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Result Size: 625 x 571
x
 
<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
  border: 1px solid black;
}
</style>
</head>
<body>
<div id="myDIV">
  <h2 class="example">A heading with class="example" in div</h2>
  <p class="example">A paragraph with class="example" in div.</p> 
</div>
<p>Click the button to change the text of the first element with class="example" in div.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
  var x = document.getElementById("myDIV");
  x.querySelector(".example").innerHTML = "Hello World!";
}
</script>
</body>
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_element_queryselector_class by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:20 GMT -->
</html>
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