var currentURL = $(location).attr('href');
var currentURL = window.location.href;<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>jQuery Get Current Page URL</title>
<script src="https://code.jquery.com/jquery-1.12.4.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
var currentURL=location.protocol + '//' + location.host + location.pathname;
alert(currentURL);
});
});
</script>
</head>
<body>
<button type="button">Get URL</button>
</body>
</html>