EventEmitter on closures

tshemsedinov · tshemsedinov · commit 51c72bfdab50 · 2018-01-24T21:43:49.000+02:00
diff --git a/JavaScript/examples/6-closure.js b/JavaScript/examples/6-closure.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const emitter = () => {
+  const events = {};
+  return {
+    on: (name, fn) => {
+      const event = events[name] || [];
+      events[name] = event;
+      event.push(fn);
+    },
+    emit: (name, data) => {
+      const event = events[name];
+      if (event) event.forEach(fn => fn(data));
+    }
+  };
+};
+
+const ee = emitter();
+
+ee.on('smth', (data) => {
+  console.dir(data);
+});
+
+ee.emit('smth', { a: 5 });
