Update README.md

README.md

@@ -1,2 +1,29 @@
 # event-emitter-target
 用函数式编程写成的发布订阅事件机制模块
+
+# API
+
+```ts
+type EventEmitterTarget = ReturnType<typeof createeventtarget>;
+declare function createorclass(this: EventEmitterTarget | undefined): EventEmitterTarget;
+type EVENTNAME = string | symbol;
+type EVENTLISTENER = (event?: any) => void;
+declare function createeventtarget(): {
+    [Symbol.toStringTag]: string;
+    listenerCount: (name: EVENTNAME) => number;
+    clear: (name: EVENTNAME) => void;
+    removeAllListeners: (name: EVENTNAME) => void;
+    on: (name: EVENTNAME, callback: EVENTLISTENER) => void;
+    addListener: (name: EVENTNAME, callback: EVENTLISTENER) => void;
+    off: (name: EVENTNAME, callback: EVENTLISTENER) => void;
+    removeListener: (name: EVENTNAME, callback: EVENTLISTENER) => void;
+    once: (name: EVENTNAME, callback: EVENTLISTENER) => void;
+    emit: (name: EVENTNAME, event?: any) => void;
+    dispatch: (name: EVENTNAME, event?: any) => void;
+    eventNames: () => EVENTNAME[];
+    listeners: (name: EVENTNAME) => EVENTLISTENER[];
+};
+declare const a: typeof createorclass;
+export { a as default };
+
+```