fix: fix hash changes from location.href.

Author: andycall

integration_tests/specs/navigator/history.ts

@@ -64,4 +64,35 @@ describe('history API', () => {
       history.go(-1);
     });
   });
+
+  it('hashchange should fire when history back', (done) => {
+    expect(location.pathname).toBe('/public/core.build.js');
+    history.pushState({name: 2}, '', '#/page_1');
+    function onHashChange(e: HashChangeEvent) {
+      expect(new URL(e.oldURL).hash).toBe('#/page_1');
+      expect(new URL(e.newURL).hash).toBe('#hash=hashValue');
+      window.removeEventListener('hashchange', onHashChange);
+      done();
+    }
+    window.addEventListener('hashchange', onHashChange);
+    requestAnimationFrame(() => {
+      history.back();
+    });
+  });
+
+  it('hashchange when go back should work', (done) => {
+    expect(location.pathname).toBe('/public/core.build.js');
+    history.replaceState({name: 0}, '');
+    history.pushState({name: 2}, '', '#/page_1');
+    function onHashChange(e: HashChangeEvent) {
+      expect(new URL(e.oldURL).hash).toBe('#/page_1');
+      expect(new URL(e.newURL).hash).toBe('#hash=hashValue');
+      window.removeEventListener('popstate', onHashChange);
+      done();
+    }
+    window.addEventListener('hashchange', onHashChange);
+    requestAnimationFrame(() => {
+      history.go(-1);
+    });
+  });
 });

webf/lib/src/launcher/controller.dart

@@ -687,9 +687,24 @@ class WebFViewController implements WidgetsBindingObserver {
       WebFNavigationActionPolicy policy = await _delegate.dispatchDecisionHandler(action);
       if (policy == WebFNavigationActionPolicy.cancel) return;
 
+      String targetPath = action.target;
+
+      if (!Uri.parse(targetPath).isAbsolute) {
+        String base = rootController.url;
+        targetPath = rootController.uriParser!.resolve(Uri.parse(base), Uri.parse(targetPath)).toString();
+      }
+
+      if (action.target.trim().startsWith('#')) {
+        String oldUrl = rootController.url;
+        HistoryModule historyModule = rootController.module.moduleManager.getModule('History')!;
+        historyModule.pushState(null, url: targetPath);
+        window.dispatchEvent(HashChangeEvent(newUrl: targetPath, oldUrl: oldUrl));
+        return;
+      }
+
       switch (action.navigationType) {
         case WebFNavigationType.navigate:
-          await rootController.load(rootController.getPreloadBundleFromUrl(action.target) ?? WebFBundle.fromUrl(action.target));
+          await rootController.load(rootController.getPreloadBundleFromUrl(targetPath) ?? WebFBundle.fromUrl(targetPath));
           break;
         case WebFNavigationType.reload:
           await rootController.reload();

webf/lib/src/module/history.dart

@@ -70,11 +70,19 @@ class HistoryModule extends BaseModule {
       _nextStack.removeFirst();
       _previousStack.addFirst(currentItem);
       _dispatchPopStateEvent(currentItem.state);
+
+      String previousUrl = currentItem.bundle.url;
+      if (_isFragmentItem(currentItem)) {
+        _dispatchHashChangeEvent(previousUrl, _previousStack.first.bundle.url);
+      }
     }
   }
 
   void go(num? num) {
     num ??= 0;
+
+    HistoryItem currentItem = _previousStack.first;
+
     if (num >= 0) {
       if (_nextStack.length < num) {
         return;
@@ -98,6 +106,9 @@ class HistoryModule extends BaseModule {
     }
 
     _dispatchPopStateEvent(_previousStack.first.state);
+    if (_isFragmentItem(currentItem)) {
+      _dispatchHashChangeEvent(currentItem.bundle.url, _previousStack.first.bundle.url);
+    }
   }
 
   void _dispatchPopStateEvent(state) {