Docs: document the circular-reference default-behavior difference from Excel - #1770
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…m Excel Adds a row to list-of-differences.md distinct from the existing 'Dependency collection' row (which is scoped to *false* cycles caught by static dependency analysis, e.g. IF(FALSE(), A1, 0)). This one covers a *genuine* circular reference under default settings: HyperFormula always returns CYCLE (iterative calculation, which would let it converge instead, is not yet part of a released version -- #1545); Excel's default (iterative calculation off) is to silently settle the cell to a computed value (0 for a simple self-reference) with no cell-level error at all. Measured live against Excel Online via MS Graph while closed-loop testing HF-131 (message/origin/address on cell errors) -- this difference predates that work and isn't something it changes; documenting it here rather than folding it into that stack, since it's unrelated in scope. Google Sheets' behavior for this specific case was not verified this session and is marked as such rather than assumed from the adjacent row. Verified: npm run docs:build succeeds, the new row renders correctly and the #1545 link resolves. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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| Status | Name | Latest Commit | Preview URL | Updated (UTC) |
|---|---|---|---|---|
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hyperformula-docs | 838df28 | Commit Preview URL Branch Preview URL |
Sep 11 2026, 03:00 AM |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## develop #1770 +/- ##
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Coverage 97.32% 97.32%
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Verified that =A1+1 in A1 displays 0 in Excel Online.
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What and why
Documentation only. Adds a row to
docs/guide/list-of-differences.mdfor a genuine circularreference under default settings (
A1:=A1+1), distinct from the existing "Dependency collection"row, which is scoped specifically to false cycles caught by static dependency analysis
(
IF(FALSE(), A1, 0)) — a different mechanism, a different result shape.CYCLEunless iterative calculation is explicitly enabled(iterative calculation isn't yet part of a released version — #1545).
(
0for a simple self-reference), with no cell-level error at all and no way to detect thecycle from the result alone.
Measured live against Excel Online via MS Graph while closed-loop testing a different, unrelated
stack (message/origin/address on cell errors) — this difference predates that work and isn't
something it changes. Google Sheets' behavior for this specific case wasn't verified this session
and is marked "Not verified" rather than assumed from the adjacent row.
Verified
npm run docs:build— clean; the new row renders correctly and the#1545link resolves🤖 Generated with Claude Code
Note
Low Risk
Documentation-only change to the compatibility guide; no runtime or API impact.
Overview
Adds a Circular references row to the compatibility table in
list-of-differences.md, usingA1:=A1+1to document default behavior separately from the existing Dependency collection row (static/false cycles).The new row states that HyperFormula always surfaces a
CYCLEerror (with a link to #1545 for unreleased iterative calculation), marks Google Sheets as not verified for this case, and notes that Excel with iterative calculation off shows no cell error and settles to a value (e.g.0) with no cycle visible from the result alone.Reviewed by Cursor Bugbot for commit 838df28. Bugbot is set up for automated code reviews on this repo. Configure here.