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

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

wb.Workbook stores workbook-level attributes.

File Properties

The various file formats use different internal names for file properties. The workbook Props object normalizes the names:

File Properties (click to show)

JS Name	Excel Description
Title	Summary tab "Title"
Subject	Summary tab "Subject"
Author	Summary tab "Author"
Manager	Summary tab "Manager"
Company	Summary tab "Company"
Category	Summary tab "Category"
Keywords	Summary tab "Keywords"
Comments	Summary tab "Comments"
LastAuthor	Statistics tab "Last saved by"
CreatedDate	Statistics tab "Created"

For example, to set the workbook title property:

if(!wb.Props) wb.Props = {};
wb.Props.Title = "Insert Title Here";

Custom properties are added in the workbook Custprops object:

if(!wb.Custprops) wb.Custprops = {};
wb.Custprops["Custom Property"] = "Custom Value";

Writers will process the Props key of the options object:

/* force the Author to be "SheetJS" */
XLSX.write(wb, {Props:{Author:"SheetJS"}});

Workbook-Level Attributes

wb.Workbook stores workbook-level attributes.

Defined Names

Format Support (click to show)

Defined Names: XLSX/M, XLSB, BIFF8 XLS, XLML, SYLK

Unicode Defined Names: XLSX/M, XLSB, BIFF8 XLS, XLML

Defined Name Comment: XLSX/M, XLSB, BIFF8 XLS

wb.Workbook.Names is an array of defined name objects which have the keys:

Key	Description
Sheet	Name scope. Sheet Index (0 = first sheet) or null (Workbook)
Name	Case-sensitive name. Standard rules apply **
Ref	A1-style Reference ("Sheet1!$A$1:$D$20")
Comment	Comment (only applicable for XLS/XLSX/XLSB)

Excel allows two sheet-scoped defined names to share the same name. However, a sheet-scoped name cannot collide with a workbook-scope name. Workbook writers may not enforce this constraint.

Workbook Views

wb.Workbook.Views is an array of workbook view objects which have the keys:

Key	Description
RTL	If true, display right-to-left

Miscellaneous Workbook Properties

wb.Workbook.WBProps holds other workbook properties:

Key	Description
CodeName	VBA Workbook Code Name
date1904	epoch: 0/false for 1900 system, 1/true for 1904
filterPrivacy	Warn or strip personally identifying info on save