JSFiddle - React, Tailwind, and code Playground

JavaScript

var dynamic = [];

dynamic.push = function (id, value) {
    if (!this[id]) {
        this[id] = [];
    }

    this[id].push(value);
}

dynamic.push(3, 2);
dynamic.push(3, 3);
dynamic.push(5, 5);

console.log(dynamic);