JSFiddle - React, Tailwind, and code Playground

by b00t

HTML

<button id="jacksparrow">1</button>
<button id="tedtalks">2</button>
<button id="derp:1:uniquenamehere">3</button>
<button id="iamlegendz">4</button>

CSS

button {
    width: 25px;
    height: 25px;
}

JavaScript

function getButton (buttonid) {
    var buttons = document.getElementsByTagName('button');
	for (var i = 0; i < buttons.length; i += 1) {
		if (buttons[i].id.slice(buttons[i].id.length - buttonid.length) === buttonid) {
			return buttons[i];
		}
	}
	return null;
}

getButton('uniquenamehere').style.backgroundColor = "#0f0";