JSFiddle - React, Tailwind, and code Playground

by btipling

JavaScript

var i, obj = {
    "0": 0,
    1: 1,
};

Object.defineProperty(obj, 2, {
    value: 2,
    enumerable: true,
});
Object.defineProperty(obj, "3", {
    value: 3,
    enumerable: true,
});

for (i in obj) {
    console.log(typeof i);
}