Read a cell as a date.
Only a real Date is accepted. Parsing a string into a calendar is the kind of confident guess this adapter refuses: a date-part column's text is "Q3 2021" as often as it is an ISO stamp, and a wrong parse would select the wrong marks in the viz.
Date
"Q3 2021"
The cell, or undefined for an unmatched column.
undefined
The date, or null when the cell is a gap or is not a date.
null
Read a cell as a date.
Only a real
Dateis accepted. Parsing a string into a calendar is the kind of confident guess this adapter refuses: a date-part column's text is"Q3 2021"as often as it is an ISO stamp, and a wrong parse would select the wrong marks in the viz.