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