fix(ui): file tree scroll position is stable when browsing

[jhroemer]

🔗 Linked issue

#2286

🧭 Context

Currently browsing the code view can be somewhat annoying, since the scroll position resets on navigation.

📚 Description

It's just nice that scroll position is stable when clicking around :-)

The fix:

• adds a ref to the scrollable aside
• saves the scroll position (w. useState ) before unmounting
• sets the scroll position when the aside is re-rendered
• edit: pushed an update, so that now the scroll position is only saved when you're navigating within the same package+version

As far as I can see on the Nuxt docs flush: 'post'; is good practice when you want to watch the DOM, but I rarely touch Vue code so would appreciate feedback. Same goes for the useState composable, it's the first time I'm using it 😄 But the main part is that the state should persist across navigation.

Regarding testing: I would personally not get into testing scroll position. I've done this in the past which caused lots of flaky tests.

package-code-view-scroll-fix.mov

I did not find PRs that directly overlap. I did find this one but it's not the same thing + I believe it would be complimentary.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Mar 27, 2026 8:28am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Mar 27, 2026 8:28am
npmx-lunaria	Ignored		Mar 27, 2026 8:28am

[coderabbitai]

📝 Walkthrough

Walkthrough

The page component persists the file-tree sidebar’s vertical scroll per package/version. It adds a template ref file-tree-sidebar, saves the sidebar element’s scrollTop into a shared useState keyed by ${packageName}@${version} on onBeforeUnmount, and restores that scrollTop once on mount using a one-time watcher with flush: 'post'. The sidebar <aside> template now includes the new ref.

Suggested labels

needs review

Suggested reviewers

• danielroe
• graphieros

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Description check	✅ Passed	The pull request description clearly relates to the changeset, detailing the scroll position persistence feature and implementation approach.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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[coderabbitai]

Actionable comments posted: 1

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: c8c1d70c-6026-4a1a-bb36-b59cca79e631

📥 Commits

Reviewing files that changed from the base of the PR and between 3186091 and c5b0b66.

📒 Files selected for processing (1)

• app/pages/package-code/[[org]]/[packageName]/v/[version]/[...filePath].vue