type PulseAnimationOptions = {
    step?: number;
    on_tick?: () => void;
    element?: () => Element | null | undefined;
};
type PulseAnimation = {
    readonly time: number;
    readonly unit: number;
};
export declare const pulsing_highlight_opacity: (pulse_unit: number) => number;
export declare function create_pulse_animation(active: () => boolean, { step, on_tick, element }?: PulseAnimationOptions): PulseAnimation;
export {};