event_emitter.js
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event_emitter.js
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class EventEmitter {↵
events = {};↵
on(event, fn) {↵
(this.events[event] ??= []).push(fn);↵
}↵
emit(event, ...args) {↵
this.events[event]?.forEach(fn => fn(...args));↵
}↵
}
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