Nodejs HTML Element Event Add delegate(eventName, elementSelector, cb)

Method Source Code

Element.prototype.delegate = function(eventName, elementSelector, cb) {
  var _this = this

  _this.addEventListener(eventName, function(evt) {
    var _this = evt.target

    if (_this.is(elementSelector)) {
      cb.call(_this, evt)/*w  w  w  .  ja v  a  2 s  .c o  m*/
    }
    if (_this.parentNode.is(elementSelector)) {
      cb.call(_this.parentNode, evt)
    }
  })
}

Related

1. addEvent(event, callback, bubble)

   HTMLElement.prototype.addEvent = function (event, callback, bubble) {
       this.addEventListener(
           event,
           function (event) {
               try {
                   callback.apply(this, arguments);
               } catch (e) {
                   console.log(e);
               event.preventDefault();
               return false;
           },
           bubble);
   };
   

2. addClickEvent(func)

   HTMLElement.prototype.addClickEvent = function addClickEvent(func) {
       this.addEvent("click", func, false);
   };