Declarative json custom accessor with js function for complex data driven styling

[nahidpervez]

Hello All,
I can see that simple accessors can be generated with @@=
https://deck.gl/docs/api-reference/json/conversion-reference#functions-and-using-the--prefix

However, does anyone know if we can have custom js function as an accessor? I am trying to do data driven styling on categorical data and simple @@= accessors are not working out for this use case.

Thanks a lot for the help.

[ibgreen]

• If this is in the pre-built Python module, the answer is no, we only support expressions. You'd need to preprocess your data in Python.
• If you are creating a JSONConverter yourself, we still only support expressions, but it might be possible to expose named JS functions to the JSON converter such that they can be called from the expressions.