jQuery实现切换字体大小的方法

$.fn.switchSize = function(settings) {

// defaults settings

settings = $.extend({

    container: 'body',

    arrSizeClass: ['small', 'medium', 'large'],

    defaultClass: 'medium',

    saveCookie: true

}, settings);

var $container = $(settings.container);

return this

    .each(function() {

        if ($.cookie('switchSize')) { 

        $container.addClass($.cookie('switchSize'));

        $(this).data("current", $.cookie('switchSize')) 

        }

    })

    .bind("click", function() {

        var pos;

        if ($(this).data("current")) {

        pos = jQuery.inArray($(this).data("current"), settings.arrSizeClass);

        } else {

        pos = jQuery.inArray(settings.defaultClass, settings.arrSizeClass);

        }

        if (pos >= 0) { //Found Class

        if (pos == settings.arrSizeClass.length - 1) { //Check if last

            $(this).data("current", settings.arrSizeClass[0]);

        } else {

            $(this).data("current", settings.arrSizeClass[pos + 1]);

        }

        } else {

        //To prevent error

        $(this).data("current", settings.arrSizeClass[0]);

        }

 

        $container.removeClass(settings.arrSizeClass[pos]).addClass($(this).data("current"));

 

        if (settings.saveCookie === true) {

        $.cookie('switchSize', $(this).data("current"), { expires: 365, path: '/' });

        }

    });

};