JSFiddle - React, Tailwind, and code Playground

JavaScript

// How much RAM can a website get from your browser?

var stp = 128*(1<<20), A=[];

while(true) {
  try {
    var bf = new Uint8Array(stp);  bf.fill(117);  A.push(bf);
  } catch(e) { break; }
}
alert("Your browser can give us " + (A.length*stp/(1<<30)).toFixed(2) + " GB of RAM");