Reproduction
https://codesandbox.io/s/cpoisd
Steps to reproduce the bug
Call this.$route.query, this.$route.params in any of these places.
Expected behavior
Identified normally and with code complements.
Actual behavior
It is marked as "Weak Warning: Unresolved variable", this.$route and this.$router will not have any code completion options.

Additional information
I think it may be a documentation issue.