import * as React from 'react';
import { SelectCallback } from '@restart/ui/types';
import { BsPrefixProps, BsPrefixRefForwardingComponent } from '../utils/helpers';
import { Size } from '../utils/types';
export interface NavbarProps extends BsPrefixProps, Omit<React.HTMLAttributes<HTMLElement>, 'onSelect'> {
    /**
     * The breakpoint, below which, the Navbar will collapse.
     * When `true` the Navbar will always be expanded regardless of screen size.
     */
    expand?: boolean | Size;
    /**
     * Sets the background colour of navbar. A convenience prop for adding `bg-*` utility classes since they are so commonly used here.
     * `light` and `dark` are common choices but any `bg-*` class is supported, including any custom ones you might define.
     *
     * Pairs nicely with the `variant` prop.
     */
    bg?: string;
    /**
     * Create a fixed navbar along the top or bottom of the screen, that scrolls with the
     * page. A convenience prop for the `fixed-*` positioning classes.
     */
    fixed?: 'top' | 'bottom';
    /**
     * Position the navbar at the top of the viewport, but only after scrolling past it.
     * A convenience prop for the `sticky-top` positioning class.
     *
     *  __Not supported in <= IE11 and other older browsers without a polyfill__
     */
    sticky?: 'top';
    /**
     * A callback fired when the `<Navbar>` body collapses or expands. Fired when
     * a `<Navbar.Toggle>` is clicked and called with the new `expanded`
     * boolean value.
     *
     * @controllable expanded
     */
    onToggle?: (expanded: boolean) => void;
    /**
     * A callback fired when a descendant of a child `<Nav>` is selected.
     *
     * ```js
     * function (
     *  eventKey: mixed,
     *  event?: SyntheticEvent
     * )
     * ```
     */
    onSelect?: SelectCallback;
    /** When true and in hamburger state, the Navbar collapses on selection of its items' */
    collapseOnSelect?: boolean;
    /** When true and in hamburger state, Navbar body is visible */
    expanded?: boolean;
    /** When true adds a border-bottom to Navbar   */
    hasBorderBottom?: boolean;
}
declare const _default: BsPrefixRefForwardingComponent<"nav", NavbarProps> & {
    Brand: BsPrefixRefForwardingComponent<"a", import("./NavbarBrand").NavbarBrandProps>;
    Collapse: React.ForwardRefExoticComponent<import("./NavbarCollapse").NavbarCollapseProps & React.RefAttributes<HTMLDivElement>>;
    Text: BsPrefixRefForwardingComponent<"span", BsPrefixProps<React.ElementType<any>>>;
    Toggle: BsPrefixRefForwardingComponent<"button", import("./NavbarToggle").NavbarToggleProps>;
};
export default _default;