Event Emitter JavaScript/NodeJS - Speed code
What is Event Emitter in JavaScript/NodeJS?
In Node.js, the EventEmitter utility class enables you to handle and emit events in JavaScript applications. It offers a means of putting into practice the Observer pattern, in which an object (the "emitter") keeps track of a list of "listeners" and alerts them when changes or events take place.
You can declare events in an EventEmitter by name and then activate them by emitting them. The functions that will be invoked when the event is emitted can also have listeners attached to them. Multiple listeners may be associated with the same event and listeners may be dynamically added or withdrawn.
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