handsontable/hyperformula

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HyperFormula is an open-source headless spreadsheet for business web apps. It comes with over 400 formulas, CRUD operations, undo-redo, clipboard support, and sorting.

Stars: 2.8k
Forks: 171
Open beginner issues: 0
Indexed issues: 131
Avg merge: 1d 22h
Merged PRs (30d): 7

Dominant language: TypeScript
License: No license data
Last GitHub push: Aug 10, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

131 open issues indexed

[Bug]: ROUND() skips smart rounding, so a cell that displays 109.5 rounds down to 109 Open

Bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

handsontable/hyperformula#1746 · Opened Aug 21, 2026
[Bug]: Array formula spill cells serialize as literal values, so rebuildAndRecalculate() produces #SPILL! Open

Bug

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

handsontable/hyperformula#1745 · Opened Aug 21, 2026
[Bug]: FORMULATEXT is not recalculated when the referenced cell's formula changes Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

handsontable/hyperformula#1744 · Opened Aug 20, 2026
HyperFormula 3.3.0 is here! Open

ANNOUNCEMENT

Difficulty 1/5 Under an hour Newbie friendliness 20/100

handsontable/hyperformula#1685 · 2 reactions · Opened May 27, 2026
[Bug]: Parser fails on formulas with _xlfn.xxx prefix added by Excel for backwards compatibility Open

Bug Impact: High PublicRoadmap

handsontable/hyperformula#1655 · 2 comments · 1 reaction · 1 assignee · Opened Apr 15, 2026
Support for partial infinite ranges (mixed-type ranges) e.g. A2:A Open

Feature

Difficulty 3/5 1-2 days Newbie friendliness 55/100

handsontable/hyperformula#1651 · 4 comments · Opened Apr 8, 2026
Add #CALC! error type for Excel compatibility Open

Feature Impact: Low To Be Discussed

Difficulty 4/5 3-5 days Newbie friendliness 48/100

handsontable/hyperformula#1647 · Opened Mar 30, 2026
Array functions: missing max dimension guard causes OOM crash Open

API Bug Impact: Medium

Difficulty 4/5 3-5 days Newbie friendliness 58/100

handsontable/hyperformula#1646 · 2 comments · Opened Mar 30, 2026
[Bug]: ADDRESS returns "!R2C3" when sheetName is empty (should return "R2C3") Open

Bug Impact: Low

Difficulty 1/5 1-3 hours Newbie friendliness 68/100

handsontable/hyperformula#1641 · Opened Mar 20, 2026
[Bug]: `ParserWithCaching` cache can grow without limit Open

handsontable/hyperformula#1635 · 1 assignee · Opened Mar 10, 2026
HyperFormula 3.2.0 is here! Open

ANNOUNCEMENT

Difficulty 5/5 Over a week Newbie friendliness 10/100

handsontable/hyperformula#1618 · Opened Feb 19, 2026
[Bug]: Wrong table after recalculation when referencing a non-existent sheet Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

handsontable/hyperformula#1615 · 1 comment · Opened Jan 30, 2026
[Research] Interface for using HF with AI agents Open

Feature Impact: High

handsontable/hyperformula#1593 · 1 assignee · Opened Dec 18, 2025
Docs: guide about implementing a custom function with the assist of LLM Open

Docs Impact: Medium

handsontable/hyperformula#1575 · 1 assignee · Opened Dec 3, 2025
Dependency injection Open

Impact: Medium Tech Debt

handsontable/hyperformula#1574 · 1 assignee · Opened Nov 24, 2025
New demos in docs: integration with HOT & integration with AG Grid Open

Docs Feature Impact: Medium

handsontable/hyperformula#1566 · 2 comments · 1 assignee · Opened Oct 30, 2025
[Bug]: TEXT(cell, "0.00%") returns values that are wrong by a factor of 100 Open

Bug Function Impact: Medium

handsontable/hyperformula#1565 · 1 comment · 1 assignee · Opened Oct 26, 2025
Codesandbox embedded demos offer a very poor developer experience Open

Docs Impact: High

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1561 · 1 comment · Opened Oct 14, 2025
Usage example demo: custom report builder Open

Docs Impact: High Named Expressions

Difficulty 3/5 1-2 days Newbie friendliness 42/100

handsontable/hyperformula#1560 · 2 comments · Opened Oct 8, 2025
Improve the formula error messages Open

Feature Impact: High Tech Debt

Difficulty 5/5 Over a week Newbie friendliness 25/100

handsontable/hyperformula#1547 · 1 reaction · Opened Oct 1, 2025
Compare performance of HF vs other javascript libraries Open

Impact: High Performance PublicRoadmap Tests

handsontable/hyperformula#1546 · 1 assignee · Opened Sep 29, 2025
Feature: Iterative Calculation Open

Feature Impact: Low PublicRoadmap

handsontable/hyperformula#1545 · 1 assignee · Opened Sep 25, 2025
[Bug]: Second argument to `INDEX` function should be optional for row ranges Open

Bug Function Impact: Medium

handsontable/hyperformula#1544 · 1 assignee · Opened Sep 23, 2025
License Compatibility Question: Using HyperFormula with MIT-Licensed Project Open

Difficulty 4/5 3-5 days Newbie friendliness 20/100

handsontable/hyperformula#1543 · 1 comment · Opened Sep 19, 2025
[Bug]: Upgrade `chevrotain` dependency to fix `esm.run` import Open

Bug Impact: Medium Tech Debt

handsontable/hyperformula#1534 · 11 comments · 1 assignee · Opened Aug 15, 2025
Error `Cell range not allowed.` when using named expression defined as a cell range directly in a cell Open

Bug Impact: Medium Named Expressions

Difficulty 3/5 1-2 days Newbie friendliness 45/100

handsontable/hyperformula#1533 · 1 reaction · Opened Aug 13, 2025
"Open in Stackblitz" text in button is not visible on iPhone Open

Bug Docs Impact: Medium

Difficulty 3/5 1-2 days Newbie friendliness 45/100

handsontable/hyperformula#1509 · Opened May 19, 2025
[Bug]: moveColumns and setColumnOrder update relative cell references differently Open

API Bug Impact: Medium

Difficulty 4/5 3-5 days Newbie friendliness 48/100

handsontable/hyperformula#1500 · 2 comments · Opened Mar 5, 2025
[Docs] We should alter styling for examples to avoid Deprecation Warnings in the console Open

Docs Impact: Medium

Difficulty 3/5 1-2 days Newbie friendliness 35/100

handsontable/hyperformula#1499 · Opened Mar 5, 2025
[Bug]: Error occurs if the formula contains a reference to a range that contains a reference to a range Open

Bug Impact: Low

Difficulty 4/5 3-5 days Newbie friendliness 38/100

handsontable/hyperformula#1479 · 2 comments · 1 reaction · Opened Jan 12, 2025
Make sure svelte demo is up to date and uses modern svelte code Open

Docs Impact: Low

handsontable/hyperformula#1474 · 1 assignee · Opened Dec 11, 2024
Make sure vue demo is up to date and uses modern vue code Open

Docs Impact: Medium

handsontable/hyperformula#1473 · 1 assignee · Opened Dec 11, 2024
Make sure angular demo is up to date and uses modern angular code Open

Docs Impact: Medium

handsontable/hyperformula#1472 · 1 assignee · Opened Dec 11, 2024
[Bug]: Consistent Range Handling and Formula Text Access in Custom Function Arguments Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1465 · 3 comments · Opened Nov 25, 2024
Make sure react demo is up to date and uses modern react code Open

Docs Impact: Medium

handsontable/hyperformula#1444 · 1 comment · 1 assignee · Opened Sep 4, 2024
Automate the release process Open

Impact: Low Tech Debt

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1413 · Opened Jun 5, 2024
[Bug]: paste after cut gives not changed cells Open

API Bug Impact: Medium

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1411 · 8 comments · Opened May 20, 2024
[Bug]: `COLUMN` doesn't work in the array arithmetic mode Open

Bug Function Impact: Medium

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1407 · 2 comments · Opened Apr 15, 2024
Demo: custom function that uses GPT API Open

Docs Impact: Low

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1394 · Opened Mar 18, 2024
[Bug]: Functions do not take null named expressions into account Open

Bug Impact: Medium Named Expressions

Difficulty 3/5 1-2 days Newbie friendliness 25/100

handsontable/hyperformula#1389 · 2 comments · Opened Mar 7, 2024
Remove `tiny-emitter` dependency Open

Feature Impact: Low

Difficulty 3/5 1-2 days Newbie friendliness 25/100

handsontable/hyperformula#1382 · Opened Feb 22, 2024
Upgrade vuepress to 1.9.9 Open

Docs Feature Impact: Medium

Difficulty 3/5 1-2 days Newbie friendliness 35/100

handsontable/hyperformula#1378 · Opened Feb 20, 2024
Make the demos show their content fully in the guides Open

Docs Good First Issue Impact: Low

Difficulty 3/5 1-2 days Newbie friendliness 45/100

handsontable/hyperformula#1360 · Opened Dec 28, 2023
[Bug]: The *List of differences with other spreadsheets* guide doesn't scale well on narrower screens Open

Bug Docs Good First Issue Impact: Low

Difficulty 3/5 1-2 days Newbie friendliness 45/100

handsontable/hyperformula#1359 · Opened Dec 28, 2023
[Bug]: Warning while building react-demo from documentation Open

Bug Docs Impact: Low

handsontable/hyperformula#1305 · 1 assignee · Opened Sep 14, 2023
[Bug]: copy+pasting a formula that includes number in exponential format fails with the error "There is no AST with such key in the cache" Open

Bug Impact: Medium

Difficulty 3/5 1-2 days Newbie friendliness 35/100

handsontable/hyperformula#1288 · 1 comment · Opened Jun 21, 2023
`#SPILL` error should recalculate on changes to result area (before: "Setting a null value in the ARRAYFORMULA expansion area does not update the NoSpaceForArrayResult error[Bug]") Open

Bug Impact: Medium

Difficulty 4/5 3-5 days Newbie friendliness 45/100

handsontable/hyperformula#1287 · 4 comments · Opened Jun 8, 2023
Add Remix demo Open

Docs Impact: Medium

Difficulty 3/5 1-2 days Newbie friendliness 35/100

handsontable/hyperformula#1278 · 1 comment · Opened May 23, 2023
Add Next.js demo Open

Docs Impact: Medium

handsontable/hyperformula#1277 · 1 assignee · Opened May 23, 2023
Test performance of building dependency graph for a non-trivial multi-sheet workbook (time & memory) Open

Impact: Medium Performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

handsontable/hyperformula#1272 · Opened May 18, 2023

handsontable/hyperformula

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