feat(site): preserve scroll position on framework switch (pagereveal)#608
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feat(site): preserve scroll position on framework switch (pagereveal)#608
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Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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📦 Bundle Size Report
Total: 39.71 kB · 0 B · 0% Entry BreakdownSubpath sizes are the additional bytes on top of the root entry point, measured by bundling root + subpath together and subtracting the root-only size.
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| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
. |
3.10 kB | 3.10 kB | 0 B | 0% | ✅ |
./dom |
2.58 kB | 2.58 kB | 0 B | 0% | ✅ |
| total | 5.68 kB | 5.68 kB | 0 B | 0% |
@videojs/element
| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
. |
817 B | 817 B | 0 B | 0% | ✅ |
./context |
823 B | 823 B | 0 B | 0% | ✅ |
| total | 1.60 kB | 1.60 kB | 0 B | 0% |
@videojs/icons
| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
./react |
2.10 kB | 2.10 kB | 0 B | 0% | ✅ |
./html |
1.37 kB | 1.37 kB | 0 B | 0% | ✅ |
| total | 3.46 kB | 3.46 kB | 0 B | 0% |
@videojs/react
| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
. |
7.69 kB | 7.69 kB | 0 B | 0% | ✅ |
./audio |
266 B | 266 B | 0 B | 0% | ✅ |
./background |
268 B | 268 B | 0 B | 0% | ✅ |
./video |
7.72 kB | 7.72 kB | 0 B | 0% | ✅ |
| total | 15.92 kB | 15.92 kB | 0 B | 0% |
@videojs/store
| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
. |
1.29 kB | 1.29 kB | 0 B | 0% | ✅ |
./html |
468 B | 468 B | 0 B | 0% | ✅ |
./react |
199 B | 199 B | 0 B | 0% | ✅ |
| total | 1.94 kB | 1.94 kB | 0 B | 0% |
@videojs/utils
| Entry | Base | PR | Diff | % | |
|---|---|---|---|---|---|
./array |
104 B | 104 B | 0 B | 0% | ✅ |
./dom |
684 B | 684 B | 0 B | 0% | ✅ |
./events |
227 B | 227 B | 0 B | 0% | ✅ |
./function |
197 B | 197 B | 0 B | 0% | ✅ |
./object |
119 B | 119 B | 0 B | 0% | ✅ |
./predicate |
265 B | 265 B | 0 B | 0% | ✅ |
./string |
110 B | 110 B | 0 B | 0% | ✅ |
./style |
185 B | 185 B | 0 B | 0% | ✅ |
./time |
478 B | 478 B | 0 B | 0% | ✅ |
./number |
158 B | 158 B | 0 B | 0% | ✅ |
| total | 2.47 kB | 2.47 kB | 0 B | 0% |
ℹ️ How to interpret
Sizes are minified + brotli, measured with esbuild.
Package totals are computed as root size + marginal subpath costs.
Subpath marginal cost = (root + subpath bundled together) − root alone.
| Icon | Meaning |
|---|---|
| ✅ | No change |
| 🔺 | Increased ≤ 10% |
| 🔴 | Increased > 10% |
| 🔽 | Decreased |
| 🆕 | New (no baseline) |
Run pnpm size locally to check current sizes.
Base UI's Select transfers html.scrollTop to body.scrollTop during its scroll lock, so window.scrollY reads as 0 while the dropdown is open. Detect the lock via data-base-ui-scroll-locked and read body.scrollTop instead. Also normalize trailing slashes in URL comparison. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
Preserves scroll position when switching frameworks (React ↔ HTML) on docs pages where the slug stays the same. Uses the existing native view transition infrastructure (
pagereveal/pageswapevents) that sidebar scroll restoration already relies on.{ url, scrollY }tosessionStoragefrom the React call sitespagerevealhandler (fires before the new page is revealed), restores scroll position if the URL matchesBake-off companion: #609 (ClientRouter approach)
Closes #484
Approach: Why
pagereveal?The
@view-transition { navigation: auto }CSS (already inDocsSidebarRestoration.astro) makes the browser hold a screenshot of the old page while the new page loads. Thepagerevealevent fires before the screenshot is swapped out, so restoringwindow.scrollYhere is flicker-free — the same mechanism sidebar restoration uses today.Changes
DocsSidebarRestoration.astropagerevealhandler to not early-return when sidebar is absent; added page scroll restoration fromsessionStorageSelectors.tsxsessionStoragebeforewindow.location.replace()JSPickerClient.tsxTest plan
pnpm dev, navigate to a docs page, scroll to middle, switch framework via sidebar dropdown → scroll preserved, no flicker🤖 Generated with Claude Code