My initial purpose is to make transition in vue-router/examples/transitions reusable.

Before change codes, transition works as a's expected:

1. vue-router@2.1.1 + vue@2.1.6 👍
   Expected https://jsfiddle.net/feipigzi/uqotvzft/3/

Click /parent and /parent/foo , make slide left or right transition.

After make resuable, unexpected:

2. vue-router@2.1.1 + vue@2.1.6 (resuable transition) 👎
   Unexpected: https://jsfiddle.net/feipigzi/uqotvzft/

And I try to use older version vue.js, work as expected

3. vue-router@2.1.1 + vue@2.0.0-rc.4 (resuable transition) 👍
   Expected: https://jsfiddle.net/feipigzi/uqotvzft/2/

Increase version, unexpected again:

4. vue-router@2.1.1 + vue@2.0.0-rc.5 (resuable transition) 👎
   Unexpected: https://jsfiddle.net/feipigzi/uqotvzft/1