miniprogram/core/Emitter.ts

@@ -13,10 +13,6 @@ export type EventHandlerMap<Events extends Record<EventType, any>> = Map<
 	EventHandlerList<Events[keyof Events]>
 >;
 
-// Emitter function type
-type IEmitParamType<E extends Record<EventType, any>, K extends keyof E> = 
-	E[K] extends ( undefined | void ) ? [K] : [K, E[K]];
-
 export class Emitter<Events extends Record<EventType, any>> {
 	
 	/**
@@ -78,8 +74,7 @@ export class Emitter<Events extends Record<EventType, any>> {
 	 * @param {Any} [evt] Any value (object is recommended and powerful), passed to each handler
 	 * @memberOf mitt
 	 */
-	public emit<Key extends keyof Events>(...param: IEmitParamType<Events, Key>): this {
-		const [ type, evt ] = param;
+	emit<Key extends keyof Events>(type: Key, evt: Events[Key]) {
 		let handlers = this.all!.get(type);
 		if (handlers) {
 			(handlers as EventHandlerList<Events[keyof Events]>)
@@ -88,6 +83,5 @@ export class Emitter<Events extends Record<EventType, any>> {
 					handler(evt!);
 				});
 		}
-		return this;
 	}
 }