Fix isWeb check for WASM (#1249)

Author: marandaneto

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- isWeb check for WASM ([#1249](https://github.com/getsentry/sentry-dart/pull/1249))
+
 ## 7.0.0-alpha.5
 
 ### Features

dart/lib/src/platform_checker.dart

@@ -3,10 +3,12 @@ import 'platform/platform.dart';
 /// Helper to check in which enviroment the library is running.
 /// The envirment checks (release/debug/profile) are mutually exclusive.
 class PlatformChecker {
-  const PlatformChecker({
+  static const _jsUtil = 'dart.library.js_util';
+
+  PlatformChecker({
     this.platform = instance,
-    this.isWeb = identical(0, 0.0),
-  });
+    bool? isWeb,
+  }) : isWeb = isWeb ?? _isWebWithWasmSupport();
 
   /// Check if running in release/production environment
   bool isReleaseMode() {
@@ -48,5 +50,12 @@ class PlatformChecker {
     return false;
   }
 
+  static bool _isWebWithWasmSupport() {
+    if (const bool.hasEnvironment(_jsUtil)) {
+      return const bool.fromEnvironment(_jsUtil);
+    }
+    return identical(0, 0.0);
+  }
+
   final Platform platform;
 }