/**
 * Declarative enter/leave/move transitions for the view layer.
 *
 * This is a thin declarative binding over the existing `motion` primitives —
 * it does not implement a second animation engine. Enter/leave keyframes run
 * through the Web Animations API (the same path `motion` uses), FLIP moves
 * delegate to `motion`'s `flip()` / `capturePosition()`, and every transition
 * honours the shared reduced-motion preference via `prefersReducedMotion()`.
 *
 * Authors attach transitions with plain companion attributes that the
 * structural directives (`bq-if`, `bq-show`, `bq-for`) read:
 *
 * ```html
 * <div bq-if="open" bq-transition="fade" bq-transition-duration="200">…</div>
 * <li bq-if="visible" bq-in="slide-up" bq-out="fade">…</li>
 * <li bq-for="item in items" bq-key="item.id" bq-animate="flip">…</li>
 * ```
 *
 * @module bquery/view
 * @since 1.15.0
 */
/**
 * Companion attributes consumed by structural directives to drive transitions.
 * The view pipeline treats these as passive (never warns about them and never
 * processes them as standalone directives).
 *
 * @internal
 */
export declare const TRANSITION_ATTRS: readonly ["transition", "transition-duration", "transition-easing", "in", "out", "animate"];
/** Resolved transition configuration for an element. */
export type ViewTransitionConfig = {
    /** Enter keyframes (hidden → visible), or `null` when no enter transition. */
    enter: Keyframe[] | null;
    /** Leave keyframes (visible → hidden), or `null` when no leave transition. */
    leave: Keyframe[] | null;
    /** Duration in milliseconds. */
    duration: number;
    /** CSS easing string. */
    easing: string;
};
/**
 * Reads the transition companion attributes from an element and resolves them
 * into enter/leave keyframes plus timing. Returns `null` when the element has
 * no transition attributes at all, so callers can take their synchronous path.
 *
 * @internal
 */
export declare const resolveTransition: (el: Element, prefix: string) => ViewTransitionConfig | null;
/**
 * Cancels any animations currently running on an element. Used to clear a
 * `fill: 'forwards'` leave animation before re-entering, and to avoid stacking
 * animations on rapid toggles. No-ops where `Element.getAnimations` is absent
 * (e.g. some test DOMs).
 *
 * @internal
 */
export declare const cancelTransitions: (el: Element) => void;
/**
 * Runs a keyframe transition on an element and resolves when it finishes.
 *
 * Resolves immediately (a no-op) when there are no keyframes, when the user
 * prefers reduced motion, or when the Web Animations API is unavailable — in
 * every such case the caller's commit logic still runs, so behaviour is
 * identical to having no transition.
 *
 * @param fill - `'none'` for enter (revert to natural styles afterwards),
 *   `'forwards'` for leave (hold the hidden end-state until the element is
 *   removed, preventing a visible flash).
 * @internal
 */
export declare const runTransition: (el: Element, keyframes: Keyframe[] | null, config: ViewTransitionConfig, fill: "none" | "forwards") => Promise<void>;
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