JSFiddle - React, Tailwind, and code Playground

JavaScript

function clone(object) {
    var clone = new object.constructor;

    for (property in object) {
        clone[property] = object[property];
    }

    return clone;
}

var a = { x: 1, y: 2, z: [1, 2, 3] };
var b = clone(a);
b.x = 10;
console.log(a.x);

b.z.push(4);
console.log(a.z);

var c = new Date(2014, 1, 1);
var d = clone(c);
d.setFullYear(2015);
console.log(c.getFullYear());