22 lines
967 B
TypeScript
22 lines
967 B
TypeScript
export declare type EventType = string | symbol;
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export declare type Handler<T = any> = (event?: T) => void;
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export declare type WildcardHandler = (type: EventType, event?: any) => void;
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export declare type EventHandlerList = Array<Handler>;
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export declare type WildCardEventHandlerList = Array<WildcardHandler>;
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export declare type EventHandlerMap = Map<EventType, EventHandlerList | WildCardEventHandlerList>;
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export interface Emitter {
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all: EventHandlerMap;
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on<T = any>(type: EventType, handler: Handler<T>): void;
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on(type: '*', handler: WildcardHandler): void;
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off<T = any>(type: EventType, handler: Handler<T>): void;
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off(type: '*', handler: WildcardHandler): void;
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emit<T = any>(type: EventType, event?: T): void;
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emit(type: '*', event?: any): void;
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}
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/**
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* Mitt: Tiny (~200b) functional event emitter / pubsub.
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* @name mitt
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* @returns {Mitt}
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*/
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export default function mitt(all?: EventHandlerMap): Emitter;
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