Expose a way to know which tab is active about elm-bootstrap HOT 6 CLOSED

Are you not keeping state of tabState in the model?
Based on the instructions, I placed tabState in the model and I init as Tab.initialState. You can check the Msg when the user clicks on a tab:

TabMsg State …
▾0 = {
activeTab = Just "tabItem2"
visibility = Showing
}

from elm-bootstrap.

"Are you not keeping state of tabState in the model?"

Yes, I am. But can I access State record on the case/of? In the Elm Bootstrap package the custom type is private.

from elm-bootstrap.

one workaround might be to use the Browser.navigation module, the chosen tab could be sent as a url hash (nice for deep linking as well). Then you can pick up the active tab and just in time render the view (and fetch needed data, probably with your own custom state handling for pending/success/error states for the remote request(s) etc).

from elm-bootstrap.

Indeed, this is a opaque type (https://github.com/rundis/elm-bootstrap/blob/master/src/Bootstrap/Tab.elm#L84)
So unfortunately I don't know how one can access these values (I'm somewhat new to Elm). From what I can tell this pattern is meant, as you say, to be private in order to not break apps with future changes, which in this instance kind of sucks if you ask me since it seems like it would be a very useful thing and would support the most basic and standard Elm pattern listen to Msg in update -> update model -> (optional) trigger Cmd.

Of course @rundis knows best (he's the author after all). His workaround should work and it's probably a more generic and robust way to do it, backwards compatible that won't break if any internal changes occur. Thanks for the learning experience, I hope this also helps others.
(This is as far as I got doing the case...of approach)

from elm-bootstrap.

On my side I've solved the issue by copying and edit the original code like I've written in the first message so it is OK if things stay the way they are.

My intent was to understand if there was a will to expose "current tab" information in a subsequent release.

from elm-bootstrap.

It's a bummer this was closed because I'm facing the same issue, where I'd like to fire a Cmd when changing to a specific tab, and since Tab.State is opaque, there isn't a way to query the activeState inside it.

from elm-bootstrap.