arguments.callee is deprecated in strict mode for ecma 5

[choonkending]

Great library, love the amount of effort you guys have put in.

I was checking out src/js/utils/events.js.

once: function (el, type, callback) {
    var typeArray = type.split(' ');

    for (var i = typeArray.length - 1; i >= 0; i--) {
      el.addEventListener(typeArray[i], function(e) {
        e.target.removeEventListener(e.type, arguments.callee);
        return callback(e);
      });
    };
  }

MDN warns that arguments.callee is forbidden in strict mode here.

Would a solution as below be a better option? Thanks!

module.exports = {
    once: function(el, type, callback) {
        var typeArray = type.split(' ');
        var recursiveFunction = function(e){
            e.target.removeEventListener(e.type, recursiveFunction);
            return callback(e);
        };
        for(var i = typeArray.length - 1; i > 0; i--) {
            on(el, typeArray[i], recursiveFunction);
        }
    },
       // IE8+ Support
    on: function(el, type, callback) {
        if(el.addEventListener) {
            el.addEventListener(type, callback);
        } else {
            el.attachEvent('on' + type, function() {
                callback.call(el);
            });
        }
    },
       // IE8+ Support
    off: function(el, type, callback) {
        if(el.removeEventListener) {
            el.removeEventListener(type, callback);
        } else {
            el.detachEvent('on' + type, callback);
        }
    }
};

[hai-cea]

@choonkending Thanks for catching this. Would you like to submit a PR?

[choonkending]

@hai-cea Sure would! Will submit a PR soon.

[hai-cea]

This was fixed with #185