JSFiddle - React, Tailwind, and code Playground

JavaScript

var Obj = function () {
        this.hold = {};
    };
    
    Obj.prototype._ = function (key) {
        //implement here;
        return this;
    };
    
    var registry = new Obj();
    
    var test = registry._('key1')._('key2')._('key3');

console.log(test);