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TypeScript

import type {
InitialEntry,
LazyRouteFunction,
Location,
MemoryHistory,
RelativeRoutingType,
Router as RemixRouter,
RouterState,
RouterSubscriber,
To,
TrackedPromise,
} from "@remix-run/router";
import {
AbortedDeferredError,
Action as NavigationType,
createMemoryHistory,
UNSAFE_getResolveToMatches as getResolveToMatches,
UNSAFE_invariant as invariant,
parsePath,
resolveTo,
stripBasename,
UNSAFE_warning as warning,
} from "@remix-run/router";
import * as React from "react";
import type {
DataRouteObject,
IndexRouteObject,
Navigator,
NonIndexRouteObject,
RouteMatch,
RouteObject,
} from "./context";
import {
AwaitContext,
DataRouterContext,
DataRouterStateContext,
LocationContext,
NavigationContext,
RouteContext,
} from "./context";
import {
_renderMatches,
useAsyncValue,
useInRouterContext,
useLocation,
useNavigate,
useOutlet,
useRoutes,
useRoutesImpl,
} from "./hooks";
import { logV6DeprecationWarnings } from "./deprecations";
export interface FutureConfig {
v7_relativeSplatPath: boolean;
v7_startTransition: boolean;
}
export interface RouterProviderProps {
fallbackElement?: React.ReactNode;
router: RemixRouter;
// Only accept future flags relevant to rendering behavior
// routing flags should be accessed via router.future
future?: Partial<Pick<FutureConfig, "v7_startTransition">>;
}
/**
Webpack + React 17 fails to compile on any of the following because webpack
complains that `startTransition` doesn't exist in `React`:
* import { startTransition } from "react"
* import * as React from from "react";
"startTransition" in React ? React.startTransition(() => setState()) : setState()
* import * as React from from "react";
"startTransition" in React ? React["startTransition"](() => setState()) : setState()
Moving it to a constant such as the following solves the Webpack/React 17 issue:
* import * as React from from "react";
const START_TRANSITION = "startTransition";
START_TRANSITION in React ? React[START_TRANSITION](() => setState()) : setState()
However, that introduces webpack/terser minification issues in production builds
in React 18 where minification/obfuscation ends up removing the call of
React.startTransition entirely from the first half of the ternary. Grabbing
this exported reference once up front resolves that issue.
See https://github.com/remix-run/react-router/issues/10579
*/
const START_TRANSITION = "startTransition";
const startTransitionImpl = React[START_TRANSITION];
/**
* Given a Remix Router instance, render the appropriate UI
*/
export function RouterProvider({
fallbackElement,
router,
future,
}: RouterProviderProps): React.ReactElement {
let [state, setStateImpl] = React.useState(router.state);
let { v7_startTransition } = future || {};
let setState = React.useCallback<RouterSubscriber>(
(newState: RouterState) => {
if (v7_startTransition && startTransitionImpl) {
startTransitionImpl(() => setStateImpl(newState));
} else {
setStateImpl(newState);
}
},
[setStateImpl, v7_startTransition]
);
// Need to use a layout effect here so we are subscribed early enough to
// pick up on any render-driven redirects/navigations (useEffect/<Navigate>)
React.useLayoutEffect(() => router.subscribe(setState), [router, setState]);
React.useEffect(() => {
warning(
fallbackElement == null || !router.future.v7_partialHydration,
"`<RouterProvider fallbackElement>` is deprecated when using " +
"`v7_partialHydration`, use a `HydrateFallback` component instead"
);
// Only log this once on initial mount
// eslint-disable-next-line react-hooks/exhaustive-deps
}, []);
let navigator = React.useMemo((): Navigator => {
return {
createHref: router.createHref,
encodeLocation: router.encodeLocation,
go: (n) => router.navigate(n),
push: (to, state, opts) =>
router.navigate(to, {
state,
preventScrollReset: opts?.preventScrollReset,
}),
replace: (to, state, opts) =>
router.navigate(to, {
replace: true,
state,
preventScrollReset: opts?.preventScrollReset,
}),
};
}, [router]);
let basename = router.basename || "/";
let dataRouterContext = React.useMemo(
() => ({
router,
navigator,
static: false,
basename,
}),
[router, navigator, basename]
);
React.useEffect(
() => logV6DeprecationWarnings(future, router.future),
[router, future]
);
// The fragment and {null} here are important! We need them to keep React 18's
// useId happy when we are server-rendering since we may have a <script> here
// containing the hydrated server-side staticContext (from StaticRouterProvider).
// useId relies on the component tree structure to generate deterministic id's
// so we need to ensure it remains the same on the client even though
// we don't need the <script> tag
return (
<>
<DataRouterContext.Provider value={dataRouterContext}>
<DataRouterStateContext.Provider value={state}>
<Router
basename={basename}
location={state.location}
navigationType={state.historyAction}
navigator={navigator}
future={{
v7_relativeSplatPath: router.future.v7_relativeSplatPath,
}}
>
{state.initialized || router.future.v7_partialHydration ? (
<DataRoutes
routes={router.routes}
future={router.future}
state={state}
/>
) : (
fallbackElement
)}
</Router>
</DataRouterStateContext.Provider>
</DataRouterContext.Provider>
{null}
</>
);
}
function DataRoutes({
routes,
future,
state,
}: {
routes: DataRouteObject[];
future: RemixRouter["future"];
state: RouterState;
}): React.ReactElement | null {
return useRoutesImpl(routes, undefined, state, future);
}
export interface MemoryRouterProps {
basename?: string;
children?: React.ReactNode;
initialEntries?: InitialEntry[];
initialIndex?: number;
future?: Partial<FutureConfig>;
}
/**
* A `<Router>` that stores all entries in memory.
*
* @see https://reactrouter.com/v6/router-components/memory-router
*/
export function MemoryRouter({
basename,
children,
initialEntries,
initialIndex,
future,
}: MemoryRouterProps): React.ReactElement {
let historyRef = React.useRef<MemoryHistory>();
if (historyRef.current == null) {
historyRef.current = createMemoryHistory({
initialEntries,
initialIndex,
v5Compat: true,
});
}
let history = historyRef.current;
let [state, setStateImpl] = React.useState({
action: history.action,
location: history.location,
});
let { v7_startTransition } = future || {};
let setState = React.useCallback(
(newState: { action: NavigationType; location: Location }) => {
v7_startTransition && startTransitionImpl
? startTransitionImpl(() => setStateImpl(newState))
: setStateImpl(newState);
},
[setStateImpl, v7_startTransition]
);
React.useLayoutEffect(() => history.listen(setState), [history, setState]);
React.useEffect(() => logV6DeprecationWarnings(future), [future]);
return (
<Router
basename={basename}
children={children}
location={state.location}
navigationType={state.action}
navigator={history}
future={future}
/>
);
}
export interface NavigateProps {
to: To;
replace?: boolean;
state?: any;
relative?: RelativeRoutingType;
}
/**
* Changes the current location.
*
* Note: This API is mostly useful in React.Component subclasses that are not
* able to use hooks. In functional components, we recommend you use the
* `useNavigate` hook instead.
*
* @see https://reactrouter.com/v6/components/navigate
*/
export function Navigate({
to,
replace,
state,
relative,
}: NavigateProps): null {
invariant(
useInRouterContext(),
// TODO: This error is probably because they somehow have 2 versions of
// the router loaded. We can help them understand how to avoid that.
`<Navigate> may be used only in the context of a <Router> component.`
);
let { future, static: isStatic } = React.useContext(NavigationContext);
warning(
!isStatic,
`<Navigate> must not be used on the initial render in a <StaticRouter>. ` +
`This is a no-op, but you should modify your code so the <Navigate> is ` +
`only ever rendered in response to some user interaction or state change.`
);
let { matches } = React.useContext(RouteContext);
let { pathname: locationPathname } = useLocation();
let navigate = useNavigate();
// Resolve the path outside of the effect so that when effects run twice in
// StrictMode they navigate to the same place
let path = resolveTo(
to,
getResolveToMatches(matches, future.v7_relativeSplatPath),
locationPathname,
relative === "path"
);
let jsonPath = JSON.stringify(path);
React.useEffect(
() => navigate(JSON.parse(jsonPath), { replace, state, relative }),
[navigate, jsonPath, relative, replace, state]
);
return null;
}
export interface OutletProps {
context?: unknown;
}
/**
* Renders the child route's element, if there is one.
*
* @see https://reactrouter.com/v6/components/outlet
*/
export function Outlet(props: OutletProps): React.ReactElement | null {
return useOutlet(props.context);
}
export interface PathRouteProps {
caseSensitive?: NonIndexRouteObject["caseSensitive"];
path?: NonIndexRouteObject["path"];
id?: NonIndexRouteObject["id"];
lazy?: LazyRouteFunction<NonIndexRouteObject>;
loader?: NonIndexRouteObject["loader"];
action?: NonIndexRouteObject["action"];
hasErrorBoundary?: NonIndexRouteObject["hasErrorBoundary"];
shouldRevalidate?: NonIndexRouteObject["shouldRevalidate"];
handle?: NonIndexRouteObject["handle"];
index?: false;
children?: React.ReactNode;
element?: React.ReactNode | null;
hydrateFallbackElement?: React.ReactNode | null;
errorElement?: React.ReactNode | null;
Component?: React.ComponentType | null;
HydrateFallback?: React.ComponentType | null;
ErrorBoundary?: React.ComponentType | null;
}
export interface LayoutRouteProps extends PathRouteProps {}
export interface IndexRouteProps {
caseSensitive?: IndexRouteObject["caseSensitive"];
path?: IndexRouteObject["path"];
id?: IndexRouteObject["id"];
lazy?: LazyRouteFunction<IndexRouteObject>;
loader?: IndexRouteObject["loader"];
action?: IndexRouteObject["action"];
hasErrorBoundary?: IndexRouteObject["hasErrorBoundary"];
shouldRevalidate?: IndexRouteObject["shouldRevalidate"];
handle?: IndexRouteObject["handle"];
index: true;
children?: undefined;
element?: React.ReactNode | null;
hydrateFallbackElement?: React.ReactNode | null;
errorElement?: React.ReactNode | null;
Component?: React.ComponentType | null;
HydrateFallback?: React.ComponentType | null;
ErrorBoundary?: React.ComponentType | null;
}
export type RouteProps = PathRouteProps | LayoutRouteProps | IndexRouteProps;
/**
* Declares an element that should be rendered at a certain URL path.
*
* @see https://reactrouter.com/v6/components/route
*/
export function Route(_props: RouteProps): React.ReactElement | null {
invariant(
false,
`A <Route> is only ever to be used as the child of <Routes> element, ` +
`never rendered directly. Please wrap your <Route> in a <Routes>.`
);
}
export interface RouterProps {
basename?: string;
children?: React.ReactNode;
location: Partial<Location> | string;
navigationType?: NavigationType;
navigator: Navigator;
static?: boolean;
future?: Partial<Pick<FutureConfig, "v7_relativeSplatPath">>;
}
/**
* Provides location context for the rest of the app.
*
* Note: You usually won't render a `<Router>` directly. Instead, you'll render a
* router that is more specific to your environment such as a `<BrowserRouter>`
* in web browsers or a `<StaticRouter>` for server rendering.
*
* @see https://reactrouter.com/v6/router-components/router
*/
export function Router({
basename: basenameProp = "/",
children = null,
location: locationProp,
navigationType = NavigationType.Pop,
navigator,
static: staticProp = false,
future,
}: RouterProps): React.ReactElement | null {
invariant(
!useInRouterContext(),
`You cannot render a <Router> inside another <Router>.` +
` You should never have more than one in your app.`
);
// Preserve trailing slashes on basename, so we can let the user control
// the enforcement of trailing slashes throughout the app
let basename = basenameProp.replace(/^\/*/, "/");
let navigationContext = React.useMemo(
() => ({
basename,
navigator,
static: staticProp,
future: {
v7_relativeSplatPath: false,
...future,
},
}),
[basename, future, navigator, staticProp]
);
if (typeof locationProp === "string") {
locationProp = parsePath(locationProp);
}
let {
pathname = "/",
search = "",
hash = "",
state = null,
key = "default",
} = locationProp;
let locationContext = React.useMemo(() => {
let trailingPathname = stripBasename(pathname, basename);
if (trailingPathname == null) {
return null;
}
return {
location: {
pathname: trailingPathname,
search,
hash,
state,
key,
},
navigationType,
};
}, [basename, pathname, search, hash, state, key, navigationType]);
warning(
locationContext != null,
`<Router basename="${basename}"> is not able to match the URL ` +
`"${pathname}${search}${hash}" because it does not start with the ` +
`basename, so the <Router> won't render anything.`
);
if (locationContext == null) {
return null;
}
return (
<NavigationContext.Provider value={navigationContext}>
<LocationContext.Provider children={children} value={locationContext} />
</NavigationContext.Provider>
);
}
export interface RoutesProps {
children?: React.ReactNode;
location?: Partial<Location> | string;
}
/**
* A container for a nested tree of `<Route>` elements that renders the branch
* that best matches the current location.
*
* @see https://reactrouter.com/v6/components/routes
*/
export function Routes({
children,
location,
}: RoutesProps): React.ReactElement | null {
return useRoutes(createRoutesFromChildren(children), location);
}
export interface AwaitResolveRenderFunction {
(data: Awaited<any>): React.ReactNode;
}
export interface AwaitProps {
children: React.ReactNode | AwaitResolveRenderFunction;
errorElement?: React.ReactNode;
resolve: TrackedPromise | any;
}
/**
* Component to use for rendering lazily loaded data from returning defer()
* in a loader function
*/
export function Await({ children, errorElement, resolve }: AwaitProps) {
return (
<AwaitErrorBoundary resolve={resolve} errorElement={errorElement}>
<ResolveAwait>{children}</ResolveAwait>
</AwaitErrorBoundary>
);
}
type AwaitErrorBoundaryProps = React.PropsWithChildren<{
errorElement?: React.ReactNode;
resolve: TrackedPromise | any;
}>;
type AwaitErrorBoundaryState = {
error: any;
};
enum AwaitRenderStatus {
pending,
success,
error,
}
const neverSettledPromise = new Promise(() => {});
class AwaitErrorBoundary extends React.Component<
AwaitErrorBoundaryProps,
AwaitErrorBoundaryState
> {
constructor(props: AwaitErrorBoundaryProps) {
super(props);
this.state = { error: null };
}
static getDerivedStateFromError(error: any) {
return { error };
}
componentDidCatch(error: any, errorInfo: any) {
console.error(
"<Await> caught the following error during render",
error,
errorInfo
);
}
render() {
let { children, errorElement, resolve } = this.props;
let promise: TrackedPromise | null = null;
let status: AwaitRenderStatus = AwaitRenderStatus.pending;
if (!(resolve instanceof Promise)) {
// Didn't get a promise - provide as a resolved promise
status = AwaitRenderStatus.success;
promise = Promise.resolve();
Object.defineProperty(promise, "_tracked", { get: () => true });
Object.defineProperty(promise, "_data", { get: () => resolve });
} else if (this.state.error) {
// Caught a render error, provide it as a rejected promise
status = AwaitRenderStatus.error;
let renderError = this.state.error;
promise = Promise.reject().catch(() => {}); // Avoid unhandled rejection warnings
Object.defineProperty(promise, "_tracked", { get: () => true });
Object.defineProperty(promise, "_error", { get: () => renderError });
} else if ((resolve as TrackedPromise)._tracked) {
// Already tracked promise - check contents
promise = resolve;
status =
"_error" in promise
? AwaitRenderStatus.error
: "_data" in promise
? AwaitRenderStatus.success
: AwaitRenderStatus.pending;
} else {
// Raw (untracked) promise - track it
status = AwaitRenderStatus.pending;
Object.defineProperty(resolve, "_tracked", { get: () => true });
promise = resolve.then(
(data: any) =>
Object.defineProperty(resolve, "_data", { get: () => data }),
(error: any) =>
Object.defineProperty(resolve, "_error", { get: () => error })
);
}
if (
status === AwaitRenderStatus.error &&
promise._error instanceof AbortedDeferredError
) {
// Freeze the UI by throwing a never resolved promise
throw neverSettledPromise;
}
if (status === AwaitRenderStatus.error && !errorElement) {
// No errorElement, throw to the nearest route-level error boundary
throw promise._error;
}
if (status === AwaitRenderStatus.error) {
// Render via our errorElement
return <AwaitContext.Provider value={promise} children={errorElement} />;
}
if (status === AwaitRenderStatus.success) {
// Render children with resolved value
return <AwaitContext.Provider value={promise} children={children} />;
}
// Throw to the suspense boundary
throw promise;
}
}
/**
* @private
* Indirection to leverage useAsyncValue for a render-prop API on `<Await>`
*/
function ResolveAwait({
children,
}: {
children: React.ReactNode | AwaitResolveRenderFunction;
}) {
let data = useAsyncValue();
let toRender = typeof children === "function" ? children(data) : children;
return <>{toRender}</>;
}
///////////////////////////////////////////////////////////////////////////////
// UTILS
///////////////////////////////////////////////////////////////////////////////
/**
* Creates a route config from a React "children" object, which is usually
* either a `<Route>` element or an array of them. Used internally by
* `<Routes>` to create a route config from its children.
*
* @see https://reactrouter.com/v6/utils/create-routes-from-children
*/
export function createRoutesFromChildren(
children: React.ReactNode,
parentPath: number[] = []
): RouteObject[] {
let routes: RouteObject[] = [];
React.Children.forEach(children, (element, index) => {
if (!React.isValidElement(element)) {
// Ignore non-elements. This allows people to more easily inline
// conditionals in their route config.
return;
}
let treePath = [...parentPath, index];
if (element.type === React.Fragment) {
// Transparently support React.Fragment and its children.
routes.push.apply(
routes,
createRoutesFromChildren(element.props.children, treePath)
);
return;
}
invariant(
element.type === Route,
`[${
typeof element.type === "string" ? element.type : element.type.name
}] is not a <Route> component. All component children of <Routes> must be a <Route> or <React.Fragment>`
);
invariant(
!element.props.index || !element.props.children,
"An index route cannot have child routes."
);
let route: RouteObject = {
id: element.props.id || treePath.join("-"),
caseSensitive: element.props.caseSensitive,
element: element.props.element,
Component: element.props.Component,
index: element.props.index,
path: element.props.path,
loader: element.props.loader,
action: element.props.action,
errorElement: element.props.errorElement,
ErrorBoundary: element.props.ErrorBoundary,
hasErrorBoundary:
element.props.ErrorBoundary != null ||
element.props.errorElement != null,
shouldRevalidate: element.props.shouldRevalidate,
handle: element.props.handle,
lazy: element.props.lazy,
};
if (element.props.children) {
route.children = createRoutesFromChildren(
element.props.children,
treePath
);
}
routes.push(route);
});
return routes;
}
/**
* Renders the result of `matchRoutes()` into a React element.
*/
export function renderMatches(
matches: RouteMatch[] | null
): React.ReactElement | null {
return _renderMatches(matches);
}