Is there a way to save a drawn line or polygon? I think I've checked most places but can't find a way to do it.

[walkingthehills]

[tryforceful]

Calling draw.getAll(); on the handle for the mapbox-gl-draw instance will fetch the geoJSON of all the drawn elements, and you can use/save that geoJSON from there... Is that what you mean?

[Youllou]

You can, then, show those features by using the draw.add(); function.