JSFiddle - React, Tailwind, and code Playground

HTML

<div id="TestID">This is a single division</div>

CSS

#TestID{
    background:green;
}

JavaScript

// make a function and pass part of the statement as argument
function ExampleFunction( argument ) {
    document.getElementById('TestID').style[argument] = '#f00';
}

// then later onload
ExampleFunction( 'background' );