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ECC/pi/core/skills/angular-developer/references/route-animations.md
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Affaan MustafaandGitHub c70874fae9 feat(pi): curated pi/core skills+prompts profile, CI load test, and 2.2.2 release sync (#3264)
Adds a curated, Pi-native, skills+prompts-only profile at pi/core/ for downstream packagers that mirror GitHub Releases.

- manifests/pi-core.json: explicit include lists, per-item exclusion reasons, curation rules, safety allowlists; every root skill and command must be classified.
- scripts/build-pi-core.js regenerates pi/core deterministically (package.json from VERSION, LICENSE, README.md, CURATION.md, skills/, commands/); --check fails CI on drift. council is renamed ecc-council inside pi/core only.
- Safety checks: no callable endpoints outside the allowlist, no npx/curl|sh/pip install, no secrets, no absolute home paths, no symlinks, valid frontmatter, no duplicate names.
- CI: build + drift check and an offline Pi CLI load test of pi/core.
- Release: VERSION, package.json and pi/core/package.json at 2.2.2, CHANGELOG, tag-triggered release verification, and a two-week cadence in CONTRIBUTING.md.

pi/core: 123 of 293 skills and 24 of 94 commands; 35,006 characters of skill description text.
2026-09-29 20:24:05 -05:00

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Route Transition Animations

Angular Router supports the browser's View Transitions API for smooth visual transitions between routes.

Enabling View Transitions

Add withViewTransitions() to your router configuration.

provideRouter(routes, withViewTransitions());

This is a progressive enhancement. In browsers that don't support the API, the router will still work but without the transition animation.

How it Works

  1. Browser takes a screenshot of the old state.
  2. Router updates the DOM (activates new component).
  3. Browser takes a screenshot of the new state.
  4. Browser animates between the two states.

Customizing with CSS

Transitions are customized in global CSS files (not component-scoped CSS).

Use the ::view-transition-old() and ::view-transition-new() pseudo-elements.

/* Example: Cross-fade + Slide */
::view-transition-old(root) {
  animation: 90ms cubic-bezier(0.4, 0, 1, 1) both fade-out;
}
::view-transition-new(root) {
  animation: 210ms cubic-bezier(0, 0, 0.2, 1) 90ms both fade-in;
}

Advanced Control

Use onViewTransitionCreated to skip transitions or customize behavior based on the navigation context.

withViewTransitions({
  onViewTransitionCreated: ({transition, from, to}) => {
    // Skip animation for specific routes
    if (to.url === '/no-animation') {
      transition.skipTransition();
    }
  },
});

Best Practices

  • Global Styles: Always define transition animations in styles.css to avoid view encapsulation issues.
  • View Transition Names: Assign unique view-transition-name to elements that should transition smoothly across routes (e.g., a header image).