import { Frame } from './metal/index';
import { SpanielTrackedElement, DOMString, IntersectionObserverInit, DOMMargin, InternalIntersectionObserverEntry } from './interfaces';
export declare class SpanielIntersectionObserver implements IntersectionObserver {
    private scheduler;
    private callback;
    root: SpanielTrackedElement | null;
    rootMargin: DOMString;
    protected rootMarginObj: DOMMargin;
    thresholds: number[];
    private records;
    observe(target: HTMLElement): string;
    private onTick;
    unobserve(target: SpanielTrackedElement): void;
    disconnect(): void;
    takeRecords(): IntersectionObserverEntry[];
    private generateEntryEvent;
    constructor(callback: Function, options?: IntersectionObserverInit);
}
export declare function generateEntry(frame: Frame, clientRect: ClientRect, el: HTMLElement, rootMargin: DOMMargin): InternalIntersectionObserverEntry;