JSFiddle - React, Tailwind, and code Playground

JavaScript

var instantiate = function (instantiate) {
    return function (constructor, args, prototype) {
        "use strict";

        if (prototype) {
            var proto = constructor.prototype;
            constructor.prototype = prototype;
        }

        var instance = instantiate(constructor, args);
        if (proto) constructor.prototype = proto;
        return instance;
    };
}(Function.prototype.apply.bind(function () {
    var args = Array.prototype.slice.call(arguments);
    var constructor = Function.prototype.bind.apply(this, [null].concat(args));
    return new constructor;
}));

var f = instantiate(F, [], G.prototype);

alert(f instanceof F); // false
alert(f instanceof G); // true

f.alert(); // F

function F() {
    this.alert = function () {
        alert("F");
    };
}

function G() {
    this.alert = function () {
        alert("G");
    };
}