Feature parity for "feature-state" expression

[ThibaudM]

Is your feature request related to a problem? Please describe.
feature-state expression is not yet supported for Android, iOS (and macOS) SDKs. See here

Describe the solution you'd like
Feature parity with gl-js implementation

Related issues

• API to set feature state and promoteId missing #185

[louwers]

@ThibaudM What do you envision the API should look like?

[ThibaudM]

@ThibaudM What do you envision the API should look like?

I am not sure to understand your question.

In terms of usage/scenarios, I imagine the same approach as the gl-js one (in order to keep the parity):

• a piece of the code related to feature state
• and samples like this one

In terms of implementation, I really have no idea. Maybe the gl-js approach can be mimicked if there is no huge divergence in this part of the code

[louwers]

Before thinking about the implementation, I think it is good to think about the (platform) APIs.

So specifically: what method(s) should be added to which interface(s) of the iOS and/or Android SDKs? What are the method signature(s)?

[MarkusWendorf]

With #3406 being merged is the support for feature state now complete? Or is there something missing @louwers?

If it is supported the style spec page should be updated https://maplibre.org/maplibre-style-spec/expressions/#feature-state

[louwers]

@MarkusWendorf No it is not complete, there are still no APIs for Android and iOS.

[louwers]

@ThibaudM If you're still interested in this, I just made a PR that implements this. Feedback on the API is welcome. #3858

[ThibaudM]

It's so cool!
I'm still very interested but I currently don't have the time to have a look. I will try my best.

[kylerchin]

Is there the API for android yet?