When the window is resized, the resize event is triggered. Use the window.outerWidth and window.outerHeight events in JavaScript to get the window size when the browser resizes.
You can try running the following code to use the onresize event in JavaScript.
<!DOCTYPE html>
<html>
<head>
<script>
function resizeFunction() {
var val = "Window Width=" + window.outerWidth + ", Window Height=" + window.outerHeight;
document.getElementById("test").innerHTML = val;
}
</script>
</head>
<body onresize="resizeFunction()">
<p>Resize browser window and check the window (browser window) height and width again.</p>
<p id = "test"> </p>
</body>
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