Revert useResolvedPath fix in splat routes

.changeset/revert-resolve-to-fix.md

@@ -0,0 +1,7 @@
+---
+"react-router-dom": patch
+"react-router": patch
+"@remix-run/router": patch
+---
+
+Revert the `useResolvedPath` fix for splat routes due to a large number of applications that were relying on the buggy behavior (see https://github.com/remix-run/react-router/issues/11052#issuecomment-1836589329). We plan to re-introduce this fix behind a future flag in the next minor version.

package.json

@@ -110,7 +110,7 @@
   },
   "filesize": {
     "packages/router/dist/router.umd.min.js": {
-      "none": "49.4 kB"
+      "none": "49.3 kB"
     },
     "packages/react-router/dist/react-router.production.min.js": {
       "none": "13.9 kB"

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

@@ -2942,44 +2942,6 @@ function testDomRouter(
             "/foo/bar"
           );
         });
-
-        it("includes param portion of path when no action is specified (inline splat)", async () => {
-          let router = createTestRouter(
-            createRoutesFromElements(
-              <Route path="/">
-                <Route path="foo">
-                  <Route path=":param" element={<NoActionComponent />} />
-                </Route>
-              </Route>
-            ),
-            {
-              window: getWindow("/foo/bar"),
-            }
-          );
-          let { container } = render(<RouterProvider router={router} />);
-
-          expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar"
-          );
-        });
-
-        it("includes splat portion of path when no action is specified (nested splat)", async () => {
-          let router = createTestRouter(
-            createRoutesFromElements(
-              <Route path="/">
-                <Route path="foo/:param" element={<NoActionComponent />} />
-              </Route>
-            ),
-            {
-              window: getWindow("/foo/bar"),
-            }
-          );
-          let { container } = render(<RouterProvider router={router} />);
-
-          expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar"
-          );
-        });
       });
 
       describe("splat routes", () => {
@@ -2999,7 +2961,7 @@ function testDomRouter(
           let { container } = render(<RouterProvider router={router} />);
 
           expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar?a=1"
+            "/foo?a=1"
           );
         });
 
@@ -3019,7 +2981,7 @@ function testDomRouter(
           let { container } = render(<RouterProvider router={router} />);
 
           expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar"
+            "/foo"
           );
         });
 
@@ -3039,25 +3001,7 @@ function testDomRouter(
           let { container } = render(<RouterProvider router={router} />);
 
           expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar"
-          );
-        });
-
-        it("includes splat portion of path when no action is specified (inline splat)", async () => {
-          let router = createTestRouter(
-            createRoutesFromElements(
-              <Route path="/">
-                <Route path="foo/*" element={<NoActionComponent />} />
-              </Route>
-            ),
-            {
-              window: getWindow("/foo/bar/baz"),
-            }
-          );
-          let { container } = render(<RouterProvider router={router} />);
-
-          expect(container.querySelector("form")?.getAttribute("action")).toBe(
-            "/foo/bar/baz"
+            "/foo"
           );
         });
       });
@@ -3179,13 +3123,10 @@ function testDomRouter(
       it("navigates relative to the URL for splat routes", async () => {
         let router = createTestRouter(
           createRoutesFromElements(
-            <Route path="inbox">
-              <Route path="messages" />
-              <Route
-                path="messages/*"
-                element={<Form action=".." relative="path" />}
-              />
-            </Route>
+            <Route
+              path="inbox/messages/*"
+              element={<Form action=".." relative="path" />}
+            />
           ),
           {
             window: getWindow("/inbox/messages/1/2/3"),
@@ -3194,7 +3135,7 @@ function testDomRouter(
         let { container } = render(<RouterProvider router={router} />);
 
         expect(container.querySelector("form")?.getAttribute("action")).toBe(
-          "/inbox/messages/1/2"
+          "/inbox"
         );
       });
     });

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

@@ -530,7 +530,7 @@ describe("<Link> href", () => {
       });
 
       expect(renderer.root.findByType("a").props.href).toEqual(
-        "/inbox/messages/abc"
+        "/inbox/messages"
       );
     });
 

packages/react-router-dom/index.tsx

@@ -1543,8 +1543,10 @@ export function useFormAction(
   // object referenced by useMemo inside useResolvedPath
   let path = { ...useResolvedPath(action ? action : ".", { relative }) };
 
-  // If no action was specified, browsers will persist current search params
-  // when determining the path, so match that behavior
+  // Previously we set the default action to ".". The problem with this is that
+  // `useResolvedPath(".")` excludes search params of the resolved URL. This is
+  // the intended behavior of when "." is specifically provided as
+  // the form action, but inconsistent w/ browsers when the action is omitted.
   // https://github.com/remix-run/remix/issues/927
   let location = useLocation();
   if (action == null) {