v10.9.0

10.9.0 (2026-08-03)

This new release brings a feature that was requested by SlickGrid's users for many years, we now bring Variable Row Height support (thanks to Ben (aka 6pac), for his promo access to Claude Fable 🤖). This feature does have some small perf impact (e.g. scroll position must be calculated differently) and is opt-in, so you will need to enable it yourself and you have 2 possible ways of defining variable row height (see both examples below)

1. rowHeightProvider grid option
2. item metadata height property

Platform	Demo	Docs
Angular-Slickgrid	Example 56 - provider / Example 57 - metadata	Variable Row Height - docs
Aurelia-Slickgrid	Example 56 - provider / Example 57 - metadata	Variable Row Height - docs
Slickgrid-React	Example 56 - provider / Example 57 - metadata	Variable Row Height - docs
Slickgrid-Vue	Example 56 - provider / Example 57 - metadata	Variable Row Height - docs
vanilla	Example 44 - provider / Example 45 - metadata	Variable Row Height - docs

Secondly, this release also brings a bunch of Row Detail fixes and also a new keepComponentAlive option (available as opt-in feature on all 4 supported frameworks). This new option is now being used in all framework repos via Example 45, you can also read the updated Row Detail docs for it.

Platform	Demo	Docs
Angular-Slickgrid	Example 45	Row Detail - docs
Aurelia-Slickgrid	Example 45	Row Detail - docs
Slickgrid-React	Example 45	Row Detail - docs
Slickgrid-Vue	Example 45	Row Detail - docs

Features

• add keepComponentAlive to all 4 framework Row Detail plugins (#2653) (37d3238) - by @ghiscoding
• core: add variable row height support (#2650) (fd5d3e2) - by @ghiscoding
• onBeforeCellEdit hook for RowBasedEditing plugin (#2646) (a893dca) - by @zewa666

Bug Fixes

• a11y: add aria-expanded to Row Detail (#2656) (2eb9242) - by @ghiscoding
• core: compute scrollTo page before deriving the paging offset (#2644) (a944424) - by @ghiscoding
• core: probe positioned-child limit in getMaxSupportedCssHeight (#2645) (c03bf1f) - by @ghiscoding
• deps: update all non-major dependencies (#2692) (cab9a82) - by @ghiscoding
• deps: update dependency autocompleter to v10 (#2652) (b977768) - by @renovate-bot
• exports: add new variable row height to Excel/PDF Export Services (#2677) (66d8876) - by @ghiscoding
• footer-row lifecycle - construction crash, inconsistent getFooterRow, double onFooterRowCellRendered (#2672) (1dddad1) - by @ghiscoding
• frozen-bottom grids never clean up off-screen row cells (#2668) (a5720a4) - by @ghiscoding
• frozen-bottom hit testing resolves the wrong row when data is shorter than the viewport (#2673) (656fe48) - by @ghiscoding
• regression: prevent row selection from being dropped when last column is hidden (#2648) (f90a1de) - by @Heimo001
• Row Detail keepComponentAlive duplicates and render race timing issue (#2655) (4dff5d6) - by @ghiscoding
• Row Detail newly expanded row shouldn't be re-rendered (#2667) (daeaf31) - by @ghiscoding
• styling: change default column resize handle width to 2px (6d7e990) - by @ghiscoding
• styling: Slider Editor must be aligned properly in Fluent Theme (b018db8) - by @ghiscoding
• styling: use "system-ui" as font-family for better OS native (046a25b) - by @ghiscoding
• updateRowPositions leaves right-pane row fragments at stale positions (#2676) (bd98c6c) - by @ghiscoding

Performance Improvements

• export: optimize Excel/PDF export variable row height handling (#2681) (ebf49f2) - by @ghiscoding

🎉 Another Slickgrid-Universal release 🤖 Love the project? Give it a star ⭐