JSFiddle - React, Tailwind, and code Playground

JavaScript

if (typeof RegionUpdater == "undefined") {
    function RegionUpdater(param1, param2, param3) {
        this.paramA = param1;
        this.paramB = param2;
        this.paramC = param3;
        
        this.update();
    }
    
    RegionUpdater.prototype.update = function() {
        alert("hi there");
    };
}

var ru = new RegionUpdater("1", 2, "3");

function LolUpdater(param1, param2, param3) {
    this.paramA = param1;
    this.paramB = param2;
    this.paramC = param3;
    
    this.update();
}

LolUpdater.prototype.update = function() {
    alert("hi there");
};

var lu = new LolUpdater(1, 2, 3);