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Blizzard
2026-03-05 09:08:21 +08:00
commit 0a61c4ddec
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export default class Bus{constructor(){this.listeners=new Map,this.emitted=new Set}on(t,e){if(this.emitted.has(t))return void e();const s=this.listeners.get(t)||[];s.push(e),this.listeners.set(t,s)}emit(t){const e=this.listeners.get(t);e&&e.forEach(t=>t()),this.emitted.add(t)}}