backup. before shop update

lib/utils/iframe_web.dart

@@ -0,0 +1,39 @@
+
+import 'dart:html';
+
+import 'dart:ui' as ui;
+import 'package:flutter/material.dart';
+
+class IFrameWeb extends StatefulWidget {
+  final String width;
+  final String height;
+  final String src;
+
+  const IFrameWeb({this.width, this.height, this.src});
+
+  @override
+  State<StatefulWidget> createState() {
+    return IFrameWebState();
+  }
+}
+
+class IFrameWebState extends State<IFrameWeb> {
+  final IFrameElement _iframeElement = IFrameElement();
+
+  @override
+  Widget build(BuildContext context) {
+    _iframeElement.height = widget.height;
+    _iframeElement.width = widget.width;
+    _iframeElement.src = widget.src;
+    _iframeElement.style.border = 'none';
+    ui.platformViewRegistry.registerViewFactory(
+      'iframeElement',
+      (int viewId) => _iframeElement,
+    );
+    return HtmlElementView(
+      key: UniqueKey(),
+      viewType: 'iframeElement',
+    );
+  }
+
+}