export interface VerticalState {
    topPosition: number;
    topProgress: number;
    bottomProgress: number;
    ahead: boolean;
    entering: boolean;
    inside: boolean;
    contained: boolean;
    exiting: boolean;
    behind: boolean;
}
export declare const verticalState: (domElement: HTMLElement, container?: HTMLElement | Window, marginTop?: number, marginBottom?: number) => VerticalState;
export declare const getTopPosition: (domElement: HTMLElement, boundary?: HTMLElement | Window) => number;
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