Extend does not copy property getters

[arobinson]

jQuery.extend copies property getter return values, not their code.

To reproduce:

var a = { get test() { return "hi"; }};
var b = $.extend({}, a);
// Correctly prints out the function:
console.log(a.__lookupGetter__("test"));
// Incorrectly is undefined:
console.log(b.__lookupGetter__("test"));

[snover]

Not all browsers supported by jQuery support ES5. Additionally, I doubt so many people are using getter/setters at this point that it is worth adding to core. Feel free to make your own $.extend that uses getOwnPropertyDescriptor to do this, though.

[anonymous]

Worth reopening? Getters and setters are much more useful now than 3 years ago.

[dmethvin]

This is not in scope for the applications of $.extend. Create your own or use libraries like underscore/lodash.