added transition status parameter to addEndListener prop

[katerlouis]

like discussed in #519 I passed down the status as a parameter to addEndListener, so when using SwitchTransition with javascript animations for dynamic components (which don't have a show variable) the addEndListener prop can decide which animation to run based on the current status. exiting or entering is being passed down in the following example:

<SwitchTransition mode={ "out-in" }>
  <Transition
    key={ questionObject.id }
    addEndListener={ (node, done, status) =>  {
        if (status === "exiting") {
          // dont know why, but the return seems necessary
          return TweenMax.to(node, 2, { yPercent: 100, onComplete: done })
        }
        if (status === "entering")
          return TweenMax.from(node, 2, { yPercent: 100, clearProps: "all", onComplete: done })
      }
    }
  >
    <Question
      questionObject={ questionObject }
      onChange={ (value) => setAnswer(currentQuestionId, value) }
    />
  </Transition>
</SwitchTransition>

One mistery remains to me, though:
When using it like this, I need to return the TweenMax, or it doesn't animate but jump to the value and still waits for the duration of the animation until the new one enters. The entering animation then really animates.

Any idea on what's happening here?

[katerlouis]

@jquense pi-pa-push :)

[katerlouis]

another push :) – is there a reason you haven't accepted this PR into the latest release from 3 days ago, @jquense?

[eightHundreds]

i need it

[danielhult]

@katerlouis Just curious cause I have the same problem. Did you ever solve this? Either with this library or a different way?