JSFiddle - React, Tailwind, and code Playground

JavaScript

function sleep(ms) {
    var start = new Date(), now;
    do {
        now = new Date();
    }
    while(now - start < ms);
}


var body = $("body");

body.append("<p id='a1'>Hello</p>");
console.log("searching id=a1, elements matched: " + $("#a1").length);
sleep(5000);
body.append("<p id='a2'>World</p>");
console.log("searching id=a2, elements matched: " + $("#a2").length);