expansion-animations.d.ts 1.8 KB

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  1. /**
  2. * @license
  3. * Copyright Google LLC All Rights Reserved.
  4. *
  5. * Use of this source code is governed by an MIT-style license that can be
  6. * found in the LICENSE file at https://angular.io/license
  7. */
  8. import { AnimationTriggerMetadata } from '@angular/animations';
  9. /** Time and timing curve for expansion panel animations. */
  10. export declare const EXPANSION_PANEL_ANIMATION_TIMING = "225ms cubic-bezier(0.4,0.0,0.2,1)";
  11. /**
  12. * Animations used by the Material expansion panel.
  13. *
  14. * A bug in angular animation's `state` when ViewContainers are moved using ViewContainerRef.move()
  15. * causes the animation state of moved components to become `void` upon exit, and not update again
  16. * upon reentry into the DOM. This can lead a to situation for the expansion panel where the state
  17. * of the panel is `expanded` or `collapsed` but the animation state is `void`.
  18. *
  19. * To correctly handle animating to the next state, we animate between `void` and `collapsed` which
  20. * are defined to have the same styles. Since angular animates from the current styles to the
  21. * destination state's style definition, in situations where we are moving from `void`'s styles to
  22. * `collapsed` this acts a noop since no style values change.
  23. *
  24. * In the case where angular's animation state is out of sync with the expansion panel's state, the
  25. * expansion panel being `expanded` and angular animations being `void`, the animation from the
  26. * `expanded`'s effective styles (though in a `void` animation state) to the collapsed state will
  27. * occur as expected.
  28. *
  29. * Angular Bug: https://github.com/angular/angular/issues/18847
  30. *
  31. * @docs-private
  32. */
  33. export declare const matExpansionAnimations: {
  34. readonly indicatorRotate: AnimationTriggerMetadata;
  35. readonly expansionHeaderHeight: AnimationTriggerMetadata;
  36. readonly bodyExpansion: AnimationTriggerMetadata;
  37. };