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docs.sheetjs.com/docz/docs/09-constellation/01-ssf.md
SheetJS 4b984058b5 ssf
2023-10-24 02:36:21 -04:00

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SSF Number Formatter

As explained in "Number Formats", modern spreadsheet file formats separate "content" from "presentation". Instead of storing a formatted value like $3.50, applications will store the underlying value (3.50) and the number format ($0.00). Parsers are expected to render values.

The SheetJS SSF ("SpreadSheet Formatter") library formats numbers according to the number formatting rules defined in Excel and other spreadsheet software1

A version of the library ships with the main file processing library. It is deeply integrated in SheetJS CE API functions including read2, write3, and sheet_to_json4.

The library is also available for standalone use on the SheetJS CDN5.

The source code and project documentation is hosted on the SheetJS git server at https://git.sheetjs.com/sheetjs/sheetjs/src/branch/master/packages/ssf

  1. The number formatting rules are sketched in ECMA-376. A rough grammar is defined in the MS-XLS specification. ↩︎

  2. See read in "Reading Files" ↩︎

  3. See write in "Writing Files" ↩︎

  4. See sheet_to_json in "Utilities" ↩︎

  5. See https://cdn.sheetjs.com/ssf/ for more details. ↩︎