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<!DOCTYPE html>
<html>
<body>
​
<p>Click the button to change its background color.</p>
​
<button id="myBtn">Try it</button>
​
<script>
document.getElementById("myBtn").addEventListener("click", function(){
  this.style.backgroundColor = "red";
});
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_element_addeventlistener5 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:17 GMT -->
</html>
​
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