Handle hydration replaceState for static page with searchParams (#42744)

Ensures the searchParams do not get removed when the page is static.

Fixes #42697

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## Bug

- [x] Related issues linked using `fixes #number`
- [x] Integration tests added
- [x] Errors have a helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

packages/next/client/components/app-router.tsx

@@ -20,6 +20,7 @@ import {
   ACTION_REFRESH,
   ACTION_RESTORE,
   ACTION_SERVER_PATCH,
+  createHrefFromUrl,
   reducer,
 } from './reducer'
 import {
@@ -132,10 +133,11 @@ function Router({
       pushRef: { pendingPush: false, mpaNavigation: false },
       focusAndScrollRef: { apply: false },
       canonicalUrl:
-        initialCanonicalUrl +
-        // Hash is read as the initial value for canonicalUrl in the browser
-        // This is safe to do as canonicalUrl can't be rendered, it's only used to control the history updates the useEffect further down.
-        (typeof window !== 'undefined' ? window.location.hash : ''),
+        // location.href is read as the initial value for canonicalUrl in the browser
+        // This is safe to do as canonicalUrl can't be rendered, it's only used to control the history updates in the useEffect further down in this file.
+        typeof window !== 'undefined'
+          ? createHrefFromUrl(new URL(window.location.href))
+          : initialCanonicalUrl,
     }
   }, [children, initialCanonicalUrl, initialTree])
   const [

packages/next/client/components/reducer.ts

@@ -43,7 +43,7 @@ function readRecordValue(thenable: any) {
   }
 }
 
-function createHrefFromUrl(url: URL): string {
+export function createHrefFromUrl(url: URL): string {
   return url.pathname + url.search + url.hash
 }
 

test/e2e/app-dir/app-static.test.ts

@@ -4,7 +4,7 @@ import { promisify } from 'util'
 import path, { join } from 'path'
 import { createNext, FileRef } from 'e2e-utils'
 import { NextInstance } from 'test/lib/next-modes/base'
-import { check, fetchViaHTTP, normalizeRegEx } from 'next-test-utils'
+import { check, fetchViaHTTP, normalizeRegEx, waitFor } from 'next-test-utils'
 import webdriver from 'next-webdriver'
 
 const glob = promisify(globOrig)
@@ -452,5 +452,17 @@ describe('app-dir static/dynamic handling', () => {
         )
       })
     }
+
+    it('should keep querystring on static page', async () => {
+      const browser = await webdriver(next.url, '/blog/tim?message=hello-world')
+      const checkUrl = async () =>
+        expect(await browser.url()).toBe(
+          next.url + '/blog/tim?message=hello-world'
+        )
+
+      checkUrl()
+      await waitFor(1000)
+      checkUrl()
+    })
   })
 })