import type { CSSProperties, PropType, Ref } from 'vue';
declare const _default: import("vue").DefineComponent<{
    offsetTop: {
        type: NumberConstructor;
        default: number;
    };
    offsetBottom: {
        type: NumberConstructor;
    };
    target: {
        type: PropType<string | Window | HTMLElement>;
    };
    targetContainer: {
        type: PropType<string | Window | HTMLElement>;
    };
}, {
    wrapperRef: Ref<HTMLElement | undefined>;
    isFixed: Ref<boolean>;
    classNames: import("vue").ComputedRef<{
        [x: string]: boolean;
    }>;
    placeholderStyles: Ref<CSSProperties>;
    fixedStyles: Ref<CSSProperties>;
    updatePositionThrottle: {
        (...args: any[]): void;
        cancel(): void;
    };
}, unknown, {}, {
    updatePosition(): void;
}, import("vue").ComponentOptionsMixin, import("vue").ComponentOptionsMixin, {
    change: (fixed: boolean) => true;
}, string, import("vue").PublicProps, Readonly<import("vue").ExtractPropTypes<{
    offsetTop: {
        type: NumberConstructor;
        default: number;
    };
    offsetBottom: {
        type: NumberConstructor;
    };
    target: {
        type: PropType<string | Window | HTMLElement>;
    };
    targetContainer: {
        type: PropType<string | Window | HTMLElement>;
    };
}>> & {
    onChange?: ((fixed: boolean) => any) | undefined;
}, {
    offsetTop: number;
}, {}>;
export default _default;