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<!DOCTYPE html>
<html>
<body>
​
<p>Open a new window, and resize the width and height to 250px:</p>
<p><b>Tip:</b> Press the "Resize window" multiple times (the window will increase 250px for each press).</p>
​
<button onclick="openWin()">Create window</button>
<button onclick="resizeWin()">Resize window</button>
​
<script>
var myWindow;
​
function openWin() {
  myWindow = window.open("", "", "width=100, height=100");
}
​
function resizeWin() {
  myWindow.resizeBy(250, 250);
  myWindow.focus();
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_resizeby by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:10 GMT -->
</html>
​
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