Version

4.1.6

Reproduction link

codesandbox.io

Steps to reproduce

1. Open linked CodeSandbox
2. Observe Console
3. Click on "Home - A", and then on "Home - B"

What is expected?

Should not log at all, because the component has receives no props and does not depend on any reactive data from the router.

So when a child route changes, it should not update.

What is actually happening?

Home.vue console.logs 3 times, meaning it re-rendered multiple times.

I'm pretty sure the reason for that is that router-view needs to re-render multiple times, and each time, a new onVNodeUnmounted callback is added to the VieComponent vnode's props object here:

So from the POV of Vue, the props changed. So it will run an update cycle of the router view.