validate: (value: any) => {
				if (value === "" || emailValidator.validate(value)) {
					return true;
				}

				return "Please provide a valid e-mail or simply leave it blank.";
			}

 signin(email:string){
   console.info(email);
   if(!validator.validate(email)){
     alert("invalid email address");
   }
   this._router.navigate(["Home"]);
 }

 /**
  * Is email valid.
  */
 public isValid(): boolean {
   return !!(
     validate(this.to) &&
     this.subject &&
     this.text &&
     this.html
   );
 }

 validateUser(processType) {
   let phoneRegex: any = /^[0-9]{10}$/;
   if (!validator.validate(this.email)) {
     return false;
   } else if (!this.password) {
     return false;
   }
   else if (processType && processType === "signUp" && (!phoneRegex.test(this.phone) || !this.name)) {
     return false;
   } else {
     return true;
   }
 }

 isValid() {
     return validator.validate(this.email);
 }

/// <reference path="email-validator.d.ts" />

import emailValidator = require('email-validator');
import { validate } from 'email-validator';

var result: boolean;

// Trivial code requires trivial tests
result = validate('some email');
result = validate(null);

result = emailValidator.validate('some email');
result = emailValidator.validate(null);

 /**
  * Validate the user email.
  */
 public isValidEmail(): boolean {
   return validate(this.email);
 }

 isValid(): boolean {
   return validator.validate(this.email);
 }