declare module "react-router" {
    // NOTE: many of these are re-exported by react-router-dom and
    // react-router-native, so when making changes, please be sure to update those
    // as well.
    declare export type Location = {
      pathname: string,
      search: string,
      hash: string,
      state?: any,
      key?: string
    };
  
    declare export type LocationShape = {
      pathname?: string,
      search?: string,
      hash?: string,
      state?: any
    };
  
    declare export type HistoryAction = "PUSH" | "REPLACE" | "POP";
  
    declare export type RouterHistory = {
      length: number,
      location: Location,
      action: HistoryAction,
      listen(
        callback: (location: Location, action: HistoryAction) => void
      ): () => void,
      push(path: string | LocationShape, state?: any): void,
      replace(path: string | LocationShape, state?: any): void,
      go(n: number): void,
      goBack(): void,
      goForward(): void,
      canGo?: (n: number) => boolean,
      block(
        callback: (location: Location, action: HistoryAction) => boolean
      ): void,
      // createMemoryHistory
      index?: number,
      entries?: Array<Location>
    };
  
    declare export type Match = {
      params: { [key: string]: ?string },
      isExact: boolean,
      path: string,
      url: string
    };
  
    declare export type ContextRouter = {|
      history: RouterHistory,
      location: Location,
      match: Match,
      staticContext?: StaticRouterContext
    |};
  
    declare export type GetUserConfirmation = (
      message: string,
      callback: (confirmed: boolean) => void
    ) => void;
  
    declare type StaticRouterContext = {
      url?: string
    };
  
    declare export class StaticRouter extends React$Component<{
      basename?: string,
      location?: string | Location,
      context: StaticRouterContext,
      children?: React$Node
    }> {}
  
    declare export class MemoryRouter extends React$Component<{
      initialEntries?: Array<LocationShape | string>,
      initialIndex?: number,
      getUserConfirmation?: GetUserConfirmation,
      keyLength?: number,
      children?: React$Node
    }> {}
  
    declare export class Router extends React$Component<{
      history: RouterHistory,
      children?: React$Node
    }> {}
  
    declare export class Prompt extends React$Component<{
      message: string | ((location: Location) => string | true),
      when?: boolean
    }> {}
  
    declare export class Redirect extends React$Component<{
      to: string | LocationShape,
      push?: boolean
    }> {}
  
    declare export class Route extends React$Component<{
      component?: React$ComponentType<*>,
      render?: (router: ContextRouter) => React$Node,
      children?: React$ComponentType<ContextRouter> | React$Node,
      path?: string,
      exact?: boolean,
      strict?: boolean
    }> {}
  
    declare export class Switch extends React$Component<{
      children?: React$Node
    }> {}
  
    declare export function withRouter<P>(
      Component: React$ComponentType<{| ...ContextRouter, ...P |}>
    ): React$ComponentType<P>;
  
    declare type MatchPathOptions = {
      path?: string,
      exact?: boolean,
      strict?: boolean,
      sensitive?: boolean
    };
    declare export function matchPath(
      pathname: string,
      options?: MatchPathOptions | string
    ): null | Match;
}