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<!DOCTYPE html>
<html>
<body>
​
<p>If the viewport is less than, or equal to, 700 pixels wide, the background color will be yellow. If it is greater than 700, it will change to pink.</p>
<p>Resize the browser window to see the effect.</p>
​
<script>
function myFunction(x) {
  if (x.matches) { // If media query matches
    document.body.style.backgroundColor = "yellow";
  } else {
    document.body.style.backgroundColor = "pink";
  }
}
​
var x = window.matchMedia("(max-width: 700px)")
myFunction(x) // Call listener function at run time
x.addListener(myFunction) // Attach listener function on state changes
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_matchmedia2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:04:10 GMT -->
</html>
​
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