export declare const triggerRunCallback: (sufficient: boolean) => boolean;
export declare const observeBoosterButton: (selector: string, callback: EventListenerOrEventListenerObject) => void;
export declare const updateBoosterLayerMessage: (layerEl: HTMLElement, id: string) => void;
export declare const setupBoosterLayer: (layerEl: HTMLElement, supportedBrowser: boolean) => void;
export declare const initReducedView: () => void;
export declare const hasBatteryPerformanceIssue: (videoBlob: Blob) => Promise<void>;
export declare const waitForVisibilty: () => Promise<unknown>;
/**
 * Checking whether a video can be played.
 * This check is for IOS and checks if the power saving mode is enabled.
 *
 * In this case no video will be played automatically and play throws an error.
 */
export declare const canVideoPlay: (blob: Blob) => Promise<void>;
export declare const deprecationWarningButtonSelector: (initApp: CallableFunction) => void;
export declare function createFallbackInit(duration: number): Promise<unknown>;
export declare function createInitElement({ duration }: {
    duration: number;
} | undefined, callback: CallableFunction): void;