Fix jump when clicking tabs

[gregberge]

No description provided.

[linear]

RND-8463 Scroll jumps when changing tab in GBO

[changeset-bot]

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Latest commit: 23fa5e6

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[Copilot]

Pull Request Overview

This PR fixes an issue where clicking on tabs causes an unwanted page jump. The solution prevents unnecessary scrolling by tracking previous hash/pathname values and only scrolling when there are actual changes. Additionally, it prevents Next.js router from auto-scrolling when tabs are clicked.

Key changes:

• Added a usePrevious hook to track previous values of hash and pathname
• Modified scroll behavior to only trigger when hash or pathname actually changes
• Disabled automatic scroll behavior in the Next.js router when replacing tab URLs

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/gitbook/src/components/hooks/usePrevious.ts	New hook to track previous render values
packages/gitbook/src/components/hooks/useScrollPage.ts	Updated scroll logic to compare previous/current values and avoid unnecessary scrolling
packages/gitbook/src/components/DocumentView/Tabs/DynamicTabs.tsx	Disabled router scroll behavior when changing tabs and added scroll-margin to tab panels

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[github-actions]

Summary of the deployments:

Version	URL	Status
Vercel	https://gitbook-v2-qeysa7xzu-gitbook.vercel.app	✅
Cloudflare	https://33d1f28d-gitbook-open-v2-preview.gitbook.workers.dev	✅

Test content

Site	2v	2c
GitBook	https://gitbook-v2-qeysa7xzu-gitbook.vercel.app/url/gitbook.com/docs	https://33d1f28d-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.com/docs
E2E	https://gitbook-v2-qeysa7xzu-gitbook.vercel.app/url/gitbook.gitbook.io/test-gitbook-open	https://33d1f28d-gitbook-open-v2-preview.gitbook.workers.dev/url/gitbook.gitbook.io/test-gitbook-open

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Build	Status	Details	Updated (UTC)
customers-v2 (Inspect)	👍 Changes approved	1 changed	Oct 21, 2025, 3:47 PM
v2-cloudflare (Inspect)	✅ No changes detected	-	Oct 21, 2025, 3:51 PM
v2-vercel (Inspect)	👍 Changes approved	2 changed	Oct 21, 2025, 3:50 PM