JSFiddle - React, Tailwind, and code Playground

JavaScript

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() {
            if (typeof Car === "function") {
                alert("Car class loaded!");
            } else {
                 alert("Car class not loaded!");
            }
        }

        head.append(script);