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<!DOCTYPE html>
<html>
<body>
​
<ul class="example">
  <li class="child">Coffee</li>
  <li class="child">Tea</li>
</ul>
​
<p>Click the button to change the text of the first list item (index 0).</p>
​
<button onclick="myFunction()">Try it</button>
​
<p><strong>Note:</strong> The getElementsByClassName() method is not supported in Internet Explorer 8 and earlier versions.</p>
​
<script>
function myFunction() {
  var list = document.getElementsByClassName("example")[0];
  list.getElementsByClassName("child")[0].innerHTML = "Milk";
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_element_getelementsbyclassname by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 14:03:56 GMT -->
</html>
​
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