Fix defaultShouldRevalidate when using single fetch

.changeset/twenty-waves-cheer.md

@@ -0,0 +1,5 @@
+---
+"@remix-run/react": patch
+---
+
+Fix `defaultShouldRevalidate` value when using single fetch

integration/single-fetch-test.ts

@@ -2327,6 +2327,103 @@ test.describe("single-fetch", () => {
       ).toBe(true);
     });
 
+    test("provides the proper defaultShouldRevalidate value", async ({
+      page,
+    }) => {
+      let fixture = await createFixture({
+        config: {
+          future: {
+            v3_singleFetch: true,
+          },
+        },
+        files: {
+          ...files,
+          "app/routes/_index.tsx": js`
+            import { Link } from '@remix-run/react';
+            export default function Component() {
+              return <Link to="/parent/a">Go to /parent/a</Link>;
+            }
+          `,
+          "app/routes/parent.tsx": js`
+            import { Link, Outlet, useLoaderData } from '@remix-run/react';
+            let count = 0;
+            export function loader({ request }) {
+              return { count: ++count };
+            }
+            export function shouldRevalidate({ defaultShouldRevalidate }) {
+              return defaultShouldRevalidate;
+            }
+            export default function Component() {
+              return (
+                <>
+                  <p id="parent">Parent Count: {useLoaderData().count}</p>
+                  <Link to="/parent/a">Go to /parent/a</Link>
+                  <Link to="/parent/b">Go to /parent/b</Link>
+                  <Outlet/>
+                </>
+              );
+            }
+          `,
+          "app/routes/parent.a.tsx": js`
+            import { useLoaderData } from '@remix-run/react';
+            let count = 0;
+            export function loader({ request }) {
+              return { count: ++count };
+            }
+            export default function Component() {
+              return <p id="a">A Count: {useLoaderData().count}</p>;
+            }
+          `,
+          "app/routes/parent.b.tsx": js`
+            import { useLoaderData } from '@remix-run/react';
+            let count = 0;
+            export function loader({ request }) {
+              return { count: ++count };
+            }
+            export default function Component() {
+              return <p id="b">B Count: {useLoaderData().count}</p>;
+            }
+          `,
+        },
+      });
+      let appFixture = await createAppFixture(fixture);
+      let app = new PlaywrightFixture(appFixture, page);
+
+      let urls: string[] = [];
+      page.on("request", (req) => {
+        if (req.url().includes(".data")) {
+          urls.push(req.url());
+        }
+      });
+
+      await app.goto("/");
+
+      await app.clickLink("/parent/a");
+      await page.waitForSelector("#a");
+      expect(await app.getHtml("#parent")).toContain("Parent Count: 1");
+      expect(await app.getHtml("#a")).toContain("A Count: 1");
+      expect(urls.length).toBe(1);
+      expect(urls[0].endsWith("/parent/a.data")).toBe(true);
+      urls = [];
+
+      await app.clickLink("/parent/b");
+      await page.waitForSelector("#b");
+      expect(await app.getHtml("#parent")).toContain("Parent Count: 2");
+      expect(await app.getHtml("#b")).toContain("B Count: 1");
+      expect(urls.length).toBe(1);
+      // Reload the parent route
+      expect(urls[0].endsWith("/parent/b.data")).toBe(true);
+      urls = [];
+
+      await app.clickLink("/parent/a");
+      await page.waitForSelector("#a");
+      expect(await app.getHtml("#parent")).toContain("Parent Count: 3");
+      expect(await app.getHtml("#a")).toContain("A Count: 2");
+      expect(urls.length).toBe(1);
+      // Reload the parent route
+      expect(urls[0].endsWith("/parent/a.data")).toBe(true);
+    });
+
     test("does not add a _routes param for routes without loaders", async ({
       page,
     }) => {

packages/remix-react/components.tsx

@@ -459,9 +459,10 @@ function PrefetchPageLinksImpl({
         matches,
         manifest,
         location,
+        future,
         "data"
       ),
-    [page, nextMatches, matches, manifest, location]
+    [page, nextMatches, matches, manifest, location, future]
   );
 
   let dataHrefs = React.useMemo(() => {
@@ -535,9 +536,10 @@ function PrefetchPageLinksImpl({
         matches,
         manifest,
         location,
+        future,
         "assets"
       ),
-    [page, nextMatches, matches, manifest, location]
+    [page, nextMatches, matches, manifest, location, future]
   );
 
   let moduleHrefs = React.useMemo(

packages/remix-react/links.ts

@@ -2,7 +2,7 @@ import type { AgnosticDataRouteMatch } from "@remix-run/router";
 import type { Location } from "react-router-dom";
 import { parsePath } from "react-router-dom";
 
-import type { AssetsManifest } from "./entry";
+import type { AssetsManifest, FutureConfig } from "./entry";
 import type { RouteModules, RouteModule } from "./routeModules";
 import type { EntryRoute } from "./routes";
 import { loadRouteModule } from "./routeModules";
@@ -353,6 +353,7 @@ export function getNewMatchesForLinks(
   currentMatches: AgnosticDataRouteMatch[],
   manifest: AssetsManifest,
   location: Location,
+  future: FutureConfig,
   mode: "data" | "assets"
 ): AgnosticDataRouteMatch[] {
   let path = parsePathPatch(page);
@@ -376,7 +377,8 @@ export function getNewMatchesForLinks(
   // NOTE: keep this mostly up-to-date w/ the transition data diff, but this
   // version doesn't care about submissions
   let newMatches =
-    mode === "data" && location.search !== path.search
+    mode === "data" &&
+    (future.v3_singleFetch || location.search !== path.search)
       ? // this is really similar to stuff in transition.ts, maybe somebody smarter
         // than me (or in less of a hurry) can share some of it. You're the best.
         nextMatches.filter((match, index) => {
@@ -389,6 +391,12 @@ export function getNewMatchesForLinks(
             return true;
           }
 
+          // For reused routes on GET navigations, by default:
+          // - Single fetch always revalidates
+          // - Multi fetch revalidates if search params changed
+          let defaultShouldRevalidate =
+            future.v3_singleFetch || location.search !== path.search;
+
           if (match.route.shouldRevalidate) {
             let routeChoice = match.route.shouldRevalidate({
               currentUrl: new URL(
@@ -398,13 +406,13 @@ export function getNewMatchesForLinks(
               currentParams: currentMatches[0]?.params || {},
               nextUrl: new URL(page, window.origin),
               nextParams: match.params,
-              defaultShouldRevalidate: true,
+              defaultShouldRevalidate,
             });
             if (typeof routeChoice === "boolean") {
               return routeChoice;
             }
           }
-          return true;
+          return defaultShouldRevalidate;
         })
       : nextMatches.filter((match, index) => {
           let manifestRoute = manifest.routes[match.route.id];

packages/remix-react/routes.tsx

@@ -315,13 +315,12 @@ export function createClientRoutes(
         ...dataRoute,
         ...getRouteComponents(route, routeModule, isSpaMode),
         handle: routeModule.handle,
-        shouldRevalidate: needsRevalidation
-          ? wrapShouldRevalidateForHdr(
-              route.id,
-              routeModule.shouldRevalidate,
-              needsRevalidation
-            )
-          : routeModule.shouldRevalidate,
+        shouldRevalidate: getShouldRevalidateFunction(
+          future,
+          routeModule,
+          route.id,
+          needsRevalidation
+        ),
       });
 
       let initialData = initialState?.loaderData?.[route.id];
@@ -486,7 +485,12 @@ export function createClientRoutes(
           ...(lazyRoute.loader ? { loader: lazyRoute.loader } : {}),
           ...(lazyRoute.action ? { action: lazyRoute.action } : {}),
           hasErrorBoundary: lazyRoute.hasErrorBoundary,
-          shouldRevalidate: lazyRoute.shouldRevalidate,
+          shouldRevalidate: getShouldRevalidateFunction(
+            future,
+            lazyRoute,
+            route.id,
+            needsRevalidation
+          ),
           handle: lazyRoute.handle,
           // No need to wrap these in layout since the root route is never
           // loaded via route.lazy()
@@ -511,6 +515,34 @@ export function createClientRoutes(
   });
 }
 
+function getShouldRevalidateFunction(
+  future: FutureConfig,
+  route: Partial<DataRouteObject>,
+  routeId: string,
+  needsRevalidation: Set<string> | undefined
+) {
+  let shouldRevalidateFn = route.shouldRevalidate;
+
+  // Single fetch revalidates by default, so override the RR default value which
+  // matches the multi-fetch behavior with `true`
+  if (future.v3_singleFetch && shouldRevalidateFn) {
+    let originalFn = shouldRevalidateFn;
+    shouldRevalidateFn = (opts) =>
+      originalFn({ ...opts, defaultShouldRevalidate: true });
+  }
+
+  // During HDR we force revalidation for updated routes
+  if (needsRevalidation) {
+    shouldRevalidateFn = wrapShouldRevalidateForHdr(
+      routeId,
+      shouldRevalidateFn,
+      needsRevalidation
+    );
+  }
+
+  return shouldRevalidateFn;
+}
+
 // When an HMR / HDR update happens we opt out of all user-defined
 // revalidation logic and force a revalidation on the first call
 function wrapShouldRevalidateForHdr(