<!DOCTYPE html>
<html>
<head>
<style>
div {
border: 1px solid black;
margin: 15px;
}
</style>
</head>
<body>
<p>Click the button to get the tag name of the DIV's last child element.</p>
<div id="myDIV">
<p>A P element - First child in div</p>
<span>A Span element - Last child in div</span>
</div>
<button onclick="myFunction()">Try it</button>
<p><strong>Note:</strong> The lastElementChild property is not supported in IE8 and earlier versions.</p>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.getElementById("myDIV").lastElementChild.tagName;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
</html>