Is it possible to export variant types?

Lake

In the inspector, I know you can set the types for elements in an array. Is there a way to export plain variant to the editor such that it's type can also be determined in the editor?

cybereality

No, it doesn't look like you have access to Variant in GDScript (it is basically a wrapper on top of real classes). What are you trying to accomplish? There may be a another way.

Lake

I'm making a tool to help me organize and edit arbitrary data--sort of like a visual JSON, with exported nodepath types used to allow data nodes to reference each other in an auto-updating fashion when nodes are moved.

Each node has a single piece of data whose value is displayed in the editor using a RichTextLabel. A node with children is treated as a key, and one without is treated as a value. Editing the node's name, BBcode text, or data in the inspector updates, the other two variables to match. Moving thing's around in the editor won't break any references because they're handled by the Nodepath type.

Right now, I'm representing the "data" variable as an array of one element so that I can edit it's type in the inspector. Get the nodes layed out nice is a bit janky, but I think I'm going to prefer this workflow to JSON.

TwistedTwigleg

You could override the get_property_list and the set and get functions to show custom data in the inspector, which may be usable as a workaround. I relied on this heavily for Twisted IK 2 to get the IK properties exposed the the editor.

I think being able to export custom classes and variants are coming as part of Godot 4.0, if I recall correctly. I'm not completely sure on what the status for it is currently, but this proposal has quite a few links and references to merged PRs, so I think it's supported in Godot 4.0.