Better support/integration with Mapbox GL Style Spec

[KyleNixon3]

Hi,

I'm wondering whether in the near future support will be improved for styling basemaps created with proprietary, or non-ESRI, data. We are attempting to style our own data as basemaps but are running into a lot of missing holes in support for the Mapbox GL style spec.

Will there be better integration and support for what the style specification is for Mapbox tiles?

[HoustonCo]

We are a little bit behind you in this process (trying to inject our vectors into esri's base-map vectors - successful in Pro not in ArcGIS online). But, has ESRI documented these holes or could you provide some specific examples where the style spec is lacking? 

[bagage]

Hi!  It is still lacking. Or may I confused.  Is it using Mapbox under the hood? Cause there are multiple mapbox specification not working. Especially expressions, and styles  like fill and symbol-sort-key.