Plugin method undefined

Question

I am trying to create my first plugin, and when I add an item the

add

function called, so the object logged, but get error about

onAdd is undefined

(see below)

Here is the plugin

    $(function () {

    var settings = {

        onAdd: function () {},

        onRemove: function () {},

        sourceSelecter: null,

        targetSelector: null

    };



    $.fn.tokenizer = function (options) {



        settings = $.extend({

            targetSelector: this,

            idName: 'id'

        }, options);



        this.add = function (item) {

            console.log (settings)

            settings.onAdd.call(item);

        };



        this.remove = function (item) {

            settings.onRemove.call(item);

        };

        return this;

    };

}(jQuery));

Here is the console:

Object { targetSelector: Object, idName: "id", sourceSelector: "group" }

TypeError: settings.onAdd is undefined

Can somebody enlighened me, why is there no

onAdd

function in my

settings

?

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Answer 1

You are not including original settings object when you extending it. Also I advise you to create this.settings field to keep default settings separate:

$(function() {
  var settings = {
    onAdd: function() {},
    onRemove: function() {},
    sourceSelecter: null,
    targetSelector: null
  };

  $.fn.tokenizer = function(options) {
    this.settings = $.extend({}, {
      targetSelector: this,
      idName: 'id'
    }, settings, options);

    this.add = function(item) {
      console.log(this.settings)
      this.settings.onAdd.call(item);
    };

    this.remove = function(item) {
      this.settings.onRemove.call(item);
    };
    return this;
  };
}(jQuery));

Plugin method undefined

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