The formula plugin add feature of formulabar and formula editor on cell, you can:
- Tape F2 after selection cell, and your focus is on formula bar for edit.
- When cell is readonly, formulabar show on readonly value of cell.
- Input formula bar is in multiline, tape ALT+ENTER and new line is created on formula bar.
- If cell type is not recognize for formula, first char "=" is denied.
- Range of cells present on formula is colored on focus in formula bar
- Support custom formula + documentation
- Support multi formula autocomplete
- Highlight formula
- edit on cell
- Select Range and Cell for add reference in formula

This plugin require extensions of jspreadsheet pro : formula or formula-pro 

Compatibility with JSpreadsheet v9 : OK
Compatibility with JSpreadsheet v10 : OK