Use a global key for internal anchors to ensure uniqueness without causing unneeded rebuilds

Author: erickok

example/ios/Podfile.lock

@@ -26,8 +26,8 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   Flutter: 434fef37c0980e73bb6479ef766c45957d4b510c
   video_player: 9cc823b1d9da7e8427ee591e8438bfbcde500e6e
-  wakelock: bfc7955c418d0db797614075aabbc58a39ab5107
-  webview_flutter: d2b4d6c66968ad042ad94cbb791f5b72b4678a96
+  wakelock: b0843b2479edbf6504d8d262c2959446f35373aa
+  webview_flutter: 9f491a9b5a66f2573946a389b2677987b0ff8c0b
 
 PODFILE CHECKSUM: 8e679eca47255a8ca8067c4c67aab20e64cb974d
 

lib/flutter_html.dart

@@ -49,7 +49,8 @@ class Html extends StatelessWidget {
     this.navigationDelegateForIframe,
   }) : document = null,
         assert (data != null),
-        super(key: key ?? UniqueKey());
+        anchorKey = GlobalKey(),
+        super(key: key);
 
   Html.fromDom({
     Key? key,
@@ -66,7 +67,11 @@ class Html extends StatelessWidget {
     this.navigationDelegateForIframe,
   }) : data = null,
         assert(document != null),
-        super(key: key ?? UniqueKey());
+  anchorKey = GlobalKey(),
+        super(key: key);
+
+  /// A unique key for this Html widget to ensure uniqueness of anchors
+  final Key anchorKey;
 
   /// The HTML data passed to the widget as a String
   final String? data;
@@ -119,7 +124,7 @@ class Html extends StatelessWidget {
     return Container(
       width: width,
       child: HtmlParser(
-        key: key,
+        key: anchorKey,
         htmlData: doc,
         onLinkTap: onLinkTap,
         onImageTap: onImageTap,