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fix: Grid suggestion menu width overflows viewport (BLO-1361) - #3096

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@matthewlipski

@matthewlipski matthewlipski commented Sep 17, 2026 •

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Summary

This PR fixes the emoji picker/grid suggestion menu width overflowing in small viewports. It's based on #3082 but changes the width constraint to be set using CSS instead of FloatingUI's size middleware, to match how it's done in the regular suggestion menu. I've made a new PR as I don't have permissions to push to the original branch.

Thanks to @Ishkirat-Singh for his original PR!

Closes #3078

Rationale

This is a bug.

Changes

  • Updated CSS

Impact

N/A

Testing

N/A

Screenshots/Video

N/A

Checklist

  • Code follows the project's coding standards.
  • Unit tests covering the new feature have been added.
  • All existing tests pass.
  • The documentation has been updated to reflect the new feature

Additional Notes

N/A

Summary by CodeRabbit

  • Bug Fixes
    • Prevented horizontal scrolling in suggestion menus from chaining to surrounding containers across supported themes.
    • Improved overflow handling so menus correctly respond when content extends beyond the left or right edge of the available space.
    • Preserved vertical overflow behavior while providing more accurate horizontal overflow detection.

Ishkirat-Singh and others added 3 commits September 10, 2026 05:33
The emoji picker is rendered as a fixed number of columns, so on narrow
viewports it was wider than the screen: the right-hand columns were cut off
and the menu only scrolled vertically. Cap the floating element's width to
the space floating-ui reports as available, the same way its height is
already capped, and let the grid scroll horizontally when the columns do
not fit.

Fixes #3078
With max-width capped to the available width, content-box sizing let the
padding push the menu past the cap, and the shadcn min-w-32 kept it from
shrinking on very narrow viewports.
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📒 Files selected for processing (3)
  • packages/ariakit/src/style.css
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  • packages/shadcn/src/suggestionMenu/gridSuggestionMenu/GridSuggestionMenu.tsx
🚧 Files skipped from review as they are similar to previous changes (2)
  • packages/shadcn/src/suggestionMenu/gridSuggestionMenu/GridSuggestionMenu.tsx
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📝 Walkthrough

Walkthrough

Grid suggestion menus now prevent horizontal scroll chaining in Ariakit, Mantine, and Shadcn styles. elementOverflow now reports horizontal overflow direction when vertical overflow is absent.

Changes

Grid suggestion menu overflow

Layer / File(s) Summary
Horizontal overscroll prevention
packages/ariakit/src/style.css, packages/mantine/src/blocknoteStyles.css, packages/shadcn/src/suggestionMenu/gridSuggestionMenu/GridSuggestionMenu.tsx
The grid menu styles and root class now disable horizontal scroll chaining while retaining horizontal scrolling.
Horizontal overflow detection
packages/react/src/util/elementOverflow.ts
elementOverflow reports left, right, or both for horizontal overflow when vertical overflow is absent. Vertical overflow remains preferred.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (2 skipped: 2 … Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly identifies the primary fix: preventing the grid suggestion menu from overflowing the viewport. It is concise and specific.
Description check ✅ Passed The description includes all template sections and explains the issue, rationale, implementation, impact, testing status, and checklist. Testing and documentation are marked as not added, which is acc…
Linked Issues check ✅ Passed The implementation meets issue #3078. The grid suggestion menus constrain width and enable horizontal access to content on narrow viewports. The current changes add overscroll-behavior-x: none for t…
Out of Scope Changes check ✅ Passed The changes remain within issue #3078. The CSS declarations prevent horizontal scroll chaining in the affected emoji grid menus. The elementOverflow update supports horizontal overflow handling. No …
Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (2 skipped: 2 unsupported.)

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Actionable comments posted: 2


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
In `@packages/ariakit/src/style.css`:
- Around line 160-162: Update the elementOverflow helper used by
GridSuggestionMenuItem to detect horizontal as well as top and bottom overflow,
including left and right bounds, so off-screen columns trigger the existing
scrollIntoView({ block: "nearest" }) behavior.
- Around line 160-162: Update the Ariakit, Mantine, and Shadcn grid menu root
styles to constrain width to the available floating or portal container, rather
than only the viewport; preserve the existing overflow behavior and apply the
equivalent available-width rule consistently across all three roots.

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📒 Files selected for processing (3)
  • packages/ariakit/src/style.css
  • packages/mantine/src/blocknoteStyles.css
  • packages/shadcn/src/suggestionMenu/gridSuggestionMenu/GridSuggestionMenu.tsx

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Comment thread packages/ariakit/src/style.css
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commit: 4ae1e56

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@YousefED

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While it looks like this improves the emoji experience on small screens, it's still pretty flaky when testing on mobile Android.

Maybe we can take it one step further? (Could be that we need some of the portal fixes from the other stack first)

@matthewlipski

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While it looks like this improves the emoji experience on small screens, it's still pretty flaky when testing on mobile Android.

Maybe we can take it one step further? (Could be that we need some of the portal fixes from the other stack first)

Nah was just an issue with overscroll, fixed now

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Image

I think a better solution would be to not have a horizontal scrollbar here at all, and maybe use a full-width sheet on mobile. Would be worth some UX research of other apps. Also ok to change into a follow-up task.

Also, @nperez0111 is changing the emoji implementation, not sure if this is affected

: bottomOverflow
? "bottom"
: "none";
: horizontalOverflow;

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this returns "both" two different cases, so consumers can't distinguish between them.

Afaik we only check for "none", so it's better to change this function to a boolean isElementOverflowing.

Or, go one step further and see if we can just call https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoViewIfNeeded or https://github.com/scroll-into-view/scroll-into-view-if-needed, but not sure if any of these are a 1:1 fit and actually better, so needs some research

@nperez0111

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It's a good question, since we are switching the emoji implementation to frimousse, we actually can just completely drop this grid suggestions menu component. I can't imagine many people were integrating it, so maybe we should just drop it altogether? Opinions? Is it used anywhere else that I might not be aware of?

@matthewlipski

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Possible but I'd say unlikely that people were using it to implement their own grid suggestion menus. I would guess that people are using the regular suggestion menu >90% of the time instead, so I'm ok with dropping it. Just note that technically it will be a regression.

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Agree with Matthew, it's ok to remove it if we don't need it.

What I'm curious about first is whether the frimousse implementation actually replaces the GridSuggestionMenu, and how? Our Suggestion and Grid SuggestionMenu are pretty text-editor specific components, as they keep focus on the editor, but still allow you to navigate with arrow-keys (in that sense they're sort of like a combobox (https://ariakit.com/components/combobox https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Reference/Roles/combobox_role)

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Emoji picker overflows the viewport on narrow screens and can't be scrolled horizontally

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