Upgraded app to Laravel 5.7

resources/js/services/events.js

@@ -0,0 +1,28 @@
+/**
+ * Simple global events manager
+ */
+class Events {
+    constructor() {
+        this.listeners = {};
+        this.stack = [];
+    }
+
+    emit(eventName, eventData) {
+        this.stack.push({name: eventName, data: eventData});
+        if (typeof this.listeners[eventName] === 'undefined') return this;
+        let eventsToStart = this.listeners[eventName];
+        for (let i = 0; i < eventsToStart.length; i++) {
+            let event = eventsToStart[i];
+            event(eventData);
+        }
+        return this;
+    }
+
+    listen(eventName, callback) {
+        if (typeof this.listeners[eventName] === 'undefined') this.listeners[eventName] = [];
+        this.listeners[eventName].push(callback);
+        return this;
+    }
+}
+
+export default Events;