Support for dart:typed_data

lib/src/codegen/js_interop.dart

Index: lib/src/codegen/js_interop.dart
diff --git a/lib/src/codegen/js_interop.dart b/lib/src/codegen/js_interop.dart
index 73a03deb1bfa25b7b1fbf553bb59bcf754d12aa4..54fc8fccb35aaa5f30985d2637ceb3c38d5cb302 100644
--- a/lib/src/codegen/js_interop.dart
+++ b/lib/src/codegen/js_interop.dart
@@ -35,14 +35,25 @@ bool isJsSpreadInvocation(MethodInvocation i) =>
 bool isJSAnnotation(DartObjectImpl value) =>
     _isJsLibType('JS', value.type.element);
 
-/// Whether [value] is a `@JSExportName` (internal annotation used in SDK
-/// instead of `@JS` from `package:js`).
-bool isJSExportNameAnnotation(DartObjectImpl value) {
+bool _isBuiltinAnnotation(
+    DartObjectImpl value, String libraryName, String annotationName) {
   var e = value?.type?.element;
-  if (e?.name != 'JSExportName') return false;
+  if (e?.name != annotationName) return false;
   var uri = e.source.uri;
-  return uri.scheme == 'dart' && uri.path == '_foreign_helper';
+  var path = uri.pathSegments[0];
+  return uri.scheme == 'dart' && path == libraryName;
 }
 
+/// Whether [value] is a `@JSExportName` (internal annotation used in SDK
+/// instead of `@JS` from `package:js`).
+bool isJSExportNameAnnotation(DartObjectImpl value) =>
+    _isBuiltinAnnotation(value, '_foreign_helper', 'JSExportName');
+
+bool isJsName(DartObjectImpl value) =>
+    _isBuiltinAnnotation(value, '_js_helper', 'JSName');
+
 bool isJsPeerInterface(DartObjectImpl value) =>
-    value.type.name == 'JsPeerInterface';
+    _isBuiltinAnnotation(value, '_js_helper', 'JsPeerInterface');
+
+bool isNativeAnnotation(DartObjectImpl value) =>
+    _isBuiltinAnnotation(value, '_js_helper', 'Native');