JSFiddle - React, Tailwind, and code Playground

HTML

<pre id="o"></pre>

JavaScript

h=i=>(i>15?h(i>>4):"")+"0123456789abcdef"[i%16]


for (var i = 0; i < 256; i++) {
	document.getElementById("o").innerHTML += i + " -> " + h(i) + "\n";
}