Collapse component does not emit event like bootstrap does.

[Tarrask]

The collapse bootstrap component emits events when changing it state:

Event Type	Description
show.bs.collapse	This event fires immediately when the show instance method is called.
shown.bs.collapse	This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete).
hide.bs.collapse	This event is fired immediately when the hide method has been called.
hidden.bs.collapse	This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete).

Can we add them to the Collapse uiv component?

The dot notation of the bootstrap event doesn't work well with the v-on directive, but we can rename them show-collapse, shown-collapse or just show, shown.

I can make a pull request if interested, but I just want to be sure of the event name to use and that is not something implemented in a different way.

[wxsms]

Hi.

Thanks for your suggestion. It's not implemented yet. Pull requests are welcome!
As for the event names, show / shown / hide / hidden will be fine, I think.