import{type PropertyValues,type TemplateResult}from'lit';import{LyraElement}from'../../../internal/lyra-element.js';export interface LyraIntersectionObserverEventMap{'lr-intersection':CustomEvent<Readonly<{entries:readonly IntersectionObserverEntry[];}>>;'lr-intersect':CustomEvent<{entry:IntersectionObserverEntry;}>;}
/**
* `<lr-intersection-observer>` — observes slotted targets entering or
* leaving a viewport and emits the native intersection entries without adding
* layout or requiring consumers to manage observer lifecycle.
*
* @customElement lr-intersection-observer
* @slot - Elements to observe.
* @event lr-intersect - Emitted once per native entry with `detail: { entry }`.
* @event lr-intersection - Compatibility batch event emitted once per callback with
* frozen `detail: { entries: readonly IntersectionObserverEntry[] }`; the detached bounded
* sequence retains native entry identities.
* @csspart base - The non-layout wrapper around the observed slot.
* @status stable
* @since 4.0.0
*/
export declare class LyraIntersectionObserver extends LyraElement<LyraIntersectionObserverEventMap>{static styles:import("lit").CSSResultGroup[];protected static readonly immutableEventDetails:readonly string[];protected static readonly identityEventDetailCollectionItems:Readonly<{'lr-intersection':readonly string[];}>;disabled:boolean;rootMargin:string;threshold:number|number[]|string;
/** Element root or mapped element-ID string. */
root:Element|string|null;intersectClass:string;
/** Stops observing each target after its first intersection. Consumed targets stay consumed
* across option-driven observer rebuilds and reconnects; setting `once` to false resets them. */
once:boolean;private observer?;private observerDocument?;private observerGeneration;private onceIntersectedTargets;connectedCallback():void;disconnectedCallback():void;adoptedCallback():void;protected updated(changed:PropertyValues):void;private onSlotChange;private disconnect;private observeTargets;render():TemplateResult;}declare global{interface HTMLElementTagNameMap{'lr-intersection-observer':LyraIntersectionObserver;}}