<html>
<body>
<p id="demo">Click the button get the node value of the button element</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction()
{
var c=document.getElementsByTagName("BUTTON")[0];
var x=document.getElementById("demo");
x.innerHTML=c.childNodes[0].nodeValue;
}
</script>
<p><strong>Note:</strong> Text inside elements are considered to be text nodes, so we return the note value of the button element's first child (childNodes[0]).</p>
</body>
</html>