Workaround Chrome navigation issue (#10839)

Thanks @javiercn and @SteveSandersonMS!

src/Components/Browser.JS/dist/Debug/blazor.server.js

@@ -14941,9 +14941,19 @@ function enableNavigationInterception() {
 function navigateTo(uri, forceLoad) {
     var absoluteUri = toAbsoluteUri(uri);
     if (!forceLoad && isWithinBaseUriSpace(absoluteUri)) {
+        // It's an internal URL, so do client-side navigation
         performInternalNavigation(absoluteUri, false);
     }
+    else if (forceLoad && location.href === uri) {
+        // Force-loading the same URL you're already on requires special handling to avoid
+        // triggering browser-specific behavior issues.
+        // For details about what this fixes and why, see https://github.com/aspnet/AspNetCore/pull/10839
+        var temporaryUri = uri + '?';
+        history.replaceState(null, '', temporaryUri);
+        location.replace(uri);
+    }
     else {
+        // It's either an external URL, or forceLoad is requested, so do a full page load
         location.href = uri;
     }
 }

src/Components/Browser.JS/dist/Debug/blazor.webassembly.js

@@ -2507,9 +2507,19 @@ function enableNavigationInterception() {
 function navigateTo(uri, forceLoad) {
     var absoluteUri = toAbsoluteUri(uri);
     if (!forceLoad && isWithinBaseUriSpace(absoluteUri)) {
+        // It's an internal URL, so do client-side navigation
         performInternalNavigation(absoluteUri, false);
     }
+    else if (forceLoad && location.href === uri) {
+        // Force-loading the same URL you're already on requires special handling to avoid
+        // triggering browser-specific behavior issues.
+        // For details about what this fixes and why, see https://github.com/aspnet/AspNetCore/pull/10839
+        var temporaryUri = uri + '?';
+        history.replaceState(null, '', temporaryUri);
+        location.replace(uri);
+    }
     else {
+        // It's either an external URL, or forceLoad is requested, so do a full page load
         location.href = uri;
     }
 }

src/Components/Browser.JS/src/Services/UriHelper.ts

@@ -65,8 +65,17 @@ export function navigateTo(uri: string, forceLoad: boolean) {
   const absoluteUri = toAbsoluteUri(uri);
 
   if (!forceLoad && isWithinBaseUriSpace(absoluteUri)) {
+    // It's an internal URL, so do client-side navigation
     performInternalNavigation(absoluteUri, false);
+  } else if (forceLoad && location.href === uri) {
+    // Force-loading the same URL you're already on requires special handling to avoid
+    // triggering browser-specific behavior issues.
+    // For details about what this fixes and why, see https://github.com/aspnet/AspNetCore/pull/10839
+    const temporaryUri = uri + '?';
+    history.replaceState(null, '', temporaryUri);
+    location.replace(uri);
   } else {
+    // It's either an external URL, or forceLoad is requested, so do a full page load
     location.href = uri;
   }
 }

src/Components/test/E2ETest/Tests/RoutingTest.cs

@@ -301,6 +301,30 @@ namespace Microsoft.AspNetCore.Components.E2ETest.Tests
             Browser.Equal("Not a component!", () => Browser.FindElement(By.Id("test-info")).Text);
         }
 
+        [Fact]
+        public void CanGoBackFromNotAComponent()
+        {
+            SetUrlViaPushState("/");
+
+            // First go to some URL on the router
+            var app = MountTestComponent<TestRouter>();
+            app.FindElement(By.LinkText("Other")).Click();
+            Browser.True(() => Browser.Url.EndsWith("/Other"));
+
+            // Now follow a link out of the SPA entirely
+            app.FindElement(By.LinkText("Not a component")).Click();
+            Browser.Equal("Not a component!", () => Browser.FindElement(By.Id("test-info")).Text);
+            Browser.True(() => Browser.Url.EndsWith("/NotAComponent.html"));
+
+            // Now click back
+            // Because of how the tests are structured with the router not appearing until the router
+            // tests are selected, we can only observe the test selector being there, but this is enough
+            // to show we did go back to the right place and the Blazor app started up
+            Browser.Navigate().Back();
+            Browser.True(() => Browser.Url.EndsWith("/Other"));
+            WaitUntilTestSelectorReady();
+        }
+
         [Fact]
         public void CanNavigateProgrammatically()
         {