JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<head>
</head>
<body>
<input type="button" value="button">
<input type="button" value="button">
<input type="button" value="button">
</body>
</html>

JavaScript

window.onclick = e => {
	if(e.target.tagName=="INPUT"){
		submitb = document.querySelectorAll("input");
		for (var i=0; i < submitb.length; i++) {
			submitb[i].style.background="#aaa";
		}
		e.target.style.background="#0f0";
	}
}