add to the dom js code example
Example 1: how to add elements in javascript html
//adding 'p' tag to body
var tag = document.createElement("p"); // <p></p>
var text = document.createTextNode("TEST TEXT");
tag.appendChild(text); // <p>TEST TEXT</p>
var element = document.getElementsByTagName("body")[0];
element.appendChild(tag); // <body> <p>TEST TEXT</p> </body>
Example 2: js add more text to element
document.getElementById("p").textContent += " This is the text from javascript.";
<p id ="p">This is the text from HTML.</p>