@cloudroom/electron-rtcsdk/observer.js

这是一款在线音视频SDK插件，您可以从README.md中获取演示demo

class Observer {
	constructor() {
		this.publisher = {};
	}

	_on(event, func, type) {
		if (typeof event === "string" && typeof func === "function") {
			let pubs = this.publisher[event];
			!pubs && (pubs = this.publisher[event] = []);
			pubs.push({
				type,
				func
			});
		} else {
			throw new Error("");
		}
	}

	on(event, func) {
		this._on(event, func, "on");
	}

	once(event, func) {
		this._on(event, func, "once");
	}

	emit(event, ...payload) {
		const pubs = this.publisher[event];
		if(pubs && pubs.length > 0){
			pubs.forEach((subscriber) => {
				const { func, type } = subscriber;
				try {
					func(...payload);
				} catch (error) {
					console.error(error)
				}
				type === "once" && this.off(event, subscriber);
			});
		}/*  else {
			console.log(`${event} 未定义`)	
		} */
	}

	off(event, sub) {
		if (event === '*') {
			this.publisher = {};
		} else {
			const pubs = this.publisher[event];
			pubs &&
				(this.publisher[event] = pubs.filter((subscriber) => subscriber.func !== sub));
		}
	}
}

// export default Observer;
// export const EventBus = (id) => {
// 	if (!EventBus[id]) {
// 		EventBus[id] = new Observer();
// 	}
// 	return EventBus[id];
// };
module.exports = Observer;