JSFiddle - React, Tailwind, and code Playground

JavaScript

var x = {};
x[0] = 1;
x[1] = 2;
x[2] = 3;
x.someProperty = 'Foo';
console.log(x);

var copy = {}
$.each(x,function(i,e){
   copy[i] = e;
});

console.log(copy);