export declare type Import<T> = T | {
    default: T;
};
export declare enum DeferTiming {
    Mount = 0,
    Idle = 1,
    InViewport = 2
}
export declare type RequestIdleCallbackHandle = any;
export interface RequestIdleCallbackOptions {
    timeout: number;
}
export interface RequestIdleCallbackDeadline {
    readonly didTimeout: boolean;
    timeRemaining(): number;
}
export declare type RequestIdleCallback = (deadline: RequestIdleCallbackDeadline) => void;
export interface WindowWithRequestIdleCallback {
    requestIdleCallback(callback: RequestIdleCallback, opts?: RequestIdleCallbackOptions): RequestIdleCallbackHandle;
    cancelIdleCallback: ((handle: RequestIdleCallbackHandle) => void);
}