I would like to know how to do this too. It’s come up before as well, but no solution: Deselect cell in data table
I tried updating the active_cell property, but that didn’t work. I did a workaround by having a button to hide/show selections which updated style_data_conditional, but it’s kinda lame.
It would be great if you could click on a cell/row/column to toggle active or selected.