correctly assign WebSocket constructor from ws in Node

Author: Mahad-10

lib/joiner.ts

@@ -1,14 +1,8 @@
 import {Joiner, ClientAuthenticator, Serializer, JSONSerializer} from 'wampproto';
 
-if (typeof globalThis.WebSocket === 'undefined') {
-    import('ws').then((ws) => {
-        (globalThis as any).WebSocket = ws.default;
-    });
-}
-
 import {BaseSession} from './types';
 import {getSubProtocol} from './helpers';
-
+import "./ws-shim"
 
 export class WAMPSessionJoiner {
     private readonly _authenticator?: ClientAuthenticator;

lib/ws-shim.ts

@@ -0,0 +1,11 @@
+// websocket-shim.ts
+if (typeof globalThis.WebSocket === "undefined") {
+    const isNode = typeof process !== "undefined" && process.versions?.node;
+    if (isNode) {
+        const { createRequire } = await import("module");
+        const require = createRequire(import.meta.url);
+
+        const ws = require("ws");
+        (globalThis as any).WebSocket = ws.WebSocket || ws;
+    }
+}