Vega-Lite: More Complex Sort Functions

Question

https://vega.github.io/vega-lite/docs/sort.html

Is there a way to pass in a more complex sort to a vega lite chart? For example could I pass something like a javascript function in to work as a comparator?

Answer 1

As far as I know, it's not possible to directly pass in a custom sort function directly.

However, you could calculate a custom field using the calculate transformation to create a new field with the expression language (which is a subset of Javascript) , then use that field to perform your sort.

If you have a custom javascript function that you'd like to call from inside the expression language, you can register it using the Vega extension API, and then use it in your calculate transform.