onRest() should only be called after a transition ends

[bpierre]

At the moment, onRest is called every time the component is rendered.

Here is a demo to compare this behavior with what react-motion does: https://codesandbox.io/s/3v99xomj2p

I think react-spring should follow the behavior of react-motion, where onRest only gets called after a transition ends.

[drcmda]

@bpierre that's curious, yes. Probably because it calls stop before rendering - which it shouldn't anyway since props didn't change. I'll look into this.

[drcmda]

@bpierre it should be fixed now ...

[bpierre]

It is! https://codesandbox.io/s/3v99xomj2p

Thank you 🙏