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<!DOCTYPE html>
<html>
<head>
<script src="../../ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("#span1").text($(window).width());
    $("#span2").text($(document).width());
  });
});
</script>
</head>
<body>
​
<p>The width of this window is <span id="span1">unknown</span> px.</p>
<p>The width of this document is <span id="span2">unknown</span> px.</p>
​
<button>Return the width of the window and document elements</button>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jquery/tryit.asp?filename=tryjquery_css_width_doc_win by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:33:39 GMT -->
</html>
​
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