First commit

lib/EventBus.ts

@@ -0,0 +1,24 @@
+export type EventBusListener = {
+  id: string
+  handler: (...args: any[]) => void
+}
+
+export class EventBus {
+  listeners: Record<string, Array<EventBusListener>> = {}
+  on(name, handler) {
+    const id = Math.random().toString().slice(2)
+
+    this.listeners[name] = this.listeners[name] || ([] as Array<EventBusListener>)
+    this.listeners[name].push({id, handler})
+
+    return id
+  }
+  off(name, id) {
+    this.listeners[name] = this.listeners[name].filter(l => l.id !== id)
+  }
+  handle(k, ...payload) {
+    for (const {handler} of this.listeners[k] || []) {
+      handler(...payload)
+    }
+  }
+}

lib/main.ts

@@ -0,0 +1 @@
+export * from './EventBus'