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feat: built-in XLSX import/export via buildFromFile/toFile (HF-107) - #1702

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feature/hf-107-xlsx-import-export

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feat: built-in XLSX import/export via buildFromFile/toFile (HF-107)#1702
marcin-kordas-hoc wants to merge 24 commits into
developfrom
feature/hf-107-xlsx-import-export

Commits on Aug 27, 2026
- build(io): move exceljs to runtime dependency for built-in xlsx I/O (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  7be379f
- feat(errors): add UnsupportedFileError for xlsx import (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  ac57c94
- feat(io): add loadXlsxWorkbook to load and validate xlsx bytes (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  a014139
- feat(io): add workbookToSheets xlsx importer core (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  fc557e5
- fix(io): strip _xlfn./_xlws. prefixes in xlsx importer formulas (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  282a963
- feat(xlsx): add HyperFormula.buildFromFile public import factory (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  61b5eaa
- feat(io): add xlsx exporter and HyperFormula.toFile (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  8839b8e
- test(io): add xlsx round-trip specs for import<->export (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  6abbcbd
- docs(guide): document built-in buildFromFile/toFile xlsx I/O (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  2080532
- refactor(io): lazy-load exceljs + externalize in base bundle (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  2c433bf
- fix(io): keep exceljs and buffer polyfill out of UMD bundles (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  ce85904
- test(io): relocate xlsx specs to hyperformula-tests repo (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  76ee6ca
- fix(io): correct xlsx export byte conversion for browser ArrayBuffer (HF-107)
  
  marcin-kordas-hoc
  and
  claude
  committed
  f28710e
Commits on Aug 28, 2026
- implement-iterate: green after 1 iteration(s)
  marcin-kordas-hoc
  committed
  5d9f252
Commits on Sep 11, 2026
- Merge develop into the XLSX import/export branch
  
  marcin-kordas-hoc
  and
  claude
  committed
  7ad1ff2
Commits on Sep 14, 2026
- Declare exceljs an optional peer dependency instead of a runtime one
  
  marcin-kordas-hoc
  and
  claude
  committed
  7c4f9e0
- Keep the lockfile change to the dependency reclassification alone
  
  marcin-kordas-hoc
  and
  claude
  committed
  f7803d8
- Keep exceljs external in the documentation's server bundle
  
  marcin-kordas-hoc
  and
  claude
  committed
  148f8e6
- Bundle exceljs into the Karma test bundle instead of externalising it
  
  marcin-kordas-hoc
  and
  claude
  committed
  7f67a1f
Commits on Oct 23, 2026

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feat: built-in XLSX import/export via buildFromFile/toFile (HF-107) - #1702

feat: built-in XLSX import/export via buildFromFile/toFile (HF-107)#1702
marcin-kordas-hoc wants to merge 24 commits into
developfrom
feature/hf-107-xlsx-import-export

Commits on Aug 27, 2026

build(io): move exceljs to runtime dependency for built-in xlsx I/O (HF-107)

feat(errors): add UnsupportedFileError for xlsx import (HF-107)

feat(io): add loadXlsxWorkbook to load and validate xlsx bytes (HF-107)

feat(io): add workbookToSheets xlsx importer core (HF-107)

fix(io): strip _xlfn./_xlws. prefixes in xlsx importer formulas (HF-107)

feat(xlsx): add HyperFormula.buildFromFile public import factory (HF-107)

feat(io): add xlsx exporter and HyperFormula.toFile (HF-107)

test(io): add xlsx round-trip specs for import<->export (HF-107)

docs(guide): document built-in buildFromFile/toFile xlsx I/O (HF-107)

refactor(io): lazy-load exceljs + externalize in base bundle (HF-107)

fix(io): keep exceljs and buffer polyfill out of UMD bundles (HF-107)

test(io): relocate xlsx specs to hyperformula-tests repo (HF-107)

fix(io): correct xlsx export byte conversion for browser ArrayBuffer (HF-107)

Commits on Aug 28, 2026

implement-iterate: green after 1 iteration(s)

Commits on Sep 11, 2026

Merge develop into the XLSX import/export branch

Commits on Sep 14, 2026

Declare exceljs an optional peer dependency instead of a runtime one

Keep the lockfile change to the dependency reclassification alone

Keep exceljs external in the documentation's server bundle

Bundle exceljs into the Karma test bundle instead of externalising it

Commits on Oct 23, 2026

HF-107: Merge develop, which moved the engine into hyperformula/, into the XLSX import/export branch

HF-107: Load ExcelJS from its default export when a native import() exposes it only there

HF-107: Keep an imported text cell that starts with = or an apostrophe as text

HF-107: Export cell values instead of their input, and formulas in the syntax of an xlsx file

HF-107: Correct the file import guide and the changelog entry for xlsx import and export