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<!DOCTYPE html>
<html>
<body>
​
<p>The addEventListener() method is not supported Internet Explorer 8 and earlier versions.</p>
​
<p>This example demonstrates a solution that will work for all browsers.</p>
​
<button id="myBtn">Try it</button>
​
<script>
var x = document.getElementById("myBtn");
if (x.addEventListener) {
  x.addEventListener("click", myFunction);
} else if (x.attachEvent) {
  x.attachEvent("onclick", myFunction);
}
​
function myFunction() {
  alert("Hello World!");
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_element_addeventlistener_crossbrowser by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:17 GMT -->
</html>
​
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