Object cloning using property descriptors

clone.js

function clone(obj, deep) {
    if (!(obj instanceof Object)) {
        return obj;
    }

    var descriptors = {};

    Object.getOwnPropertyNames(obj).forEach(function(name) {
        var prop = Object.getOwnPropertyDescriptor(obj, name);

        if (deep) {
            prop.value = clone(prop.value);
        }

        descriptors[name] = prop;
    });

    return Object.create(Object.getPrototypeOf(obj), descriptors);
}