The Set object accessor size

[iliakut]

Version

3.1.1

Reproduction link

https://codepen.io/iliakut/pen/PooPPLm

Steps to reproduce

let Vuex see changes in Set object accessor size

What is expected?

getter return size of Set object

What is actually happening?

getter can't return size of Set object

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I have a getter in vuex that returns state.setObject.size, but getter does't return actual size;
example: getter: state => state.setObject.size
I use setObject.add() and setObject.delete() methods to change setObject.
Are there any ways to read setObject.size? Exclude component computed cache: false.

[ktsn]

Set is not supported in current Vue.js reactivity.
#961
vuejs/vue#1319
vuejs/vue#2410