Piyush Yadav b8d28b36d9 fix(ui-patterns): prevent duplicate horizontal scrollbar in MultipleCodeBlock (#49940)
## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Bug fix

## What is the current behavior?

Fixes #49903

In `ConnectSheet` (e.g., Next.js -> Step 2 "Add files"), multi-file
instructions render using `MultipleCodeBlock`.
The `TabsContent` container in
`packages/ui-patterns/src/MultipleCodeBlock/index.tsx` was styled with
`className="... overflow-scroll ..."`.
The CSS property `overflow-scroll` forces both horizontal and vertical
scrollbar tracks to be rendered regardless of whether horizontal content
overflows.
Because the child `<CodeBlock>` already manages its own horizontal
overflow (`overflow-auto`) and fills the container width, `TabsContent`
displayed a frozen/disabled horizontal scrollbar at the top level. When
scrolling down vertically to the bottom of the code snippet,
`<CodeBlock>`'s real horizontal scrollbar came into view, resulting in
inconsistent and duplicate scrollbars.

## What is the new behavior?

- Replaced `overflow-scroll` with `overflow-y-auto` on `TabsContent` in
`MultipleCodeBlock`.
- `TabsContent` cleanly scrolls vertically when content height exceeds
`max-h-72`.
- Eliminates the duplicate/disabled top-level horizontal scrollbar.
- Horizontal code scrolling is cleanly delegated to `<CodeBlock>` only
when lines exceed the available width.
- Added a unit test in
`packages/ui-patterns/src/MultipleCodeBlock/index.test.tsx` verifying
`TabsContent` applies `overflow-y-auto` rather than `overflow-scroll`.

## Additional context

Verified locally:
- `vitest run src/MultipleCodeBlock/index.test.tsx` (all tests passing)
- `tsc --noEmit` in `packages/ui-patterns` (0 type errors)
- `prettier --check` against modified files (passed)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
  * Improved code block scrolling to use vertical scrolling only.
* Prevented unnecessary horizontal scrollbars in multi-file code
examples.
  * Added coverage to verify the updated scrolling behavior.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-09-03 16:29:36 +10:00
2026-08-24 10:06:36 -06:00
2025-06-17 11:08:46 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00

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