What is the correct way to extend object preserving prototype

Issue

I want to have a shallow copy of an object but preserve its prototype. angular.extend seems to lose prototype when extending object. How can I extend an object so that the new object has the same prototype as original?

Solution

It seems the only way to do so is to additionally use setPrototypeOf like this:

var copy = angular.extend(original);
Object.setPrototypeOf(copy, original.getPrototypeOf(original))

Also, extend drops getters and setters defined through Object.defineProperty on an original.

Answered By - Max Koretskyi