I’ve created a number of validations for columns within the grid I’m working on. When trying to test the validations, I periodically get the following error in the console:
Uncaught TypeError: Property ‘isnull’ of object # is not a function dhtmlxgrid_validation.js:12
This happens when I clear out a cell and move from one cell to another, even though part of my validation for each cell is that the cell in not empty. So in this case, I expect a validation error, but I’m not sure why I’m getting the TypeError mentioned above.