[DESCRIPTION]

In this fork I try to merge two forks (https://github.com/mgreter/js-xlsx and https://github.com/protobi/js-xlsx) for implement cell styles and support for inserting images.
Style example:
``js
excelCell.s = {
fill: {
patternType: "none", // none / solid
fgColor: {rgb: "FF000000"},
bgColor: {rgb: "FFFFFFFF"}
},
font: {
name: 'Times New Roman',
sz: 16,
color: {rgb: "#FF000000"},
bold: false,
italic: false,
underline: false
},
border: {
top: {style: "thin", color: {auto: 1}},
right: {style: "thin", color: {auto: 1}},
bottom: {style: "thin", color: {auto: 1}},
left: {style: "thin", color: {auto: 1}}
}
};
`
Image example:

write:

`js
var data = "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ws["!images"] = [{
name: 'image.png',
data: data,
opts: {base64: true},
type: "png",
position: {
type: 'twoCellAnchor',
attrs: {editAs: 'oneCell'},
from: {col: 3, row: 3},
to: {col: 6, row: 6}
}
}
];
`

read:

`
var XLSX = require('ls-xlsx')
var workbook = XLSX.readFile(files.path)
//images:
 
  var images = workbook.sheets['xx']['!images']
//results: [
     name: 'x'x.png',
data: function(){ return ... },
fromColName:'A1',
toColName:'A1',
position: {
type:'twoCellAnchor',
from: {col: 1, row: 3},
to: {col: 1, row: 6}
}
....
]

//read image data
var img =images[0];
var buffer = img.data().asNodeBuffer() //other....

`



JSFiddle: https://jsfiddle.net/1g24vowu/1/

SheetJS js-xlsx

Parser and writer for various spreadsheet formats. Pure-JS cleanroom
implementation from official specifications, related documents, and test files.
Emphasis on parsing and writing robustness, cross-format feature compatibility
with a unified JS representation, and ES3/ES5 browser compatibility back to IE6.

This is the community version. We also offer a pro version with performance
enhancements, additional features by request, and dedicated support.


Pro Version

Commercial Support

Rendered Documentation

In-Browser Demos

Source Code

Issues and Bug Reports

Other General Support Issues

File format support for known spreadsheet data formats:

Graph of supported formats (click to show)

!circo graph of format support

!graph legend

Browser Test



Table of Contents

Expand to show Table of Contents

- Installation
* JS Ecosystem Demos
* Optional Modules
* ECMAScript 5 Compatibility
- Philosophy
- Parsing Workbooks
* Complete Examples
* Note on Streaming Read
- Working with the Workbook
* Complete Examples
- Writing Workbooks
* Complete Examples
* Streaming Write
- Interface
* Parsing functions
* Writing functions
* Utilities
- Common Spreadsheet Format
* General Structures
* Cell Object
+ Data Types
+ Dates
* Sheet Objects
+ Worksheet Object
+ Chartsheet Object
* Workbook Object
+ Workbook File Properties
* Workbook-Level Attributes
+ Defined Names
* Document Features
+ Formulae
+ Column Properties
+ Row Properties
+ Number Formats
+ Hyperlinks
+ Cell Comments
+ Sheet Visibility
- Parsing Options
* Input Type
* Guessing File Type
- Writing Options
* Supported Output Formats
* Output Type
- Utility Functions
* Array of Arrays Input
* Array of Objects Input
* HTML Table Input
* Formulae Output
* Delimiter-Separated Output
+ UTF-16 Unicode Text
* HTML Output
* JSON
- File Formats
* Excel 2007+ XML (XLSX/XLSM)
* Excel 2.0-95 (BIFF2/BIFF3/BIFF4/BIFF5)
* Excel 97-2004 Binary (BIFF8)
* Excel 2003-2004 (SpreadsheetML)
* Excel 2007+ Binary (XLSB, BIFF12)
* Delimiter-Separated Values (CSV/TXT)
* Other Workbook Formats
+ Lotus 1-2-3 (WKS/WK1/WK2/WK3/WK4/123)
+ Quattro Pro (WQ1/WQ2/WB1/WB2/WB3/QPW)
+ OpenDocument Spreadsheet (ODS/FODS)
+ Uniform Office Spreadsheet (UOS1/2)
* Other Single-Worksheet Formats
+ dBASE and Visual FoxPro (DBF)
+ Symbolic Link (SYLK)
+ Lotus Formatted Text (PRN)
+ Data Interchange Format (DIF)
+ HTML
- Testing
* Node
* Browser
* Tested Environments
* Test Files
- Contributing
* OSX/Linux
* Windows
* Tests
- License
- References

Installation

In the browser, just add a script tag:

`html

`

With npm:

`bash
$ npm install ls-xlsx
`

With bower:

`bash
$ bower install js-xlsx
`

CDNjs automatically pulls the latest version and makes all versions available at

$3

The demos directory includes sample projects for:

- angular
- browserify
- Adobe ExtendScript
- phantomjs
- requirejs
- systemjs
- webpack

$3

The node version automatically requires modules for additional features. Some
of these modules are rather large in size and are only needed in special
circumstances, so they do not ship with the core. For browser use, they must
be included directly:

`html


`

An appropriate version for each dependency is included in the dist/ directory.

The complete single-file version is generated at dist/xlsx.full.min.js

Webpack and browserify builds include optional modules by default. Webpack can
be configured to remove support with resolve.alias:

`js
/ uncomment the lines below to remove support /
resolve: {
alias: { "./dist/cpexcel.js": "" } // <-- omit international support
}
`

$3

Since xlsx.js uses ES5 functions like Array#forEach, older browsers require
Polyfills. This repo and the gh-pages branch include
a shim

To use the shim, add the shim before the script tag that loads xlsx.js:

`html

`

Philosophy

Philosophy (click to show)

Prior to SheetJS, APIs for processing spreadsheet files were format-specific.
Third-party libraries either supported one format, or they involved a separate
set of classes for each supported file type. Even though XLSB was introduced in
Excel 2007, nothing outside of SheetJS or Excel supported the format.

To promote a format-agnostic view, js-xlsx starts from a pure-JS representation
that we call the "Common Spreadsheet Format".
Emphasizing a uniform object representation enables radical features like format
conversion (e.g. reading an XLSX template and saving as XLS) and circumvents the
"class trap". By abstracting the complexities of the various formats, tools
need not worry about the specific file type!

A simple object representation combined with careful coding practices enables
use cases in older browsers and in alternative environments like ExtendScript
and Web Workers. It is always tempting to use the latest and greatest features,
but they tend to require the latest versions of browsers, limiting usability.

Utility functions capture common use cases like generating JS objects or HTML.
Most simple operations should only require a few lines of code. More complex
operations generally should be straightforward to implement.

Excel pushes the XLSX format as default starting in Excel 2007. However, there
are other formats with more appealing properties. For example, the XLSB format
is spiritually similar to XLSX but files often tend up taking less than half the
space and open much faster! Even though an XLSX writer is available, other
format writers are available so users can take advantage of the unique
characteristics of each format.

Parsing Workbooks

For parsing, the first step is to read the file. This involves acquiring the
data and feeding it into the library. Here are a few common scenarios:

nodejs read a file (click to show)

`js
if(typeof require !== 'undefined') XLSX = require('xlsx');
var workbook = XLSX.readFile('test.xlsx');
/ DO SOMETHING WITH workbook HERE /
`







Browser read TABLE element from page (click to show)

`js
var worksheet = XLSX.utils.table_to_book(document.getElementById('tableau'));
/ DO SOMETHING WITH workbook HERE /
`







Browser download file (ajax) (click to show)

Note: for a more complete example that works in older browsers, check the demo
at ):

`js
/ set up XMLHttpRequest /
var url = "test_files/formula_stress_test_ajax.xlsx";
var oReq = new XMLHttpRequest();
oReq.open("GET", url, true);
oReq.responseType = "arraybuffer";

oReq.onload = function(e) {
var arraybuffer = oReq.response;

/ convert data to binary string /
var data = new Uint8Array(arraybuffer);
var arr = new Array();
for(var i = 0; i != data.length; ++i) arr[i] = String.fromCharCode(data[i]);
var bstr = arr.join("");

/ Call XLSX /
var workbook = XLSX.read(bstr, {type:"binary"});

/ DO SOMETHING WITH workbook HERE /
}

oReq.send();
`







Browser drag-and-drop (click to show)

Drag-and-drop uses FileReader with readAsBinaryString or readAsArrayBuffer.
Note: readAsBinaryString and readAsArrayBuffer may not be available in every
browser. Use dynamic feature tests to determine which method to use.

`js
/ processing array buffers, only required for readAsArrayBuffer /
function fixdata(data) {
var o = "", l = 0, w = 10240;
for(; lw,lw+w)));
o+=String.fromCharCode.apply(null, new Uint8Array(data.slice(l*w)));
return o;
}

var rABS = true; // true: readAsBinaryString ; false: readAsArrayBuffer
/ set up drag-and-drop event /
function handleDrop(e) {
e.stopPropagation();
e.preventDefault();
var files = e.dataTransfer.files;
var i,f;
for (i = 0; i != files.length; ++i) {
f = files[i];
var reader = new FileReader();
var name = f.name;
reader.onload = function(e) {
var data = e.target.result;

var workbook;
if(rABS) {
/ if binary string, read with type 'binary' /
workbook = XLSX.read(data, {type: 'binary'});
} else {
/ if array buffer, convert to base64 /
var arr = fixdata(data);
workbook = XLSX.read(btoa(arr), {type: 'base64'});
}

/ DO SOMETHING WITH workbook HERE /
};
if(rABS) reader.readAsBinaryString(f);
else reader.readAsArrayBuffer(f);
}
}
drop_dom_element.addEventListener('drop', handleDrop, false);
`







Browser file upload form element (click to show)

`js
/ fixdata and rABS are defined in the drag and drop example /
function handleFile(e) {
var files = e.target.files;
var i,f;
for (i = 0; i != files.length; ++i) {
f = files[i];
var reader = new FileReader();
var name = f.name;
reader.onload = function(e) {
var data = e.target.result;

var workbook;
if(rABS) {
/ if binary string, read with type 'binary' /
workbook = XLSX.read(data, {type: 'binary'});
} else {
/ if array buffer, convert to base64 /
var arr = fixdata(data);
workbook = XLSX.read(btoa(arr), {type: 'base64'});
}

/ DO SOMETHING WITH workbook HERE /
};
reader.readAsBinaryString(f);
}
}
input_dom_element.addEventListener('change', handleFile, false);
`



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- HTML5 File API / Base64 Text / Web Workers

Note that older versions of IE do not support HTML5 File API, so the base64 mode
is used for testing. On OSX you can get the base64 encoding with:

`bash
$ `

On Windows XP and up you can get the base64 encoding using certutil:

`cmd
> certutil -encode target_file target_file.b64
`

(note: You have to open the file and remove the header and footer lines)

- XMLHttpRequest

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The most common and interesting formats (XLS, XLSX/M, XLSB, ODS) are ultimately
ZIP or CFB containers of files. Neither format puts the directory structure at
the beginning of the file: ZIP files place the Central Directory records at the
end of the logical file, while CFB files can place the FAT structure anywhere in
the file! As a result, to properly handle these formats, a streaming function
would have to buffer the entire file before commencing. That belies the
expectations of streaming, so we do not provide any streaming read API. If you
really want to stream, there are node modules like concat-stream that will do
the buffering for you.

Working with the Workbook

The full object format is described later in this README.

This example extracts the value stored in cell A1 from the first worksheet:

`js
var first_sheet_name = workbook.SheetNames[0];
var address_of_cell = 'A1';

/ Get worksheet /
var worksheet = workbook.Sheets[first_sheet_name];

/ Find desired cell /
var desired_cell = worksheet[address_of_cell];

/ Get the value /
var desired_value = (desired_cell ? desired_cell.v : undefined);
`

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- node

The node version installs a command line tool xlsx which can read spreadsheet
files and output the contents in various formats. The source is available at
xlsx.njs in the bin directory.

Some helper functions in XLSX.utils generate different views of the sheets:

- XLSX.utils.sheet_to_csv generates CSV
- XLSX.utils.sheet_to_html generates HTML
- XLSX.utils.sheet_to_json generates an array of objects
- XLSX.utils.sheet_to_formulae generates a list of formulae

Writing Workbooks

For writing, the first step is to generate output data. The helper functions
write and writeFile will produce the data in various formats suitable for
dissemination. The second step is to actual share the data with the end point.
Assuming workbook is a workbook object:



nodejs write a file (click to show)

`js
/ output format determined by filename /
XLSX.writeFile(workbook, 'out.xlsx');
/ at this point, out.xlsx is a file that you can distribute /
`







Browser download file (click to show)

Note: browser generates binary blob and forces a "download" to client. This
example uses FileSaver.js:

`js
/ bookType can be any supported output type /
var wopts = { bookType:'xlsx', bookSST:false, type:'binary' };

var wbout = XLSX.write(workbook,wopts);

function s2ab(s) {
var buf = new ArrayBuffer(s.length);
var view = new Uint8Array(buf);
for (var i=0; i!=s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;
return buf;
}

/ the saveAs call downloads a file on the local machine /
saveAs(new Blob([s2ab(wbout)],{type:"application/octet-stream"}), "test.xlsx");
`


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- exporting an HTML table
- generates a simple file

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The streaming write functions are available in the XLSX.stream object. They
take the same arguments as the normal write functions but return a readable
stream. They are only exposed in node.

- XLSX.stream.to_csv is the streaming version of XLSX.utils.sheet_to_csv.
- XLSX.stream.to_html is the streaming version of XLSX.utils.sheet_to_html.



nodejs convert to CSV and write file (click to show)

`js
var output_file_name = "out.csv";
var stream = XLSX.stream.to_csv(worksheet);
stream.pipe(fs.createWriteStream(output_file_name));
`



pipes write streams to nodejs response.

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.

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

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

Parse options are described in the Parsing Options section.

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

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

XLSX.writeFileAsync(filename, wb, o, cb) attempts to write wb to filename.
If o is omitted, the writer will use the third argument as the callback.

XLSX.stream contains a set of streaming write functions.

Write options are described in the Writing Options section.

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Utilities are available in the XLSX.utils object:

Importing:

- aoa_to_sheet converts an array of arrays of JS data to a worksheet.
- json_to_sheet converts an array of JS objects to a worksheet.
- table_to_sheet converts a DOM TABLE element to a worksheet.

Exporting:

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

These utilities are described in Utility Functions below.


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

Utilities are described in the Utility Functions section.

Common Spreadsheet Format

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

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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:

`js
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};
}
}
`

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| 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 encoded as an A1-style string (if applicable) |
| F | range of enclosing array if formula is array 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.

The actual array formula is stored in the f field of the first cell in the
array range. Other cells in the range will omit the f field.

#### 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:



Error values and interpretation (click to show)

| 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. Dates are
stored as numbers by default and converted with XLSX.SSF.parse_date_code.

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 timezone modifiers 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.

Type z represents blank stub cells. These do not have any data or type, and
are not processed by any of the core library functions. By default these cells
will not be generated; the parser sheetStubs option must be set to true.

#### Dates

By default, Excel stores dates as numbers with a format code that specifies date
processing. For example, the date 19-Feb-17 is stored as the number 42785
with a number format of d-mmm-yy. The SSF module understands number formats
and performs the appropriate conversion.

XLSX also supports a special date type d where the data is an ISO 8601 date
string. The formatter converts the date back to a number.

The default behavior for all parsers is to generate number cells. Setting
cellDates to true will force the generators to store dates.

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

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

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

- 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 |

`js
/ Set worksheet sheet to "normal" /
sheet["!margins"] = { left:0.7, right:0.7, top:0.75, bottom:0.75, header:0.3, footer:0.3 }
/ Set worksheet sheet to "wide" /
sheet["!margins"] = { left:1.0, right:1.0, top:1.0, bottom:1.0, header:0.5, footer:0.5 }
/ Set worksheet sheet to "narrow" /
sheet["!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 base 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. 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['!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:

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

#### 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.

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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.WBProps includes more workbook-level properties:

- Excel supports two epochs (January 1 1900 and January 1 1904), see
1900 vs. 1904 Date System.
The workbook's epoch can be determined by examining the workbook's
wb.WBProps.date1904 property.

#### Workbook 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:

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

Custom properties are added in the workbook Custprops object:

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

Writers will process the Props key of the options object:

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

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wb.Workbook stores workbook level attributes.

#### Defined Names

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



Defined Name Properties (click to show)

| Key | Description |
|:----------|:-----------------------------------------------------------------|
| Sheet | Name scope. Sheet Index (0 = first sheet) or null (Workbook) |
| Name | Case-sensitive name. Standard rules apply ** |
| Ref | A1-style Reference (e.g. "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.

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Even for basic features like date storage, the official Excel formats store the
same content in different ways. The parsers are expected to convert from the
underlying file format representation to the Common Spreadsheet Format. Writers
are expected to convert from CSF back to the underlying file format.

#### Formulae

The A1-style formula string is stored in the f field. Even though different
file formats store the formulae in different ways, the formats are translated.
Even though some formats store formulae with a leading equal sign, CSF formulae
do not start with =.



Representation of A1=1, A2=2, A3=A1+A2 (click to show)

`js
{
"!ref": "A1:A3",
A1: { t:'n', v:1 },
A2: { t:'n', v:2 },
A3: { t:'n', v:3, f:'A1+A2' }
}
`




Shared formulae are decompressed and each cell has the formula corresponding to
its cell. Writers generally do not attempt to generate shared formulae.

Cells with formula entries but no value will be serialized in a way that Excel
and other spreadsheet tools will recognize. This library will not automatically
compute formula results! For example, to compute BESSELJ in a worksheet:



Formula without known value (click to show)

`js
{
"!ref": "A1:A3",
A1: { t:'n', v:3.14159 },
A2: { t:'n', v:2 },
A3: { t:'n', f:'BESSELJ(A1,A2)' }
}
`




Array Formulae

Array formulae are stored in the top-left cell of the array block. All cells
of an array formula have a F field corresponding to the range. A single-cell
formula can be distinguished from a plain formula by the presence of F field.



Array Formula examples (click to show)

For example, setting the cell C1 to the array formula {=SUM(A1:A3*B1:B3)}:

`js
worksheet['C1'] = { t:'n', f: "SUM(A1:A3*B1:B3)", F:"C1:C1" };
`

For a multi-cell array formula, every cell has the same array range but only the
first cell specifies the formula. Consider D1:D3=A1:A3*B1:B3:

`js
worksheet['D1'] = { t:'n', F:"D1:D3", f:"A1:A3*B1:B3" };
worksheet['D2'] = { t:'n', F:"D1:D3" };
worksheet['D3'] = { t:'n', F:"D1:D3" };
`





Utilities and writers are expected to check for the presence of a F field and
ignore any possible formula element f in cells other than the starting cell.
They are not expected to perform validation of the formulae!



Formula Output Utility Function (click to show)

The sheet_to_formulae method generates one line per formula or array formula.
Array formulae are rendered in the form range=formula while plain cells are
rendered in the form cell=formula or value. Note that string literals are
prefixed with an apostrophe ', consistent with Excel's formula bar display.


Formulae File Format Details (click to show)

| Storage Representation | Formats | Read | Write |
|:-----------------------|:-------------------------|:-----:|:-----:|
| A1-style strings | XLSX | :o: | :o: |
| RC-style strings | XLML and plaintext | :o: | :o: |
| BIFF Parsed formulae | XLSB and all XLS formats | :o: | |
| OpenFormula formulae | ODS/FODS/UOS | :o: | :o: |

Since Excel prohibits named cells from colliding with names of A1 or RC style
cell references, a (not-so-simple) regex conversion is possible. BIFF Parsed
formulae have to be explicitly unwound. OpenFormula formulae can be converted
with regexes for the most part.

#### Column Properties

The !cols array in each worksheet, if present, is a collection of ColInfo
objects which have the following properties:

`typescript
type ColInfo = {
/ visibility /
hidden?: boolean; // if true, the column is hidden

/ column width is specified in one of the following ways: /
wpx?: number; // width in screen pixels
width?: number; // width in Excel's "Max Digit Width", width*256 is integral
wch?: number; // width in characters

/ other fields for preserving features from files /
MDW?: number; // Excel's "Max Digit Width" unit, always integral
};
`

Why are there three width types? (click to show)

There are three different width types corresponding to the three different ways
spreadsheets store column widths:

SYLK and other plaintext formats use raw character count. Contemporaneous tools
like Visicalc and Multiplan were character based. Since the characters had the
same width, it sufficed to store a count. This tradition was continued into the
BIFF formats.

SpreadsheetML (2003) tried to align with HTML by standardizing on screen pixel
count throughout the file. Column widths, row heights, and other measures use
pixels. When the pixel and character counts do not align, Excel rounds values.

XLSX internally stores column widths in a nebulous "Max Digit Width" form. The
Max Digit Width is the width of the largest digit when rendered (generally the
"0" character is the widest). The internal width must be an integer multiple of
the the width divided by 256. ECMA-376 describes a formula for converting
between pixels and the internal width. This represents a hybrid approach.

Implementation details (click to show)

Given the constraints, it is possible to determine the MDW without actually
inspecting the font! The parsers guess the pixel width by converting from width
to pixels and back, repeating for all possible MDW and selecting the MDW that
minimizes the error. XLML actually stores the pixel width, so the guess works
in the opposite direction.

Even though all of the information is made available, writers are expected to
follow the priority order:

1) use width field if available
2) use wpx pixel width if available
3) use wch character count if available




#### Row Properties

The !rows array in each worksheet, if present, is a collection of RowInfo
objects which have the following properties:

`typescript
type RowInfo = {
/ visibility /
hidden?: boolean; // if true, the row is hidden

/ row height is specified in one of the following ways: /
hpx?: number; // height in screen pixels
hpt?: number; // height in points
};
``

Implementation details (click to show)

Excel internally stores row heights in points. The default resolution is 72 DPI
or 96 PPI, so the pixel and point size should agree. For different resolutions
they may not agree, so the library separates the concepts.

Even t