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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | 1x 1x 1x 1x 1x 1x 1x 1x | class EventDispatcher { private readonly handlerMap = new Map(); public on<T = {}>(name: string, handler: (data?: T) => void): void { if (this.handlerMap.has(name)) { const handlers = this.handlerMap.get(name); handlers.push(handler); } else { this.handlerMap.set(name, [handler]); } } public off<T = {}>(name: string, handler?: (data?: T) => void): void { const handlers: Array<(data?: T) => void> = this.handlerMap .get(name) .filter((h: (data?: T) => void) => h !== handler); this.handlerMap.set(name, handlers); } public trigger<T = {}>(name: string, data?: T): void { const handlers = this.handlerMap.get(name); if (handlers) { handlers.forEach((handler: (data?: T) => void) => { handler(data); }); } } public tearDown(): void { this.handlerMap.clear(); } } export const eventDispatcher = new EventDispatcher(); |