Getting the property set by the `set` method through a function is not reactive

[cscxj]

In the template, I obtained the newly set property of the reactive object through a function, and the view was not reactive, but directly taking this value was reactive. I used Vue 3 to implement the same logic, and it was reactive. Vue 2 example Vue 3 example

[jacekkarczmarczyk]

https://github.com/vuejs/vue/issues/12774#issuecomment-1274141924

[cscxj]

vuejs/vue#12774 (comment)

Thanks.