Show every event that is emitted

ee-debug.js

'use strict'

const EE = require('events')
const emit = EE.prototype.emit
EE.prototype.emit = function(name, ...args) {
  if (this.constructor) {
    console.log('EMIT', this.constructor.name, name)
  } else {
    console.log('EMIT', '<unknown>', name)
  }
  return emit.call(this, name, ...args)
}

Instead of using node index.js, now, run with node -r ./ee-debug.js index.js