24 lines
544 B
JavaScript
24 lines
544 B
JavaScript
|
class EventEmitter {
|
||
|
|
constructor() {
|
||
|
|
this.handlers = {}
|
||
|
|
}
|
||
|
|
|
||
|
|
emit(event) {
|
||
|
|
this.handlers[event]?.forEach(h => h());
|
||
|
|
}
|
||
|
|
|
||
|
|
addHandler(event, handler) {
|
||
|
|
if(!this.handlers[event]) {
|
||
|
|
this.handlers[event] = [handler];
|
||
|
|
} else {
|
||
|
|
this.handlers[event].push(handler);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
const emitter = new EventEmitter();
|
||
|
|
emitter.addHandler("start", () => console.log("Started!"));
|
||
|
|
emitter.addHandler("end", () => console.log("Ended!"));
|
||
|
|
emitter.emit("end");
|
||
|
|
emitter.emit("start");
|