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<!DOCTYPE html>
<html>
<body>
<h1>The Element Object</h1>
<h2>The querySelectorAll() Method</h2>
<div id="myDIV" style="border:1px solid black;padding:8px;">
  <h2 class="example">A Heading</h2>
  <p class="example">A paragraph.</p> 
  <p class="example">A paragraph.</p> 
</div>
<p>How many elements with class "example" in "myDIV"?</p>
<p id="demo"></p>
<script>
const element = document.getElementById("myDIV");
const list = element.querySelectorAll(".example");
document.getElementById("demo").innerHTML = list.length;
</script>
</body>
</html>