<pre class="shiki github-dark shaku"><code>// please complete the implementationclass EventEmitter { events = {}; subscribe(eventName, callback) { this.events[eventName] = this.events[eventName] || []; this.events[eventName].push(callback); return { release: () =&gt; { const idx = this.events[eventName].indexOf(callback); this.events[eventName] = [ ...this.events[eventName].splice(0, idx), ...this.events[eventName].splice(idx + 1), ]; } }; } emit(eventName, ...args) { 	this.events[eventName].forEach(cb =&gt; { cb(...args); }) }}</code></pre>

Straight-forward implementation

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There is Event Emitter in Node.js, Facebook once had its own implementation but now it is archived. You are asked to create an Event Emitter Class con…