<!DOCTYPE html>
<html>
<head>
<style>
.example {
color: red;
padding: 5px;
width: 150px;
font-size: 15px;
}
</style>
</head>
<body>
<p>Click the button to get all attribute names of the button element.</p>
<button id="myBtn" onclick="myFunction()" class="example">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var txt = "";
var x = document.getElementById("myBtn").attributes;
var i;
for (i = 0; i < x.length; i++) {
txt += "Attribute name: " + x[i].name + "<br>";
}
document.getElementById("demo").innerHTML = txt;
}
</script>
</body>
</html>