How to implement a complete event system with Javascript?

Question

I\'m creating a client-side dynamic blog engine. Now I need a event system to handle many actions from DOM elements and the engine. Such as the engine is loading a article,user

Answer 1

class SimpleEvent {
  constructor() {
    this.onEvent = {}
    this.handler = function(funct, name) {
      var owner = this
      var name = name
      this.onEvent[name] = funct
      var remove = function() {
        delete this.owner.onEvent[this.name]
        delete this.owner
        delete this.name
        delete this.remove
      }
      if ((((!(remove == undefined && name == undefined)) && (remove == undefined || name == undefined)))) {
        throw new Error("-_-")
      } else {
        return (remove == undefined || name == undefined) ? (undefined) : ({
          remove: remove,
          name: name
        })
      }
    }
  }
  Fire() {
    for (var i in this.onEvent) {
      this.onEvent[i](arguments)
    }
  }
}