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EventEmitter.listenerCount - events - Node documentation
method EventEmitter.listenerCount

Usage in Deno

import { type EventEmitter } from "node:events";
EventEmitter.listenerCount<K>(
eventName: Key<K, T>,
listener?: Listener2<K, T>,
): number

Returns the number of listeners listening for the event named eventName. If listener is provided, it will return how many times the listener is found in the list of the listeners of the event.

Type Parameters

K

Parameters

eventName: Key<K, T>

The name of the event being listened for

optional
listener: Listener2<K, T>

The event handler function

Return Type

number