Event listener add multiple simultaneous.

add-event-listeners.js

Object.defineProperty(self || this, 'addEventListeners', {
	value: function addEventListeners(target, listeners, opts = {}) {
		if (listeners === undefined)
			return addEventListeners(this, target, opts)
		if ('function' === typeof opts.init) opts.init.call(target)
		if (opts.addSelf) Object.defineProperty(target, 'string' === typeof opts.addSelf ? opts.addSelf : addEventListeners.name, {
				enumerate: true,
				value: addEventListeners
		})
		for (const listener in listeners)
			if (listeners.hasOwnProperty(listener))
				target.addEventListener(listener, listeners[listener], opts)
		return {target, listeners, opts}
	},
	enumerable: true
})

add-my-listeners.js

let j = addEventListers({
  popstate(pop) {
    console.log(pop)
  },
  load() {
    console.log('load fire')
    addEventListeners(document, {}, {addSelf: 'on'})
  }
})