📦 deps(thirdparty): update snapshots
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# View Transitions in Next.js
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## Setup
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`<ViewTransition>` works out of the box for `startTransition`/`Suspense` updates. To also animate `<Link>` navigations:
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```js
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// next.config.js
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const nextConfig = {
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experimental: { viewTransition: true },
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};
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module.exports = nextConfig;
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```
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This wraps every `<Link>` navigation in `document.startViewTransition`. Any VT with `default="auto"` fires on **every** link click — use `default="none"` to prevent competing animations.
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Do **not** install `react@canary` — see SKILL.md "Availability" for details.
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---
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## Next.js Implementation Additions
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When following `implementation.md`, apply these additions:
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**After Step 2:** Enable the experimental flag above.
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**Step 4:** Use `transitionTypes` on `<Link>` — see "The `transitionTypes` Prop" section below for usage and availability.
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**After Step 6:** For same-route dynamic segments (e.g., `/collection/[slug]`), use the `key` + `name` + `share` pattern — see Same-Route Dynamic Segment Transitions below.
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---
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## Layout-Level ViewTransition
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**Do NOT add a layout-level VT wrapping `{children}` if pages have their own VTs.** Nested VTs never fire enter/exit when inside a parent VT — page-level enter/exit will silently not work. Remove the layout VT entirely.
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A bare `<ViewTransition>` in layout works only if pages have **no** VTs of their own.
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**Layouts persist across navigations** — `enter`/`exit` only fire on initial mount, not on route changes. Don't use type-keyed maps in layouts.
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---
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## The `transitionTypes` Prop on `next/link`
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No wrapper component needed, works in Server Components:
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```tsx
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<Link href="/products/1" transitionTypes={['transition-to-detail']}>View Product</Link>
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```
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Replaces the manual pattern of `onNavigate` + `startTransition` + `addTransitionType` + `router.push()`. Reserve manual `startTransition` for non-link interactions (buttons, forms).
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**Availability:** `transitionTypes` requires `experimental.viewTransition: true` and is available in Next.js 15+ canary builds and Next.js 16+. If unavailable, use `startTransition` + `addTransitionType` + `router.push()` (see Programmatic Navigation below). To check: `grep -r "transitionTypes" node_modules/next/dist/` — if no results, fall back to programmatic navigation.
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---
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## Programmatic Navigation
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```tsx
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'use client';
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import { useRouter } from 'next/navigation';
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import { startTransition, addTransitionType } from 'react';
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function handleNavigate(href: string) {
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const router = useRouter();
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startTransition(() => {
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addTransitionType('nav-forward');
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router.push(href);
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});
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}
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```
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---
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## Server-Side Filtering with `router.replace`
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For search/sort/filter that re-renders on the server (via URL params), use `startTransition` + `router.replace`. VTs activate because the state update is inside `startTransition`:
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```tsx
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'use client';
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import { useRouter } from 'next/navigation';
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import { startTransition } from 'react';
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function handleSort(sort: string) {
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const router = useRouter();
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startTransition(() => {
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router.replace(`?sort=${sort}`);
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});
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}
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```
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List items wrapped in `<ViewTransition key={item.id}>` will animate reorder. This is the server-component alternative to the client-side `useDeferredValue` pattern in `patterns.md`.
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---
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## Two-Layer Pattern (Directional + Suspense)
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Directional slides + Suspense reveals coexist because they fire at different moments. Place the directional VT in the **page component** (not layout):
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```tsx
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<ViewTransition
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enter={{ "nav-forward": "slide-from-right", default: "none" }}
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exit={{ "nav-forward": "slide-to-left", default: "none" }}
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default="none"
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>
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<div>
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<Suspense fallback={<ViewTransition exit="slide-down"><Skeleton /></ViewTransition>}>
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<ViewTransition enter="slide-up" default="none"><Content /></ViewTransition>
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</Suspense>
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</div>
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</ViewTransition>
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```
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---
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## `loading.tsx` as Suspense Boundary
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Next.js `loading.tsx` is an implicit `<Suspense>` boundary. Wrap the skeleton in `<ViewTransition exit="...">` in `loading.tsx`, and the content in `<ViewTransition enter="..." default="none">` in the page:
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```tsx
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// loading.tsx
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<ViewTransition exit="slide-down"><PhotoGridSkeleton /></ViewTransition>
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// page.tsx
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<ViewTransition enter="slide-up" default="none"><PhotoGrid photos={photos} /></ViewTransition>
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```
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Same rules as explicit `<Suspense>`: use simple string props (not type maps) since Suspense reveals fire without transition types.
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---
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## Shared Elements Across Routes
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```tsx
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// List page
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{products.map((product) => (
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<Link key={product.id} href={`/products/${product.id}`} transitionTypes={['nav-forward']}>
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<ViewTransition name={`product-${product.id}`}>
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<Image src={product.image} alt={product.name} width={400} height={300} />
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</ViewTransition>
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</Link>
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))}
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// Detail page — same name
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<ViewTransition name={`product-${product.id}`}>
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<Image src={product.image} alt={product.name} width={800} height={600} />
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</ViewTransition>
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```
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---
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## Same-Route Dynamic Segment Transitions
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When navigating between dynamic segments of the same route (e.g., `/collection/[slug]`), the page stays mounted — enter/exit never fire. Use `key` + `name` + `share`:
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```tsx
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<Suspense fallback={<Skeleton />}>
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<ViewTransition key={slug} name={`collection-${slug}`} share="auto" default="none">
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<Content slug={slug} />
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</ViewTransition>
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</Suspense>
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```
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- `key={slug}` forces unmount/remount on change
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- `name` + `share="auto"` creates a shared element crossfade
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- VT inside `<Suspense>` (without keying Suspense) keeps old content visible during loading
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---
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## Server Components
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- `<ViewTransition>` works in both Server and Client Components
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- `<Link transitionTypes>` works in Server Components — no `'use client'` needed
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- `addTransitionType` and `startTransition` for programmatic nav require Client Components
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