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Module

std/node/_events.d.ts>EventEmitter#eventNames

Deno standard library
denoland/deno_std
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The Standard Library has been moved to JSR. See the blog post for details.
method EventEmitter.prototype.eventNames
import { EventEmitter } from "https://deno.land/std@0.128.0/node/_events.d.ts";

Returns an array listing the events for which the emitter has registered listeners. The values in the array are strings or Symbols.

const EventEmitter = require('events');
const myEE = new EventEmitter();
myEE.on('foo', () => {});
myEE.on('bar', () => {});

const sym = Symbol('symbol');
myEE.on(sym, () => {});

console.log(myEE.eventNames());
// Prints: [ 'foo', 'bar', Symbol(symbol) ]

Returns

Array<string | symbol>