Set class on grid cell when loading json

Hello, I’m looking to assign a class to a cell in my json while loading the grid. For example I might want to make one cell red and the next green depending on the data (not what is being displayed directly I could use mark for that). So say I want a cell to display something but be a different color based on other data.

There is no possibility to assign a cell css in the grid data.
I can only suggest you to use the mark() property or the addCellCss() method: