Allow FullscreenControl to specify a source

[carrieVant]

Motivation

There is currently no easy way to display additional features other than just the map in FullscreenControl. We display buttons below our map that allow users to toggle between different maps (ex: street, satellite) and add additional layers to maps that display/filter pins. We would like these to appear in Fullscreen view also.

Design Alternatives

Add a source property to FullscreenControl to specify which DOM element you would like to display in FullscreenControl. This would allow you to display an element that includes other functionality in FullscreenControl (similar to what OpenLayers.js currently supports).

Design

map.addControl(new mapboxgl.FullscreenControl({source: 'map-container'}));

Implementation

map.addControl(new mapboxgl.FullscreenControl({source: 'map-container'}));