JSFiddle - React, Tailwind, and code Playground

HTML

<div id="console-log"></div>

JavaScript

class items {
  constructor() {
    this._item = [ 0, 1, 2, 3, 4, 5 ];

    return new Proxy(this, {
      get(target, name) {
        if (name[0] === '$') return target.getItem(name.substr(1));
        return target[name];
      }
    });
  }
  getItem(id) {
    return this._item[id];
  }

  getItem3() {
    return this.$3;
  }
}

const myItems = new items(); // [1]
const item3 = myItems.getItem3();

console.log(item3);