observe subclass of Map/Set/WeakMap/WeakSet

[tarnishablec]

What problem does this feature solve?

reactive() can not observe instance from subclass of Map/Set....

What does the proposed API look like?

class SomeMap extends Map{};
const raw= new SomeMap();
const map = reactive(raw);

[LongTengDao]

In fact, I think Proxy solution for Map/Set things is unnecessary, and more expensive, not like for Object/Array.

Maybe we can just import an Map/Set class from Vue, which has reactive methods pre defined, and use that to new/extends. Map/Set things do not have literal style from the begining (not like Object/Array), so our code won't need any changes.

Even, maybe Vue could replace the global Map/Set/... classes before any other code running, things would be more easy.

(BTW: I think maybe the methods part of reactive array solution can also change to directly rewritting on Array.prototype.)

[axetroy]

Use custom Map/Set which is not standard

import ReactiveMap "@vue/map"
import ReactiveSet "@vue/set"

new ReactiveMap() // not new Map()
new ReactiveSet(); // not new Set()

Compromising to standards for performance, I think it’s not good

Maybe the performance of proxy Map/Set is not good, But this is not common after all

Performance optimization should be left to v8 and algorithm