upd

lib/src/connection.dart

@@ -1 +1,48 @@
-class Connection {}
+import 'dart:js_interop';
+import 'dart:js_util';
+
+import 'package:deno_postgres_interop/src/client_configuration.dart';
+import 'package:deno_postgres_interop/src/promise.dart';
+import 'package:deno_postgres_interop/src/transport.dart';
+import 'package:deno_postgres_interop/src/util.dart';
+
+/// [[email protected]/Connection](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection).
+@JS()
+class Connection {
+  /// [[email protected]/Connection/connected](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#accessor_pid).
+  external int get pid;
+
+  /// [[email protected]/Connection/constructor](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#ctor_0).
+  factory Connection({
+    required ClientConfiguration connectionParams,
+    required Future<void> Function() disconnectionCallback,
+  }) =>
+      callConstructor(
+        'Connection',
+        [connectionParams, () => futureToPromise(disconnectionCallback())],
+      );
+}
+
+/// [[email protected]/Connection](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection).
+extension ConnectionProps on Connection {
+  /// [[email protected]/Connection/connected](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#prop_connected).
+  bool get isConnected => getProperty(this, 'connected');
+
+  /// [[email protected]/Connection/tls](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#accessor_tls).
+  bool get isCarriedOverTLS => getProperty(this, 'tls');
+
+  /// [[email protected]/Connection/transport](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#accessor_transport).
+  Transport get transport => Transport.parse(getProperty(this, 'transport'));
+
+  /// [[email protected]/Connection/end](https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#method_end_0).
+  Future<void> end() => callFutureMethod(this, 'end');
+
+  // https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#method_query_0
+  // query(query: Query<ResultType.ARRAY>): Promise<QueryArrayResult>
+
+  // https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#method_query_1
+  // query(query: Query<ResultType.OBJECT>): Promise<QueryObjectResult>
+
+  // https://deno.land/x/[email protected]/connection/connection.ts?s=Connection#method_startup_0
+  // startup(is_reconnection: boolean)
+}

lib/src/pool.dart

@@ -1,3 +1,4 @@
+import 'dart:js_interop';
 import 'dart:js_util';
 
 import 'package:deno_postgres_interop/src/client_options.dart';
@@ -6,6 +7,7 @@ import 'package:deno_postgres_interop/src/undefined.dart';
 import 'package:deno_postgres_interop/src/util.dart';
 
 /// [[email protected]/Pool](https://deno.land/x/[email protected]/mod.ts?s=Pool).
+@JS()
 class Pool {
   /// [[email protected]/Pool/constructor](https://deno.land/x/[email protected]/mod.ts?s=Pool#ctor_0).
   factory Pool({