@@ -0,0 +1,11 @@
+'use strict';
+
+const EventEmitter = require('node:events');
+
+const emitter = new EventEmitter();
+
+emitter.on('name', (data) => {
+  console.dir({ data });
+});
+
+emitter.emit('name', { a: 5 });
@@ -0,0 +1,25 @@
+'use strict';
+
+class EventEmitter {
+  events = {};
+
+  on(name, fn) {
+    const event = this.events[name];
+    if (event) event.push(fn);
+    else this.events[name] = [fn];
+  }
+
+  emit(name, ...data) {
+    const event = this.events[name];
+    if (!event) return;
+    for (const listener of event) listener(...data);
+  }
+}
+
+const emitter = new EventEmitter();
+
+emitter.on('name', (data) => {
+  console.dir({ data });
+});
+
+emitter.emit('name', { a: 5 });