SheetJS SSF#
ssf (SpreadSheet Format) is a pure JS library to format data using ECMA-376
spreadsheet format codes (used in popular spreadsheet software packages).
This is the community version. We also offer a pro version with additional
features like international support as well as dedicated support.
Installation#
With npm:
$ npm install ssfIn the browser:
<script src="ssf.js"></script>The browser exposes a variable SSF
When installed globally, npm installs a script ssf that renders the format
string with the given arguments. Running the script with -h displays help.
The script will manipulate module.exports if available . This is not always
desirable. To prevent the behavior, define DO_NOT_EXPORT_SSF.
Usage#
SSF.format(fmt, val, opts) formats val using the format fmt.
If fmt is a string, it will be parsed and evaluated. If fmt is a number,
the actual format will be the corresponding entry in the internal format table.
For a raw numeric format like 000, the value should be passed as a string.
Date arguments are interpreted in the local time of the JS client.
The options argument may contain the following keys:
| Option Name | Default | Description |
|---|---|---|
date1904 | false | Use 1904 date system if true, 1900 system if false |
Manipulating the Internal Format Table#
Binary spreadsheet formats store cell formats in a table and reference by index.
This library uses a global table:
SSF._table is the underlying object, mapping numeric keys to format strings.
SSF.load(fmt:string, idx:?number):number assigns the format to the specified
index and returns the index. If the index is not specified, SSF will search the
space for an available format slot pick an unused slot. For compatibility with
the XLS and XLSB file formats, custom indices should be in the valid ranges5-8, 23-26, 41-44, 63-66, 164-382 (see [MS-XLSB] 2.4.655 BrtFmt)
SSF.get_table() gets the internal format table (number to format mapping).
SSF.load_table(table) sets the internal format table.
Other Utilities#
SSF.parse_date_code(val:number, opts:?any) parses val, returning an object:
type SSFDate = {
D:number; /* number of whole days since relevant epoch, 0 <= D */
y:number; /* integral year portion, epoch_year <= y */
m:number; /* integral month portion, 1 <= m <= 12 */
d:number; /* integral day portion, subject to gregorian YMD constraints */
q:number; /* integral day of week (0=Sunday .. 6=Saturday) 0 <= q <= 6 */
T:number; /* number of seconds since midnight, 0 <= T < 86400 */
H:number; /* integral number of hours since midnight, 0 <= H < 24 */
M:number; /* integral number of minutes since the last hour, 0 <= M < 60 */
S:number; /* integral number of seconds since the last minute, 0 <= S < 60 */
u:number; /* sub-second part of time, 0 <= u < 1 */
}SSF.is_date(fmt:string):boolean returns true if fmt encodes a date format.
Examples#
Related Packages#
ssf-cli is a simple NodeJS command
line tool for formatting numbers.
License#
Please consult the attached LICENSE file for details. All rights not explicitly
granted by the Apache 2.0 license are reserved by the Original Author.
References#
ECMA-376: Office Open XML File FormatsMS-XLS: Excel Binary File Format (.xls) Structure SpecificationMS-XLSB: Excel (.xlsb) Binary File Format
Badges#
