import type { DrawerProps as AntDrawerProps } from 'antd';
export declare const calcNewSize: (placement: AntDrawerProps['placement'], prev: any, next: any) => {
    size: any;
    attribute: string;
} | {
    size?: undefined;
    attribute?: undefined;
};
export declare const getSize: (placement: AntDrawerProps['placement'], e: any) => number;
export declare const isTriggerArea: (placement: AntDrawerProps['placement'], e: any) => boolean;