validator
key. They should be async functions that accept a 2D array of strings as their only argument. This corresponds to the array of all inputs for all rows + columns sent to destination. fields
array as given in the uploader snippet found on the uploader description page. As a reminder, fields
array is ordered and should not be changed from the ordering given in the snippet.true
means that the row is valid, false
means that it’s invalid with no error message, and `{ errorMessage: "custom error msg" }` is how you can provide custom error messages. They will be shown to the user when they over over the cell with error.