javascript value before @ sign

I'm trying to suggest username for sign up page with jquery. im just wondering how can i get the value of email address before @ sign. right now i can get complete value with

$("#email").val(); 

s开发者_运维知识库hould i split it by @ or some other way?

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you can split a string using the split prototype function like so:

var Email = $("email").val();

var Suggestion = Email.split("@")[0]; // [0] for the first portion of the string.

@Resource : http://www.tizag.com/javascriptT/javascript-string-split.php

as this is a prototype of the string it can be used on any string like so:

var world = "Hello World".split(" ")[0];

regardless weather its set to a variable, or the value has come from a function, you would also be able to directly run after the val() method as it returns a string.

$("#email").val().split("@")[0]
//---------------^ String is returned here.

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var local = $('#email').val().split('@')[0];
//alert(local)

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Splitting by "@" it's perfect, if the email address is valid (ex. it match a regexp). It's not allowed more than one time in the address, so you are on the safe side. You can find more information on this topic here