Check for Node + Dart2JS.

Author: elliotwutingfeng

lib/src/core/random_bytes_js.dart

@@ -3,6 +3,29 @@ import 'dart:typed_data';
 
 import 'package:ipcrypt/src/core/random_bytes_vm.dart' as vm;
 
+const bool isWASM = bool.fromEnvironment('dart.tool.dart2wasm');
+
+@JS()
+@staticInterop
+class Process {}
+
+@JS()
+@staticInterop
+class Versions {}
+
+@JS('process')
+external Process? get _process;
+
+extension on Process {
+  external Versions? get versions;
+}
+
+extension on Versions {
+  external JSAny get node;
+}
+
+bool get isNodeDart2JS => _process?.versions?.node != null && !isWASM;
+
 @JS()
 external NodeCrypto require(final String id);
 
@@ -11,12 +34,6 @@ extension type NodeCrypto._(JSObject _) implements JSObject {
 }
 
 /// Generate [size] cryptographically secure random bytes.
-Uint8List randomBytes(final int size) {
-  try {
-    // Web browser (more commonly used Dart platform than Node.js)
-    return vm.randomBytes(size);
-  } catch (_) {
-    // Node.js
-    return require('crypto').randomBytes(size).toDart;
-  }
-}
+Uint8List randomBytes(final int size) => isNodeDart2JS
+    ? require('crypto').randomBytes(size).toDart
+    : vm.randomBytes(size);