JSFiddle - React, Tailwind, and code Playground

HTML

<div id='aoeu'>
    Ammonium NH%4^+
    Copper(I) Cu^+
    Gold(I) Au^+
    Rubidium Rb^+
    Acetone CH%3COCH%3
    Glycerin C%3H%5(OH)%3
</div>

JavaScript

var el = document.getElementById("aoeu"),
    content = el.innerHTML.replace(/  |^\s+|\s+$/g,""),
    lines = content.split("\n");

console.dir(lines);