JSFiddle - React, Tailwind, and code Playground

HTML

<div id="girl_develop_it">This is some text!</div>

JavaScript

// Select the girl_develop_it div
var gdi_div = document.getElementById("girl_develop_it");

// Change the size of the text
gdi_div.style.fontSize = "29pt";

// Before we added text:
alert("Before: " + gdi_div.innerHTML);

// Add some new text:
var new_text_node = document.createTextNode(" This is new text! ");
gdi_div.appendChild(new_text_node);

// After we added text:
alert("After: " + gdi_div.innerHTML);