JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test-div">TESTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT</div>

CSS

#test-div {
    width:100px;
    background-color:red;
}

JavaScript

alert(document.getElementById("test-div").scrollWidth); //width of entire text.


alert(document.getElementById("test-div").offsetWidth); //width of div