docs.sheetjs.com/docz/docs/07-csf/03-sheet.md

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Sheet Objects

Excel supports 4 different types of "sheets":

• "worksheets": normal sheets
• "chartsheets": full-tab charts
• "macrosheets": legacy (pre-VBA) macros
• "dialogsheets": legacy (pre-VBA) dialog windows

Generic Sheet Object

Generic sheets are plain JavaScript objects. Each key that does not start with ! is an A1-style address whose corresponding value is a cell object.

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

Sheet Properties

Each key starts with !. The properties are accessible as sheet[key].

• sheet['!ref']: A-1 based range representing the sheet 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 sheet by hand, cells outside of the range are not included

  Functions that handle sheets 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 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']

• sheet['!margins']: Object representing the page margins. The default values follow Excel's "normal" preset. Excel also has a "wide" and a "narrow" preset but they are stored as raw measurements. The main properties are listed below:

Page margin details (click to show)

key	description	"normal"	"wide"	"narrow"
left	left margin (inches)	0.7	1.0	0.25
right	right margin (inches)	0.7	1.0	0.25
top	top margin (inches)	0.75	1.0	0.75
bottom	bottom margin (inches)	0.75	1.0	0.75
header	header margin (inches)	0.3	0.5	0.3
footer	footer margin (inches)	0.3	0.5	0.3

/* Set worksheet sheet to "normal" */
ws["!margins"]={left:0.7, right:0.7, top:0.75,bottom:0.75,header:0.3,footer:0.3}
/* Set worksheet sheet to "wide" */
ws["!margins"]={left:1.0, right:1.0, top:1.0, bottom:1.0, header:0.5,footer:0.5}
/* Set worksheet sheet to "narrow" */
ws["!margins"]={left:0.25,right:0.25,top:0.75,bottom:0.75,header:0.3,footer:0.3}

Worksheet Object

In addition to the aforementioned sheet keys, worksheets also add:

• 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['!rows']: array of row properties objects as explained later in the docs. Each row object encodes properties including row height and visibility.

• ws['!merges']: array of range objects corresponding to the merged cells in the worksheet. Plain text formats do not support 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['!outline']: configure how outlines should behave. Options default to the default settings in Excel 2019:

key	Excel feature	default
above	Disable "Summary rows below detail"	false
left	Disable "Summary rows to the right of detail"	false

• ws['!protect']: object of write sheet protection properties. The password key specifies the password for formats that support password-protected sheets (XLSX/XLSB/XLS). The writer uses the XOR obfuscation method. The following keys control the sheet protection -- set to false to enable a feature when sheet is locked or set to true to disable a feature:

Worksheet Protection Details (click to show)

key	feature (true=disabled / false=enabled)	default
selectLockedCells	Select locked cells	enabled
selectUnlockedCells	Select unlocked cells	enabled
formatCells	Format cells	disabled
formatColumns	Format columns	disabled
formatRows	Format rows	disabled
insertColumns	Insert columns	disabled
insertRows	Insert rows	disabled
insertHyperlinks	Insert hyperlinks	disabled
deleteColumns	Delete columns	disabled
deleteRows	Delete rows	disabled
sort	Sort	disabled
autoFilter	Filter	disabled
pivotTables	Use PivotTable reports	disabled
objects	Edit objects	enabled
scenarios	Edit scenarios	enabled

• ws['!autofilter']: AutoFilter object following the schema:

type AutoFilter = {
  ref:string; // A-1 based range representing the AutoFilter table range
}

Other Sheet Types

Chartsheet Object

Chartsheets are represented as standard sheets. They are distinguished with the !type property set to "chart".

The underlying data and !ref refer to the cached data in the chartsheet. The first row of the chartsheet is the underlying header.

Macrosheet Object

Macrosheets are represented as standard sheets. They are distinguished with the !type property set to "macro".

Dialogsheet Object

Dialogsheets are represented as standard sheets. They are distinguished with the !type property set to "dialog".