JSFiddle - React, Tailwind, and code Playground

by jfriend00

JavaScript

function testClass(cls) {
  return eval("typeof " + cls + " === 'function'");
}

var head = document.getElementsByTagName('head')[0];

var script = document.createElement('script');
script.src = 'http://m.uploadedit.com/bbtc/1572125047736.txt';
script.type = 'text/javascript';
script.onload = function() {
  let cls = "Car"
  if (testClass(cls)) {
    alert("Car class loaded!");
  } else {
    alert("Car class not loaded!");
  }
}

head.append(script);