xlsx-export-lib

About this fork

• this is a continuation of the the library xlsx-style (https://www.npmjs.com/package/xlsx-style)

Supported formats

Supported read formats:

• Excel 2007+ XML Formats (XLSX/XLSM)
• Excel 2007+ Binary Format (XLSB)
• Excel 2003-2004 XML Format (XML "SpreadsheetML")
• Excel 97-2004 (XLS BIFF8)
• Excel 5.0/95 (XLS BIFF5)
• OpenDocument Spreadsheet (ODS)

Supported write formats:

• XLSX
• CSV (and general DSV)
• JSON and JS objects (various styles)

Installation

With npm:

npm install xlsx-export-lib --save

Interface

XLSX is the exposed variable in the browser and the exported node variable

XLSX.version is the version of the library (added by the build script).

XLSX.SSF is an embedded version of the format library.

Parsing functions

XLSX.read(data, read_opts) attempts to parse data.

XLSX.readFile(filename, read_opts) attempts to read filename and parse.

Writing functions

XLSX.write(wb, write_opts) attempts to write the workbook wb

XLSX.writeFile(wb, filename, write_opts) attempts to write wb to filename

Utilities

Utilities are available in the XLSX.utils object:

Exporting:

• sheet_to_json converts a workbook object to an array of JSON objects.
• sheet_to_csv generates delimiter-separated-values output
• sheet_to_formulae generates a list of the formulae (with value fallbacks)

Cell and cell address manipulation:

• format_cell generates the text value for a cell (using number formats)
• {en,de}code_{row,col} convert between 0-indexed rows/cols and A1 forms.
• {en,de}code_cell converts cell addresses
• {en,de}code_range converts cell ranges

Workbook / Worksheet / Cell Object Description

js-xlsx conforms to the Common Spreadsheet Format (CSF):

General Structures

Cell address objects are stored as {c:C, r:R} where C and R are 0-indexed column and row numbers, respectively. For example, the cell address B5 is represented by the object {c:1, r:4}.

Cell range objects are stored as {s:S, e:E} where S is the first cell and E is the last cell in the range. The ranges are inclusive. For example, the range A3:B7 is represented by the object {s:{c:0, r:2}, e:{c:1, r:6}}. Utils use the following pattern to walk each of the cells in a range:

for(var R = range.s.r; R <= range.e.r; ++R) {
  for(var C = range.s.c; C <= range.e.c; ++C) {
    var cell_address = {c:C, r:R};
  }
}

Cell Object

Key	Description
v	raw value (see Data Types section for more info)
w	formatted text (if applicable)
t	cell type: b Boolean, n Number, e error, s String, d Date
f	cell formula (if applicable)
r	rich text encoding (if applicable)
h	HTML rendering of the rich text (if applicable)
c	comments associated with the cell **
z	number format string associated with the cell (if requested)
l	cell hyperlink object (.Target holds link, .tooltip is tooltip)
s	the style/theme of the cell (if applicable)

Built-in export utilities (such as the CSV exporter) will use the w text if it is available. To change a value, be sure to delete cell.w (or set it to undefined) before attempting to export. The utilities will regenerate the w text from the number format (cell.z) and the raw value if possible.

Note: The .z attribute is now deprecated. Use the .s attribute to specify cell styles including number formats. To specify a number format, use s.numFmt, e.g. {v: 42145.822, s: { numFmt: "m/dd/yy"}} described below.

Data Types

The raw value is stored in the v field, interpreted based on the t field.

Type b is the Boolean type. v is interpreted according to JS truth tables

Type e is the Error type. v holds the number and w holds the common name:

Value	Error Meaning
0x00	#NULL!
0x07	#DIV/0!
0x0F	#VALUE!
0x17	#REF!
0x1D	#NAME?
0x24	#NUM!
0x2A	#N/A
0x2B	#GETTING_DATA

Type n is the Number type. This includes all forms of data that Excel stores as numbers, such as dates/times and Boolean fields. Excel exclusively uses data that can be fit in an IEEE754 floating point number, just like JS Number, so the v field holds the raw number. The w field holds formatted text.

Type d is the Date type, generated only when the option cellDates is passed. Since JSON does not have a natural Date type, parsers are generally expected to store ISO 8601 Date strings like you would get from date.toISOString(). On the other hand, writers and exporters should be able to handle date strings and JS Date objects. Note that Excel disregards the timezone modifier and treats all dates in the local timezone. js-xlsx does not correct for this error.

Type s is the String type. v should be explicitly stored as a string to avoid possible confusion.

Worksheet Object

Each key that does not start with ! maps to a cell (using A-1 notation)

worksheet[address] returns the cell object for the specified address.

Special worksheet keys (accessible as worksheet[key], each starting with !):

• ws['!ref']: A-1 based range representing the worksheet range. Functions that work with sheets should use this parameter to determine the range. Cells that are assigned outside of the range are not processed. In particular, when writing a worksheet by hand, be sure to update the range. For a longer discussion, see http://git.io/KIaNKQ

  Functions that handle worksheets should test for the presence of !ref field. If the !ref is omitted or is not a valid range, functions are free to treat the sheet as empty or attempt to guess the range. The standard utilities that ship with this library treat sheets as empty (for example, the CSV output is an empty string).

  When reading a worksheet with the sheetRows property set, the ref parameter will use the restricted range. The original range is set at ws['!fullref']

• ws['!cols']: array of column properties objects. Column widths are actually stored in files in a normalized manner, measured in terms of the "Maximum Digit Width" (the largest width of the rendered digits 0-9, in pixels). When parsed, the column objects store the pixel width in the wpx field, character width in the wch field, and the maximum digit width in the MDW field.

• ws['!merges']: array of range objects corresponding to the merged cells in the worksheet. Plaintext utilities are unaware of merge cells. CSV export will write all cells in the merge range if they exist, so be sure that only the first cell (upper-left) in the range is set.

• ws['!printHeader']: array of row indices for repeating row headers on print, e.g. [1:1] to repeat just the first row.

The following properties are currently used when generating an XLSX file, but not yet parsed:

• ws['!rowBreaks']: array of row break points, e.g. [16,32]
• ws['!colBreaks']: array of col break points, e.g. [8,16]
• ws['!pageSetup']: `{scale: '100', orientation: 'portrait'||'landscape'}
• ws['!printHeader']: array of first and last row indexes for repeat header on printing, e.g. [1,1] to repeat just first row
• ws['!freeze']: string cell reference for breakpoint, e.g. the following will freeze the first row and first column: { xSplit: "1", ySplit: "1", topLeftCell: "B2", activePane: "bottomRight", state: "frozen" }

Workbook Object

workbook.SheetNames is an ordered list of the sheets in the workbook

wb.Sheets[sheetname] returns an object representing the worksheet.

wb.Props is an object storing the standard properties. The following properties are currently used when generating an XLSX file, but not yet parsed: - title - subject - description - keywords - creator

wb.Custprops stores custom properties. Since the XLS standard properties deviate from the XLSX standard, XLS parsing stores core properties in both places. .

Parsing Options

The exported read and readFile functions accept an options argument:

Option Name	Default	Description
cellFormula	true	Save formulae to the .f field **
cellHTML	true	Parse rich text and save HTML to the .h field
cellNF	false	Save number format string to the .z field
cellStyles	false	Save style/theme info to the .s field
cellDates	false	Store dates as type d (default is n) **
sheetStubs	false	Create cell objects for stub cells
sheetRows	0	If >0, read the first sheetRows rows **
bookDeps	false	If true, parse calculation chains
bookFiles	false	If true, add raw files to book object **
bookProps	false	If true, only parse enough to get book metadata **
bookSheets	false	If true, only parse enough to get the sheet names
bookVBA	false	If true, expose vbaProject.bin to vbaraw field **
password	""	If defined and file is encrypted, use password **

• cellFormula option only applies to formats that require extra processing to parse formulae (XLS/XLSB).
• Even if cellNF is false, formatted text will be generated and saved to .w
• In some cases, sheets may be parsed even if bookSheets is false.
• bookSheets and bookProps combine to give both sets of information
• Deps will be an empty object if bookDeps is falsy
• bookFiles behavior depends on file type:
  • keys array (paths in the ZIP) for ZIP-based formats
  • files hash (mapping paths to objects representing the files) for ZIP
  • cfb object for formats using CFB containers
• sheetRows-1 rows will be generated when looking at the JSON object output (since the header row is counted as a row when parsing the data)
• bookVBA merely exposes the raw vba object. It does not parse the data.
• cellDates currently does not convert numerical dates to JS dates.
• Currently only XOR encryption is supported. Unsupported error will be thrown for files employing other encryption methods.

The defaults are enumerated in bits/84_defaults.js

Writing Options

The exported write and writeFile functions accept an options argument:

Option Name	Default	Description
cellDates	false	Store dates as type d (default is n)
bookSST	false	Generate Shared String Table **
bookType	'xlsx'	Type of Workbook ("xlsx" or "xlsm" or "xlsb")
showGridLines	true	Show gridlines on all pages
tabSelected	'1'	Initial tab selected
Props	null	Workbook properties

• bookSST is slower and more memory intensive, but has better compatibility with older versions of iOS Numbers
• bookType = 'xlsb' is stubbed and far from complete
• The raw data is the only thing guaranteed to be saved. Formulae, formatting, and other niceties may not be serialized (pending CSF standardization)
• cellDates only applies to XLSX output and is not guaranteed to work with third-party readers. Excel itself does not usually write cells with type d so non-Excel tools may ignore the data or blow up in the presence of dates.
• showGridLines and tabSelected are currently used when generating an XLSX file but not yet parse.
• Props specifies workbook properties

Cell Styles

Cell styles are specified by a style object that roughly parallels the OpenXML structure. The style object has five top-level attributes: fill, font, numFmt, alignment, and border.

Style Attribute	Sub Attributes	Values
fill	patternType	"solid" or "none"
	fgColor	COLOR_SPEC
	bgColor	COLOR_SPEC
font	name	"Calibri" // default
	sz	"11" // font size in points
	color	COLOR_SPEC
	bold	true or false
	underline	true or false
	italic	true or false
	strike	true or false
	outline	true or false
	shadow	true or false
	vertAlign	true or false
numFmt		"0" // integer index to built in formats, see StyleBuilder.SSF property
		"0.00%" // string matching a built-in format, see StyleBuilder.SSF
		"0.0%" // string specifying a custom format
		"0.00%;\\(0.00%\\);\\-;@" // string specifying a custom format, escaping special characters
		"m/dd/yy" // string a date format using Excel's format notation
alignment	vertical	"bottom" or "center" or "top"
	horizontal	"bottom" or "center" or "top"
	wrapText	true or false
	readingOrder	2 // for right-to-left
	textRotation	Number from 0 to 180 or 255 (default is 0)
		90 is rotated up 90 degrees
		45 is rotated up 45 degrees
		135 is rotated down 45 degrees
		180 is rotated down 180 degrees
		255 is special, aligned vertically
border	top	{ style: BORDER_STYLE, color: COLOR_SPEC }
	bottom	{ style: BORDER_STYLE, color: COLOR_SPEC }
	left	{ style: BORDER_STYLE, color: COLOR_SPEC }
	right	{ style: BORDER_STYLE, color: COLOR_SPEC }
	diagonal	{ style: BORDER_STYLE, color: COLOR_SPEC }
	diagonalUp	true or false
	diagonalDown	true or false

COLOR_SPEC: Colors for fill, font, and border are specified as objects, either:

• { auto: 1} specifying automatic values
• { rgb: "FFFFAA00" } specifying a hex ARGB value
• { theme: "1", tint: "-0.25"} specifying an integer index to a theme color and a tint value (default 0)
• { indexed: 64} default value for fill.bgColor

BORDER_STYLE: Border style is a string value which may take on one of the following values:

• thin
• medium
• thick
• dotted
• hair
• dashed
• mediumDashed
• dashDot
• mediumDashDot
• dashDotDot
• mediumDashDotDot
• slantDashDot

Borders for merged areas are specified for each cell within the merged area. So to apply a box border to a merged area of 3x3 cells, border styles would need to be specified for eight different cells:

• left borders for the three cells on the left,
• right borders for the cells on the right
• top borders for the cells on the top
• bottom borders for the cells on the left