import * as React from "react";
import { AttachFileButtonProps } from "./AttachFileButton.definitions";
export declare class AttachFileButton extends React.PureComponent<AttachFileButtonProps> {
    inputRef: React.RefObject<HTMLInputElement>;
    private handleButtonClick;
    state: {
        isHovered: boolean;
    };
    static defaultProps: {
        multipleFiles: boolean;
        icon: string;
        sizeMultiplier: number;
    };
    handleMouseEnter: () => void;
    handleMouseLeave: () => void;
    render(): JSX.Element;
    onChange: (e: React.ChangeEvent) => Promise<void>;
}