<!DOCTYPE html>
<html>
<body>
<ol id="myList">
<li>Tea</li>
<li>Milk</li>
<li>Water</li>
</ol>
<p>Click the button to create a LI element.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.createElement("LI");
var t = document.createTextNode("Coffee");
x.appendChild(t);
document.getElementById("myList").appendChild(x);
}
</script>
</body>
</html>