Angular2 email validation

Question

I am new in learning Angular2, and I want to make a validation form that verifies emails after a RegEx pattern.

My code looks something like this but I don\'t have a

Answer 1

For multiple email validation in a single field, you can do using the custom email validator.

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

export class EmailValidator {

public static isValid(email) {
    var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return re.test(String(email).toLowerCase());
}

static isMultiValid(control: FormControl): any {

  console.log(control.value);
  let tempEmail = control.value;
  let invalid = false;
  let regex =/[a-z0-9!#$%&'*+=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/g;

  if(tempEmail.indexOf(',') > -1){
    var emails = control.value.split(',');
      for (let email of emails) {
        console.log(email);
        let isValid = EmailValidator.isValid(email)
        if(!isValid){
          return{"email not valid":isValid}
        }
      }
      return null;
  }
  else{
    let email = control.value.split(',');
    if( email == "" || ! regex.test(email)){
        invalid = true;
        return {
            "email not valid": invalid
        };
    }
    console.log("valid");
    return null;

   }
  }
}

.

Answer 2

Angular 4 has a built-in "email" validation tag that can be added within the input. E.g.:

<input type="email" id="contactemail" email>

This will be valid for a series of numbers and letters then an @ then another series of letters. It will not account for the dot after the @ -- for that you can use the "pattern" tag within the input and your standard regex.

Answer 3

This pattern worked for me :

 pattern="[a-zA-Z0-9.-]{1,}@[a-zA-Z.-]{2,}[.]{1}[a-zA-Z]{3,}"