<!DOCTYPE html>
<html>
<head>
<style>
#div-id {
background-color: cornflowerblue;
width: 120px;
height: 20px;
padding: 10px;
}
</style>
</head>
<body>
<div id="div-id"></div>
<script>
var p = document.createElement("p");
var textnode = document.createTextNode("text in p tag");
p.appendChild(textnode);
var div_id = document.getElementById("div-id");
div_id.appendChild(p);
/*
run:
<p>text in p tag</p> as a child of div-id
*/
</script>
</body>
</html>