import React, { RefObject, MouseEvent } from 'react';
import { PopoverProps } from 'reactstrap';
export declare enum HelpTrigger {
    HOVER = "hover",
    FOCUS = "focus",
    CLICK = "click",
    LEGACY = "legacy"
}
export interface HelpPopoverProps {
    help?: string | null | Node;
    icon?: string;
    helpPlacement?: PopoverProps['placement'];
    helpTrigger?: HelpTrigger;
    className?: string;
}
export declare class HelpPopover extends React.Component<HelpPopoverProps> {
    fieldId: string;
    button: RefObject<HTMLButtonElement>;
    constructor(props: HelpPopoverProps);
    focusOnClick: (e: MouseEvent<HTMLButtonElement>) => void;
    render(): JSX.Element | null;
    static displayName: string;
}