CellContent When Cell is Blank

Questions
1

I’m trying to write a condition for when a cell in a table is blank. Since there is not .isBlank in tables, I wanted to write:

when table1.cellContent(1,1)=

But what doed it equal when there’s nothing in the cell?

2

There’s an isBlank

when isBlank(table1.cellContent(1,1) )...
3

thanks, must have missed it in the documentation.

4

It’s in the Functions section. There’s also isDefined and isUndefined.