feat: add View Transitions API support for client-side navigation#3708
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Integrates the View Transitions API into Fresh's existing partials
system. When enabled via the `f-view-transition` attribute, partial
updates are wrapped in `document.startViewTransition()` for smooth
animated transitions between pages.
Usage:
<body f-client-nav f-view-transition>
The API is opt-in and progressive:
- Only activates when `f-view-transition` attribute is present
- Falls back to regular updates when the View Transitions API
is not supported by the browser
- Works with all navigation types: link clicks, popstate, and
form submissions
Users can customize animations via standard CSS:
::view-transition-old(root) { animation: ... }
::view-transition-new(root) { animation: ... }
Supersedes #1532
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Tests cover: - View transitions called when f-view-transition is present - View transitions NOT called without f-view-transition - View transitions NOT called when f-view-transition="false" - View transitions work with popstate (back/forward) navigation Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
4 tasks
Documents the f-view-transition attribute, how to enable it, customize animations with CSS, and disable it. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Extract the View Transitions section from partials.md into its own page with expanded content: per-element transitions, direction-aware animations, browser support. Replace inline section with cross-link. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Keep main's new tests and append view transition tests after them. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
f-view-transitionattribute, progressive enhancement (falls back gracefully)document.startViewTransition()Usage
Customize animations with standard CSS:
Per-element transitions work via
view-transition-name:Design decisions
f-view-transitionattribute is present, can be disabled withf-view-transition="false"Supersedes #1532
Closes #3458
Test plan
f-view-transitionis presentf-view-transitionf-view-transition="false"🤖 Generated with Claude Code