JSFiddle - React, Tailwind, and code Playground

JavaScript

function MyDynamicClass() {

    this.init = function() {
        console.log("[MyDynamicClass]");
    };
}

function SomeClass(root) {

    var _window = root;
    this.init = function() {
        var classInstance = new _window["MyDynamicClass"]();
        classInstance.init();
    };
}

var someClass = new SomeClass(window);
someClass.init();