Breaking Change

• Upgrade requirements Go language version is 1.18 or later, for upgrade of dependency package golang.org/x/net
• Change the data type for the HeaderFooterOptions structure fields AlignWithMargins and ScaleWithDoc as a pointer, resolve issue #1645
• Remove unused exported data structure ShapeColor

Notable Features

• Add new exported function SetCellUint, related issue #1681
• Add new exported function GetPictureCells for get all picture cells, related issue #1218
• Add new exported function GetConditionalStyle for get the conditional format style definition, related issue #1690
• Add new exported function GetHeaderFooter for get the worksheet header and footer
• Add new exported function AddSlicer for adding table and pivot table slicers
• Add new exported function GetPivotTables for get pivot tables
• Add new exported function DeletePivotTable for delete pivot table
• Add a new Name field in the PivotTableOptions to support specify pivot table name
• New support 7 formula functions: DBCS, SEARCH, SEARCHB, TEXT, TEXTAFTER, TEXTBEFORE and xlfn.ANCHORARRAY
• Add export ChartLineType enumeration to specify the chart line type, related issue #1706
• Add new Border field in the Chart data type to set the chart area border
• Add new Type field in the ChartLine type to set the line type
• Add new exported source relationship and namespace NameSpaceSpreadSheetXR10, ContentTypeSlicer, ContentTypeSlicerCache, and SourceRelationshipSlicer
• Add new exported extended URI ExtURIPivotCacheDefinition
• Allow dot character in the defined name, table name, or pivot table name
• Keep all cells value in the table range when deleting table
• Support format cell value with fraction number format code
• Support delete image files from the workbook internally when deleting pictures to reduce generated workbook size and resolve potential security issues
• Support set the height and width for the comment box, related issue #1688
• Support update conditional formatting, data validations, defined names, drawing objects, formula reference and volatile dependencies on inserting/deleting columns/rows, related issues #1306 and #1615
• Support 6 new kinds of conditional formatting types: text, blanks, no blanks, errors, no errors and time period
• Support calculate formula with multiple dash arithmetic symbol
• Support copy conditional format and data validation on duplicate row, related issue #1729
• Support unset custom row height if the height value is -1 when using the SetRowHeight function
• The SetRowHeight function will return an error if given an invalid row height value
• The AddChart function support set the data labels position for the chart, related issue #1704
• The AddChart function support set solid color or transparent fill for chart area, plot area, and maker, add a new field Fill in Chart, ChartPlotArea, and ChartMarker data type, related issue #1786
• The AddChart function support set chart axis font family, size and strike style, related issue #1809
• Add new field DataLabelPosition in the ChartSeries data type, support to sets the position of the chart series data label
• Add new field BubbleSize in the Chart data type, support set the bubble size in all data series for the bubble chart or 3D bubble chart
• Add new exported ChartDataLabelPositionType data type
• The GetPictureCells and GetPictures function support get embedded cell images created by Kingsoft WPS™ Office, related issue #664
• The SetConditionalFormat function support set conditional formatting with multiple cell ranges, related issue #1783
• Support to update defined names reference when rename worksheet, related issue #1792
• Add new GetBaseColor function support get the preferred hex color code, related issue #1794
• The calculation engine support date and formula type cells, related issue #1807
• Cell value reading functions inherit the Options settings of the OpenReader, related issue #1815

Improve the Compatibility

• Improve compatibility for absolute path drawing part
• Improve compatibility for workbook internal tab ratio property value
• Improve compatibility with empty custom number format code
• Improve compatibility with the viewer which doesn't support default theme part namespace, related issue #1694
• Improve delete cell comment shape compatibility with KingSoft WPS™ Office, related issue #1789
• Saving workbook with sorted internal part path, make identically created workbooks hash checksum is same, related issue #1732

Bug Fixes

• Add check for MID and MIDB formula functions num_chars arguments, prevent panic on specifying a negative number, resolve issue #1647
• Fix empty calculate result with numeric arguments in LEN, LOWER, PROPER, REPT, UPPER, and IF formula functions
• Fix calculate formula functions CHITEST and MMULT panic in some cases
• Fix a v2.8.0 regression bug, error on set print area and print titles with built-in special defined name
• Fix a v2.8.0 regression bug, corrupted workbooks generated by improving compatibility with internally indexed color and MRU colors styles parts
• Fix a v2.8.0 regression bug, number format code apply result was empty, resolve issue #1658
• Fix a v2.7.1 regression bug, the bubble is hidden in the bubble or 3D bubble chart
• Fixed panic on AutoFilter by adding nil pointer guard for local sheet ID, resolve issue #1655
• Fix corrupted workbooks generated when adding tables in some cases
• Fix incorrect time number format result, resolve issue #1661
• Supports getting formula string cell value, resolve issue #1665
• Fix incorrect table ID generated in the workbook which contains single table cells
• Fix missing relationship parts in the content types in some cases
• Upgrade number format parser to fix missing literal tokens in some cases
• Update built-in zh-cn and zh-tw language number format
• Fix the incorrect custom number format ID allocated, resolve issue #1677
• Fix updating a table's range by removing it and creating it again doesn't work, resolve issue #1682
• Fix a potential issue that stream reader temporary files can not be clear, resolve issue #1680
• Fix incorrect formula calculation result in some cases, resolve issue #1681
• Fix concurrency race conditions on get cell value, resolve issue #1687
• Fix some format missing on get style definition, resolve issue #1708
• Fix number format scientific notation zero fill issues, resolve issue #1710
• Fix panic on read workbook with internal row element without r attribute, resolve issue #1723
• Fix GetCellRichText returns error on getting inline rich text cells
• Fix invalid shared string table index on set cell value in some cases
• Fix GetConditionalFormats panic on get conditional format without above average rules, resolve issue #1745
• Fix incorrect adjust merged cells on remove rows, resolve issue #1749
• Fix the SetConditionalFormat function creates incorrect multiple conditional formats rules priority, resolve issue #1770
• Fix the GetConditionalFormats function doesn't return gradient data bar rule, resolve issue #1769
• Fix the GetStyle or GetConditionalStyle function to returns incorrect DecimalPlaces field value, resolve issue #1777
• Fix the CalcCellValue function does not return raw value when enable RawCellValue, resolve issue #1803

Performance

• Improves performance for adding and removing pivot table and images
• Reduce memory consumption by trimming the rows and cells, resolve issue #1712

Miscellaneous

• The dependencies module has been updated
• Unit tests and godoc updated
• Documentation website with multilingual: Arabic, German, Spanish, English, French, Russian, Chinese, Japanese, and Korean, which has been updated

Thank you

• fnickels (Francis Nickels III)
• m12r (Matthias Endler)
• Abdelaziz-Ouhammou
• Juneezee (Eng Zer Jun)
• yicixin (壹次心)
• TeeRenJing (rjtee)
• phperic (magicrabbit)
• kjushka (Anton Petrov)
• krstak (Marko Krstic)
• lpxxn (Nick)
• ByteFlyCoding
• yangliyl (Yang Li)
• 15535382838
• TajangSec (Tajang)
• lujin1 (lujin)
• parkoo (Tian)
• ZhangXiao1024 (ZX)
• zcgly
• bramvbilsen (Bram Vanbilsen)
• user65536
• tianaiyouqing (天爱有情)
• cuishuang (cui fliter)
• CooolNv (Xuesong)
• yuegu520
• oneweek20169902 (li)
• 3zmx
• 327674413
• melf-xyzh (MELF晓宇)
• L4nn15ter
• rememberher (Jerry)
• ooooooobh (cherry)
• xxxwang1983
• funa12
• coolbit
• taitaking (zhukewen)
• kewenof
• ivekkairi (Vivek Kairi)
• edwardfward (Ed)