addEventListener is not working on click

Question

Clicking on a button does not seem to do any action,i could not figure out what is wrong.Please help me find the same.

 Menu.prototype._initToggleEvents = function() {
    var scope = this;
    this.toggle.addEventListener( "click", function() {
      (scope.menuPosition == "off") ? scope._toggleMenuOn() : scope._toggleMenuOff();
    });
  };

Here is the plunker example : https://plnkr.co/edit/6kd2ZWc1iLJ2q1OPiiIM?p=preview

Answer 1

好吧，我发现从错误的位置触发插件会导致addEventListener不被调用，在body标签关闭之前将脚本移动就可以解决问题。