966177 - Show the content of Set and Map

Status: RESOLVED DUPLICATE of bug 862583

(DevTools :: Console, defect)

Description

[Kohei Yoshino]

It would be nice if the Console can show the content of a ES6 Set, Map and WeakMap, like an Object or Array. Currently it only shows the size of the object.

Comment 1

[Victor Porof [:vporof][:vp]]

I guess we could use nondeterministicGetWeakMapKeys for WeakMaps, but I'm entirely sure it's a good idea to do so for our VariablesView. :) Worst case scenario, you could inspect an weak map and some of its contents become gc'd while you're inspecting it.

Comment 2

[Mihai Sucan [:msucan]]

The console does previews for Set and Map, like it does for Arrays/Objects. WeakMaps do not get the special treatment.

Kohei: do you want to see the set/map elements in the object inspector, in the sidebar?

Comment 3

[Girish Sharma [:Optimizer]]

I think, he means the variables view in console (and other places too) and not the pretty output.

Comment 4

[Victor Porof [:vporof][:vp]]

In comment 1 I meant to say "I'm *not* entirely sure". Using nondeterministicGetWeakMapKeys is most likely a bad idea in this particular case.

Comment 5

[Kohei Yoshino]

Yes, I meant so. Set and Map are iterable since Firefox 17, right?

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map

Comment 6

[Kohei Yoshino]

WeakMap is something special, so let's do this for Set and Map first. It would be helpful for developers who are interested in ES6.

Comment 7

[Brandon Benvie [:benvie]]

As Mihai said, the console is already handling this for Maps and Sets. If we're talking about showing this in the VariablesView, we have a bug 862583 for that.

Comment 8

[Kohei Yoshino]

Oh cool, thanks.