regex - How to validate email address in JavaScript? -

how can email address validated in javascript?

using regular expressions best way. can see bunch of tests here (taken chromium)

function validateemail(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(email); } 

here's example of regular expresion accepts unicode:

var re = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i; 

but keep in mind 1 should not rely upon javascript validation. javascript can disabled. should validated on server side well.

here's example of above in action:

function validateemail(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(email);  }    function validate() {    $("#result").text("");    var email = $("#email").val();    if (validateemail(email)) {      $("#result").text(email + " valid :)");      $("#result").css("color", "green");    } else {      $("#result").text(email + " not valid :(");      $("#result").css("color", "red");    }    return false;  }    $("#validate").bind("click", validate);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>    <form>    <p>enter email address:</p>    <input id='email'>    <button type='submit' id='validate'>validate!</button>  </form>    <h2 id='result'></h2>