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Choose the router setup for your Angular app
Use the configuration that matches how your application registers routes. Both options enable Angular Router’s integration with the browser View Transitions API.
| Application setup | Router configuration |
|---|---|
Standalone bootstrap using provideRouter |
Add withViewTransitions() to the router features. |
NgModule using RouterModule.forRoot |
Set enableViewTransitions: true in the router options. |
See Angular’s Route transition animations guide for the configuration syntax and current API details.
What happens during a route transition
The browser’s transition wraps route activation. Angular prepares navigation, then activates and deactivates routes within the browser transition callback; the transition completes after rendering. This does not mean Angular waits for every later piece of page content to load. As Angular’s guide puts it, “Angular Router does not provide a way to delay view transitions.” Keep the route change responsive and avoid relying on asynchronously loaded content being part of the captured transition.
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Connect a shared element across routes
To make an item appear to move between two route views, assign the same view-transition-name to its old and new DOM elements. Then style the browser’s transition snapshots with the corresponding pseudo-elements:
::view-transition-old(shared-item) {
/* style the outgoing snapshot */
}
::view-transition-new(shared-item) {
/* style the incoming snapshot */
}Replace shared-item with the shared name used on both elements. Put these rules in a global stylesheet: Angular’s component style encapsulation prevents component-scoped rules from correctly targeting the view-transition pseudo-elements. Angular documents this pattern in its route transition guide.
Make transitions depend on navigation details
For navigation-aware behavior, use the router’s onViewTransitionCreated callback. It receives the browser ViewTransition and route snapshots, so application code can inspect the navigation and decide whether to customize or skip animation. Angular’s guide demonstrates skipping the animation when a change affects only the URL fragment or query parameters; navigation itself still completes normally.
Choose route transitions or element animations
Use the mechanism that matches what is changing:
- Router View Transitions: visual continuity between route states, including shared elements across different DOM elements.
animate.enterandanimate.leave: effects for elements entering or leaving the DOM within a view. These APIs apply CSS classes and support event bindings that can call animation functions or third-party libraries.
These are distinct scopes: Router transitions concern the change between views, while enter/leave animations concern an element’s lifecycle. Angular’s current guidance covers enter and leave animations. The older transition API is deprecated since v20.2, and Angular’s API documentation says removal is intended in v23; consult the transition API reference before using it in new code.
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Know the browser fallback
Router view transitions are a progressive enhancement. When the browser lacks the View Transitions API, Angular continues the navigation with ordinary DOM updates and no view-transition animation. The integration is currently labeled developer preview, so account for that status when deciding whether to make it a core part of a product’s interaction design.
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