(migration build) WATCH_ARRAY in @vue/compat is triggered by RouterView

[daniilskr]

Version

3.2.30

Reproduction link

github.com

Steps to reproduce

You can either clone repository(Link to minimal reproduction) or create app with vue-router and @vue/compat

What is expected?

"[Vue warn]: (deprecation WATCH_ARRAY)..." should be triggered only when the user code is "watching" an array in some of his components with the "watch" option

What is actually happening?

"[Vue warn]: (deprecation WATCH_ARRAY)" is triggered by the RouterView when user does not watch any arrays in his components with the "watch" option

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I ran into this bug during migration from vue2 to vue3

[LinusBorg]

@posva We likely should add a compatConfig: { MODE: 3 } to RouterView and RouterLink to keep any such compar warnings from popping up for them - the router's own components don't need to run in compat mode, anyway.

[posva]

That's true. It would be nice if they could be set without adding anything for v3 users.
Right now users can directly add the options while using @vue/compat:

import { RouterView, RouterLink } from 'vue-router'

RouterView.compatConfig = { MODE: 3 }
RouterLink.compatConfig = { MODE: 3 }

It would be better if it worked out of the box though