Интегрирован wesp в сайт

WESP_REL/static/js/modules/cross-tab-sync.js

@@ -0,0 +1,27 @@
+export class CrossTabSync {
+  constructor(channelName) {
+    this._channel = null;
+    if (typeof BroadcastChannel !== "undefined") {
+      this._channel = new BroadcastChannel(channelName);
+    }
+  }
+
+  post(type, payload = {}) {
+    if (!this._channel) return;
+    this._channel.postMessage({ type, ...payload });
+  }
+
+  onMessage(handler) {
+    if (!this._channel) return () => {};
+    const wrapped = (event) => handler(event.data || {});
+    this._channel.addEventListener("message", wrapped);
+    return () => this._channel.removeEventListener("message", wrapped);
+  }
+
+  close() {
+    if (this._channel) {
+      this._channel.close();
+      this._channel = null;
+    }
+  }
+}