VLOOKUP with error-checking in LibreOffice

I’ve used this before but it’s been ages and I always forget the syntax:

=IFNA(VLOOKUP(A1, Sheet2.$A$1:$B$1000, 2), "")

LibreOffice requires a dot to separate sheet names from cell references. I believe Excel and Google Sheets uses an exclamation point.

The IFNA tells LibreOffice to use the lookup if found, otherwise use empty string.