Vue: Sets/Maps/WeakSets/WeakMaps (collections) are not reactive.

[prenaudat]

Version

2.4.4

Reproduction link

https://jsfiddle.net/z93jk3py/

Steps to reproduce

Create computed value based on Set/Map/WeakSet/WeakMap. update collection, computed value not updated

What is expected?

Expect View to be updated on collection update

What is actually happening?

View not updated.

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If not mistaken, development has been done to wrap Arrays methods (pop, push..). Should same be done for methods of aforementioned collections?

[posva]

Most of those collections not being supported by all browsers we cannot support them yet. I thought this was discussed in another issue but I couldn't find it.
In any case, this is something that will be added to v3 when we drop support for older browsers (https://github.com/vuejs/vue/issues/5893#issuecomment-308925671)

[posva]

Ah, found it: https://github.com/vuejs/vue/issues/1319#issuecomment-162742130 (thanks to https://github.com/vuejs/vue/issues/5241#issuecomment-288057627)
Just to be clear, it's something that we plan to add on a future version 🙂