JSFiddle - React, Tailwind, and code Playground

by John Wick

HTML

<div id="choice"></div>

<div id="hidden">

</div>

CSS

#hidden {display:none}

JavaScript

function isPowerOfTwo(n){
  var x = Math.pow(2, Math.round(Math.log(n) / Math.log(2)));
  return x == n;
}


document.getElementById('choice').innerHTML = isPowerOfTwo(256);