Refactor typeofEquals usage and remove isInstanceOfDomType

Closes #77

typeofEquals now takes a String and returns a bool, and
instanceOfString is the canonical replacement for isInstanceOfDomType.
Removes now unneeded test as well. Updates min SDK version.

Author: srujzs

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.2.2-wip
+
+- Updates SDK version minimum to 3.2.0-194.0.dev.
+
 ## 0.2.1-beta
 
 - `helpers.dart`

lib/helpers.dart

@@ -51,10 +51,3 @@ external JSFunction get _audioConstructor;
 HTMLAudioElement createAudioElement() => _audioConstructor.callAsConstructor();
 
 Element? querySelector(String selectors) => document.querySelector(selectors);
-
-bool isInstanceOfDomType(JSObject? o, String domType) {
-  if (o == null) return false;
-  final constructor = globalContext[domType];
-  if (constructor == null) return false;
-  return o.instanceof(constructor as JSFunction).toDart;
-}

lib/src/helpers/events/providers.dart

@@ -612,7 +612,7 @@ String _determineTransitionEventType(EventTarget e) {
 }
 
 String _determineVisibilityChangeEventType(EventTarget e) {
-  if (e.typeofEquals('undefined'.toJS).toDart) {
+  if (e.typeofEquals('undefined')) {
     return 'visibilitychange';
   } else if (e.hasProperty('mozHidden'.toJS).toDart) {
     return 'mozvisibilitychange';

pubspec.yaml

@@ -6,7 +6,7 @@ version: 0.2.1-beta
 repository: https://github.com/dart-lang/web
 
 environment:
-  sdk: ">=3.2.0-157.0.dev <4.0.0"
+  sdk: ">=3.2.0-194.0.dev <4.0.0"
 
 dev_dependencies:
   args: ^2.4.0