正确的位置来定义jquery插件中的选项

时间:2012-07-16 23:47:03

标签: javascript jquery jquery-plugins namespaces

我有一个使用命名空间(方法)的jQuery插件,还有一些默认选项,可以在初始化时覆盖。

我想知道定义和使用选项的最佳方法是在名称空间中使用此插件。

我最初在包装函数中使用$.fn.dropIt.settings来定义设置,但后来切换到在init方法中定义它们。然而,就范围而言,这是非常有限的。

以下是我的插件中的相关代码

(function($, window, document, undefined){
  var methods = {
      init: function(options)
      {
        var settings = $.extend({
          trigger: "hover",
          animation: 'slide', /* none, slide, fade, grow */
          easing: 'swing', /* swing, linear, bounce */
          speedIn: 400,
          speedOut: 400,
          delayIn: 0,
          delayOut: 0,
          initCallback: function(){},
          showCallback: function(){},
          hideCallback: function(){}
        }, options);

        $(this).each(function(index, ele){
          $ele = $(ele);
          $ele.addClass('dropit');
          //Attach event handlers to each list-item
          $('li', $ele).dropIt('attach', settings);

          //If list is displayed veritcally, add extra left padding to all sub-menus
          if($(ele).hasClass('vertical'))
          {
            $('li', $ele).find('ul').addClass('nested sub-menu');
          } else {
            $('li ul', $ele).addClass('nested').find('ul').addClass('sub-menu');
          }
        });

        //Call custom callback
        settings.initCallback.call();

        //Return jQuery collection of lists
        return $(this);
      },

      attach: ...

      _trigger: ...

      _hide: ...

      }
    };

  $.fn.dropIt = function(method){
    //Variables and Options
    var $this = $(this);
    // Method calling logic
    if ( methods[method] ) {
      return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
    } else if ( typeof method === 'object' || ! method ) {
      return methods.init.apply( this, arguments );
    } else {
      $.error( 'Method ' +  method + ' does not exist on jQuery.dropIt' );
    }
  };

})(jQuery, window, document);

2 个答案:

答案 0 :(得分:0)

在阅读jQuery Plugins/Authoring页面后,我基本上就像这样构建了插件:

(function ($) {
    var defaults = {
        // set default options
    }
    // internal functions
    var methods = {
        // plugin methods
    }
    $.fn.pluginName = function (method) {
    }
})(jQuery);

而且,就像你拥有的那样,$.extend是init方法中的默认值,但为了清楚起见,我想保持单独声明的默认值。它一直很适合我。

答案 1 :(得分:0)

我总是将设置对象设置为插件范围的全局变量,如下所示:

(function($, window, document, undefined){
  var settings; //NOTE THIS LINE

  var methods = {
      init: function(options)
      {
        settings = $.extend({ //AND THIS LINE
          trigger: "hover",
          animation: 'slide', /* none, slide, fade, grow */
          easing: 'swing', /* swing, linear, bounce */
          speedIn: 400,
          speedOut: 400,
          delayIn: 0,
          delayOut: 0,
          initCallback: function(){},
          showCallback: function(){},
          hideCallback: function(){}
        }, options);

        $(this).each(function(index, ele){
          $ele = $(ele);
          $ele.addClass('dropit');
          //Attach event handlers to each list-item
          $('li', $ele).dropIt('attach', settings);

          //If list is displayed veritcally, add extra left padding to all sub-menus
          if($(ele).hasClass('vertical'))
          {
            $('li', $ele).find('ul').addClass('nested sub-menu');
          } else {
            $('li ul', $ele).addClass('nested').find('ul').addClass('sub-menu');
          }
        });

        //Call custom callback
        settings.initCallback.call();

        //Return jQuery collection of lists
        return $(this);
      },

      attach: ...

      _trigger: ...

      _hide: ...

      }
    };

  $.fn.dropIt = function(method){
    //Variables and Options
    var $this = $(this);
    // Method calling logic
    if ( methods[method] ) {
      return methods[ method ].apply( this, Array.prototype.slice.call( arguments, 1 ));
    } else if ( typeof method === 'object' || ! method ) {
      return methods.init.apply( this, arguments );
    } else {
      $.error( 'Method ' +  method + ' does not exist on jQuery.dropIt' );
    }
  };

})(jQuery, window, document);

修改 你也可以$(this).data('youPlugInName', settings),然后如果你想改变它,你可以从data('yourPlugInName')检索它,并更新你想要的任何属性。