Lift startViewTransition implementation to react-router-dom (#10928)

.changeset/lift-start-view-transition.md

@@ -0,0 +1,6 @@
+---
+"react-router-dom": patch
+"react-router": patch
+---
+
+Export a separate `RouterProvider` from `react-router-dom` with `startViewTransition` support

.changeset/start-view-transition.md

@@ -1,6 +1,5 @@
 ---
 "react-router-dom": minor
-"react-router": minor
 "@remix-run/router": minor
 ---
 

package.json

@@ -113,16 +113,16 @@
       "none": "48.3 kB"
     },
     "packages/react-router/dist/react-router.production.min.js": {
-      "none": "15.2 kB"
+      "none": "13.9 kB"
     },
     "packages/react-router/dist/umd/react-router.production.min.js": {
-      "none": "17.61 kB"
+      "none": "16.3 kB"
     },
     "packages/react-router-dom/dist/react-router-dom.production.min.js": {
-      "none": "13.61 kB"
+      "none": "15.9 kB"
     },
     "packages/react-router-dom/dist/umd/react-router-dom.production.min.js": {
-      "none": "19.91 kB"
+      "none": "22.1 kB"
     }
   }
 }

packages/react-router-dom/__tests__/exports-test.tsx

@@ -6,16 +6,23 @@ let nonReExportedKeys = new Set([
   "UNSAFE_useRoutesImpl",
 ]);
 
+let modifiedExports = new Set(["RouterProvider"]);
+
 describe("react-router-dom", () => {
   for (let key in ReactRouter) {
-    if (!nonReExportedKeys.has(key)) {
-      it(`re-exports ${key} from react-router`, () => {
-        expect(ReactRouterDOM[key]).toBe(ReactRouter[key]);
-      });
-    } else {
+    if (nonReExportedKeys.has(key)) {
       it(`does not re-export ${key} from react-router`, () => {
         expect(ReactRouterDOM[key]).toBe(undefined);
       });
+    } else if (modifiedExports.has(key)) {
+      it(`re-exports a different version of ${key}`, () => {
+        expect(ReactRouterDOM[key]).toBeDefined();
+        expect(ReactRouterDOM[key]).not.toBe(ReactRouter[key]);
+      });
+    } else {
+      it(`re-exports ${key} from react-router`, () => {
+        expect(ReactRouterDOM[key]).toBe(ReactRouter[key]);
+      });
     }
   }
 });