fix: support basename in static routers

.changeset/funny-oranges-arrive.md

@@ -0,0 +1,6 @@
+---
+"react-router-dom": patch
+"@remix-run/router": patch
+---
+
+Support `basename` in static data routers

package.json

@@ -107,7 +107,7 @@
   },
   "filesize": {
     "packages/router/dist/router.umd.min.js": {
-      "none": "34.5 kB"
+      "none": "35 kB"
     },
     "packages/react-router/dist/react-router.production.min.js": {
       "none": "12.5 kB"

packages/react-router-dom/__tests__/data-static-router-test.tsx

@@ -3,6 +3,7 @@ import * as ReactDOMServer from "react-dom/server";
 import type { StaticHandlerContext } from "@remix-run/router";
 import { unstable_createStaticHandler as createStaticHandler } from "@remix-run/router";
 import {
+  Link,
   Outlet,
   useLoaderData,
   useLocation,
@@ -17,7 +18,7 @@ beforeEach(() => {
   jest.spyOn(console, "warn").mockImplementation(() => {});
 });
 
-describe("A <DataStaticRouter>", () => {
+describe("A <StaticRouterProvider>", () => {
   it("renders an initialized router", async () => {
     let hooksData1: {
       location: ReturnType<typeof useLocation>;
@@ -45,7 +46,12 @@ describe("A <DataStaticRouter>", () => {
         loaderData: useLoaderData(),
         matches: useMatches(),
       };
-      return <h1>👋</h1>;
+      return (
+        <>
+          <h1>👋</h1>
+          <Link to="/the/other/path">Other</Link>
+        </>
+      );
     }
 
     let routes = [
@@ -71,7 +77,7 @@ describe("A <DataStaticRouter>", () => {
     let { query } = createStaticHandler(routes);
 
     let context = (await query(
-      new Request("http:/localhost/the/path?the=query#the-hash", {
+      new Request("http://localhost/the/path?the=query#the-hash", {
         signal: new AbortController().signal,
       })
     )) as StaticHandlerContext;
@@ -85,6 +91,7 @@ describe("A <DataStaticRouter>", () => {
       </React.StrictMode>
     );
     expect(html).toMatch("<h1>👋</h1>");
+    expect(html).toMatch('<a href="/the/other/path">');
 
     // @ts-expect-error
     expect(hooksData1.location).toEqual({
@@ -155,6 +162,59 @@ describe("A <DataStaticRouter>", () => {
     ]);
   });
 
+  it("renders an initialized router with a basename", async () => {
+    let location: ReturnType<typeof useLocation>;
+
+    function GetLocation() {
+      location = useLocation();
+      return (
+        <>
+          <h1>👋</h1>
+          <Link to="/the/other/path">Other</Link>
+        </>
+      );
+    }
+
+    let routes = [
+      {
+        path: "the",
+        children: [
+          {
+            path: "path",
+            element: <GetLocation />,
+          },
+        ],
+      },
+    ];
+    let { query } = createStaticHandler(routes, { basename: "/base" });
+
+    let context = (await query(
+      new Request("http://localhost/base/the/path?the=query#the-hash", {
+        signal: new AbortController().signal,
+      })
+    )) as StaticHandlerContext;
+
+    let html = ReactDOMServer.renderToStaticMarkup(
+      <React.StrictMode>
+        <StaticRouterProvider
+          router={createStaticRouter(routes, context)}
+          context={context}
+        />
+      </React.StrictMode>
+    );
+    expect(html).toMatch("<h1>👋</h1>");
+    expect(html).toMatch('<a href="/base/the/other/path">');
+
+    // @ts-expect-error
+    expect(location).toEqual({
+      pathname: "/the/path",
+      search: "?the=query",
+      hash: "#the-hash",
+      state: null,
+      key: expect.any(String),
+    });
+  });
+
   it("renders hydration data by default", async () => {
     let routes = [
       {

packages/react-router-dom/__tests__/static-link-test.tsx

@@ -17,6 +17,21 @@ describe("A <Link> in a <StaticRouter>", () => {
 
       expect(renderer.root.findByType("a").props.href).toEqual("/mjackson");
     });
+
+    it("uses the right href with a basename", () => {
+      let renderer: TestRenderer.ReactTestRenderer;
+      TestRenderer.act(() => {
+        renderer = TestRenderer.create(
+          <StaticRouter location="/base" basename="/base">
+            <Link to="mjackson" />
+          </StaticRouter>
+        );
+      });
+
+      expect(renderer.root.findByType("a").props.href).toEqual(
+        "/base/mjackson"
+      );
+    });
   });
 
   describe("with an object", () => {

packages/react-router-dom/server.tsx

@@ -65,7 +65,6 @@ export function StaticRouter({
 }
 
 export interface StaticRouterProviderProps {
-  basename?: string;
   context: StaticHandlerContext;
   router: RemixRouter;
   hydrate?: boolean;
@@ -77,7 +76,6 @@ export interface StaticRouterProviderProps {
  * on the server where there is no stateful UI.
  */
 export function unstable_StaticRouterProvider({
-  basename,
   context,
   router,
   hydrate = true,
@@ -92,7 +90,7 @@ export function unstable_StaticRouterProvider({
     router,
     navigator: getStatelessNavigator(),
     static: true,
-    basename: basename || "/",
+    basename: context.basename || "/",
   };
 
   let hydrateScript = "";
@@ -191,7 +189,7 @@ export function unstable_createStaticRouter(
 
   return {
     get basename() {
-      return "/";
+      return context.basename;
     },
     get state() {
       return {

packages/router/__tests__/router-test.ts

@@ -10100,6 +10100,21 @@ describe("a router", () => {
         });
       });
 
+      it("should support document load navigations with a basename", async () => {
+        let { query } = createStaticHandler(SSR_ROUTES, { basename: "/base" });
+        let context = await query(createRequest("/base/parent/child"));
+        expect(context).toMatchObject({
+          actionData: null,
+          loaderData: {
+            parent: "PARENT LOADER",
+            child: "CHILD LOADER",
+          },
+          errors: null,
+          location: { pathname: "/base/parent/child" },
+          matches: [{ route: { id: "parent" } }, { route: { id: "child" } }],
+        });
+      });
+
       it("should support document load navigations returning responses", async () => {
         let { query } = createStaticHandler(SSR_ROUTES);
         let context = await query(createRequest("/parent/json"));
@@ -11020,6 +11035,38 @@ describe("a router", () => {
         expect(data).toBe("");
       });
 
+      it("should support singular route load navigations (with a basename)", async () => {
+        let { queryRoute } = createStaticHandler(SSR_ROUTES, {
+          basename: "/base",
+        });
+        let data;
+
+        // Layout route
+        data = await queryRoute(createRequest("/base/parent"), "parent");
+        expect(data).toBe("PARENT LOADER");
+
+        // Index route
+        data = await queryRoute(createRequest("/base/parent"), "parentIndex");
+        expect(data).toBe("PARENT INDEX LOADER");
+
+        // Parent in nested route
+        data = await queryRoute(createRequest("/base/parent/child"), "parent");
+        expect(data).toBe("PARENT LOADER");
+
+        // Child in nested route
+        data = await queryRoute(createRequest("/base/parent/child"), "child");
+        expect(data).toBe("CHILD LOADER");
+
+        // Non-undefined falsey values should count
+        let T = setupFlexRouteTest();
+        data = await T.resolveLoader(null);
+        expect(data).toBeNull();
+        data = await T.resolveLoader(false);
+        expect(data).toBe(false);
+        data = await T.resolveLoader("");
+        expect(data).toBe("");
+      });
+
       it("should support singular route submit navigations (primitives)", async () => {
         let { queryRoute } = createStaticHandler(SSR_ROUTES);
         let data;

packages/router/router.ts

@@ -298,6 +298,7 @@ export interface RouterInit {
  * State returned from a server-side query() call
  */
 export interface StaticHandlerContext {
+  basename: Router["basename"];
   location: RouterState["location"];
   matches: RouterState["matches"];
   loaderData: RouterState["loaderData"];
@@ -1858,14 +1859,18 @@ const validActionMethods = new Set(["POST", "PUT", "PATCH", "DELETE"]);
 const validRequestMethods = new Set(["GET", "HEAD", ...validActionMethods]);
 
 export function unstable_createStaticHandler(
-  routes: AgnosticRouteObject[]
+  routes: AgnosticRouteObject[],
+  opts?: {
+    basename?: string;
+  }
 ): StaticHandler {
   invariant(
     routes.length > 0,
     "You must provide a non-empty routes array to unstable_createStaticHandler"
   );
 
   let dataRoutes = convertRoutesToDataRoutes(routes);
+  let basename = (opts ? opts.basename : null) || "/";
 
   /**
    * The query() method is intended for document requests, in which we want to
@@ -1891,13 +1896,14 @@ export function unstable_createStaticHandler(
   ): Promise<StaticHandlerContext | Response> {
     let url = new URL(request.url);
     let location = createLocation("", createPath(url), null, "default");
-    let matches = matchRoutes(dataRoutes, location);
+    let matches = matchRoutes(dataRoutes, location, basename);
 
     if (!validRequestMethods.has(request.method)) {
       let error = getInternalRouterError(405, { method: request.method });
       let { matches: methodNotAllowedMatches, route } =
         getShortCircuitMatches(dataRoutes);
       return {
+        basename,
         location,
         matches: methodNotAllowedMatches,
         loaderData: {},
@@ -1914,6 +1920,7 @@ export function unstable_createStaticHandler(
       let { matches: notFoundMatches, route } =
         getShortCircuitMatches(dataRoutes);
       return {
+        basename,
         location,
         matches: notFoundMatches,
         loaderData: {},
@@ -1935,7 +1942,7 @@ export function unstable_createStaticHandler(
     // When returning StaticHandlerContext, we patch back in the location here
     // since we need it for React Context.  But this helps keep our submit and
     // loadRouteData operating on a Request instead of a Location
-    return { location, ...result };
+    return { location, basename, ...result };
   }
 
   /**
@@ -1961,7 +1968,7 @@ export function unstable_createStaticHandler(
   async function queryRoute(request: Request, routeId?: string): Promise<any> {
     let url = new URL(request.url);
     let location = createLocation("", createPath(url), null, "default");
-    let matches = matchRoutes(dataRoutes, location);
+    let matches = matchRoutes(dataRoutes, location, basename);
 
     if (!validRequestMethods.has(request.method)) {
       throw getInternalRouterError(405, { method: request.method });
@@ -2007,7 +2014,7 @@ export function unstable_createStaticHandler(
     location: Location,
     matches: AgnosticDataRouteMatch[],
     routeMatch?: AgnosticDataRouteMatch
-  ): Promise<Omit<StaticHandlerContext, "location"> | Response> {
+  ): Promise<Omit<StaticHandlerContext, "location" | "basename"> | Response> {
     invariant(
       request.signal,
       "query()/queryRoute() requests must contain an AbortController signal"
@@ -2056,7 +2063,7 @@ export function unstable_createStaticHandler(
     matches: AgnosticDataRouteMatch[],
     actionMatch: AgnosticDataRouteMatch,
     isRouteRequest: boolean
-  ): Promise<Omit<StaticHandlerContext, "location"> | Response> {
+  ): Promise<Omit<StaticHandlerContext, "location" | "basename"> | Response> {
     let result: DataResult;
 
     if (!actionMatch.route.action) {
@@ -2078,7 +2085,7 @@ export function unstable_createStaticHandler(
         request,
         actionMatch,
         matches,
-        undefined, // Basename not currently supported in static handlers
+        basename,
         true,
         isRouteRequest
       );
@@ -2168,7 +2175,10 @@ export function unstable_createStaticHandler(
     routeMatch?: AgnosticDataRouteMatch,
     pendingActionError?: RouteData
   ): Promise<
-    | Omit<StaticHandlerContext, "location" | "actionData" | "actionHeaders">
+    | Omit<
+        StaticHandlerContext,
+        "location" | "basename" | "actionData" | "actionHeaders"
+      >
     | Response
   > {
     let isRouteRequest = routeMatch != null;
@@ -2208,7 +2218,7 @@ export function unstable_createStaticHandler(
           request,
           match,
           matches,
-          undefined, // Basename not currently supported in static handlers
+          basename,
           true,
           isRouteRequest
         )
@@ -2519,7 +2529,7 @@ async function callLoaderOrAction(
   request: Request,
   match: AgnosticDataRouteMatch,
   matches: AgnosticDataRouteMatch[],
-  basename: string | undefined,
+  basename = "/",
   isStaticRequest: boolean = false,
   isRouteRequest: boolean = false
 ): Promise<DataResult> {