<!DOCTYPE html>
<html lang="en-US">
<body>
<p>Click on the button to display all attributes and its value used in button tag.</p>
<button id="myBtn" onclick="myFunction()">Click Me</button>
<p id="point"></p>
<script>
var x = document.getElementById("point");
var elem = document.getElementById("myBtn");
var len = elem.attributes.length
var txt = "";
function myFunction(){
for(var i=0; i<len; i++)
txt += elem.attributes[i].name +" = "+ elem.attributes[i].value +"<br>";
x.innerHTML = txt;
}
</script> </body>
</html>