Example: copy 2x2 empty cells from Excel Online to DGXL in this Codepen demo: https://codepen.io/datagridxl/pen/mdXxXPR. It doesn't work in DGXL; it works in HoT though.
When pasting the values in the "Check Formatting" textarea, the copied string is ""
. It seems that HoT reads other data than the copied string. Perhaps the clipboard object holds more detailed Excel info, as they cannot possibly interpret ""
as meaning 2x2 empty cells.