<!DOCTYPE html>
<html lang="en-US">
<body>
<div>
<h1>Heading 1</h1>
<p>Paragraph 1</p>
<b>Bold 1</b>
</div>
<p>Click the button to find the number of childNodes inside div tag.</p>
<button onclick="myFunction()">Click Me</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
var y = document.getElementsByTagName("div")[0];
function myFunction(){
x.innerHTML = y.childNodes.length;
}
</script>
<p><strong>Note</strong>: The childNodes include tags and texts.</p> </body>
</html>