\/=?^_`{|}~.-]+@[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/i;

        return EMAIL_REGEXP.test(c.value) ? null : {
            validateEmail: {
                valid: false
            }
        };


    }}

Then usage in html is