router-view is functional component which should not be used with keep-alive

[yuwu9145]

Version

3.5.3

Reproduction link

github.com

Steps to reproduce

According to keepAlive official doc

keep-alive does not work with functional components because they do not have instances to be cached.

However, according to router-view doc, RounterView is a functional component.

this results in issue which can be reproduced in vuejs/core#5207

What is expected?

RounterView should work correctly with keep-alive

What is actually happening?

RounterView does not work correctly with keep-alive and two official documents are contradictive.

[LinusBorg]

1. You are in the wrong repository. VueRouter 4 lives art https://github/vuejs/router
2. You have read the wrong docs, which until very soon still live at next.router.vuejs.org
3. The quote from the docs talks about KeepAlive wrapping a functional component directly. It does not mean any nested child

Please open a new issue in https://github.com/vuejs/router if you still think this needs to be adressed in the router.