PR Triage Summary — Preparing for Stable 0.30 Release

[lnagel]

I reviewed all 23 open pull requests against the current 0.30.0-beta.9 codebase. The entire project has been rewritten from JavaScript to TypeScript, moment.js to dayjs, Webpack to Vite, and Enzyme to @testing-library/react. Most older PRs target files that no longer exist. Each PR has been commented on individually with detailed findings.

Worth Porting — Bug Fixes (apply directly to current codebase)

These PRs fix real bugs that are confirmed still present. The fixes are small enough to apply directly rather than rebasing the original PRs.

#	PR	What it fixes	Effort
#896	getSumScroll null check	Crash when parentNode is null during drag (issue #900)	Trivial — 1 line
#841	Fix asymmetric wheel zoom	Zoom in/out by same delta doesn't return to original level — formula is mathematically asymmetric	Trivial — 2-3 lines in Timeline.tsx:526

Worth Porting — Features (reimplement against current TS codebase)

These PRs introduce valuable features with sound architecture. They target old JS files so can't merge directly, but the concepts should be carried forward.

#	PR	Feature	Effort
#961	Custom timescale	Non-calendar timescales (numeric ranges, custom units). Already targets TS codebase, most compatible of all PRs. Needs refactoring of static config to props.	Medium
#854	Stack order enforcement	shouldStackEnforceOrder group param to maintain array order in stacking. Clean, opt-in, backward-compatible approach.	Low-Medium
#850	rowRenderer prop	Full customization of group row rendering (heatmaps, availability grids, per-cell coloring). Follows existing itemRenderer/groupRenderer pattern.	Small-Medium
#845	onEndTimeChange event	Callback when scrolling finishes, for loading data only on scroll-end instead of every tick. Clean implementation with scrolled flag tracking.	Medium
#787	Limit item dragging between groups	Extends moveResizeValidator to return { dragTime, dragGroupDelta } for constraining both time and group during drag. Backward-compatible.	Medium
#898	Item collision event	onCollision callback after move/resize to detect overlapping items. Concept is good but implementation has bugs (ID vs index mismatch) and should use existing collision() function.	Medium

Outdated — Superseded by the 0.30 Rewrite

These PRs target old .js files that no longer exist and fix issues that have been resolved by the rewrite, or are no longer applicable.

#	PR	Why outdated
#928	Handling of Canvas time	Demo files restructured, moment to dayjs, canvas time management rewritten
#923	Yarn to pnpm migration	Package manager is now npm, entire dependency tree replaced
#914	onTimeChange issue	Timeline.js is now Timeline.tsx, interaction logic rearchitected
#893	onTimeChange called before onItemDrag	Same as #914 — Timeline.js no longer exists, logic rewritten
#889	Vertical margin between stacked items	Superseded by itemVerticalGap prop already in 0.30
#875	Auto-scroll when dragging near borders	Item.js is now Item.tsx, moveResizeValidator signature changed
#873	Diagonal scroll trackpad	ScrollElement.js is now ScrollElement.tsx, completely rewritten with Pointer Events API
#851	Horizontal scroll fix	Timeline.js is now Timeline.tsx, scroll sync logic restructured
#834	onScroll min/max value fix	Timeline.js is now Timeline.tsx, scroll handler rewritten
#819	Replace moment with dateDriver	Already done — moment replaced with dayjs throughout
#724	Add minHeight prop	All target files rewritten, stacking/layout logic diverged
#695	Move headers to scroll element	All target files rewritten in TS, stickyHeader prop removed
#659	Enable style customization	Already done — SCSS now uses !default variables for customization, composeEvents rewritten
#651	Remove componentWillReceiveProps	Already done — zero occurrences of componentWillReceiveProps in current source

Dependabot

#	PR	Status
#993	Bump next 15 to 16 in /demo-next	Demo dependency update, can be merged or closed independently

Key Takeaways

1. 14 of 23 PRs are fully outdated due to the JS to TS rewrite. These can be closed with thanks to contributors.
2. 6 PRs have concepts worth porting as fresh implementations against the current TypeScript codebase (Custom timescale #961, Add order enforcement in stack process #854, Implements rowRenderer prop #850, Add onEndTimeChange event (#838) #845, limit item dragging between groups (improve moveResizeValidator via dragGroupDelta) #787, Item collision event #898).
3. 2 PRs are trivial bug fixes that should just be applied directly (check for parentNode before using #896, - Fixed the 'handleWheelZoom' function that zoomed in incorrectly #841).
4. 3 features from old PRs are already implemented in 0.30: itemVerticalGap (feat: add prop to remove vertical margin between stacked items #889), dayjs migration (Replace moment with datedriver. #819), SCSS customization (Enable Style Customization #659), and componentWillReceiveProps removal (Remove componentWillReceiveProps warning. #651).

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See also: Issue Triage Summary for the companion review of all 20 open issues.

[lnagel]

@Ilaiwi @developer-ocansey @madisvain Sharing some initial results on the PR triage.