Сортирует «Предложения дня» по скидкам от большей к меньшей. Сортирует в блоке «Лидеры продаж и др.» по убыванию/возрастанию скидок (добавляет настройку сортировки «%▾»). ~~~ Для главной страницы летней распродажи 2014 http://store.steampowered.com/

steam-summer-sale-2014-sort-by-discounts.user.js

// ==UserScript==
// @name       Steam sort by discount
// @namespace  http://use.i.E.your.homepage/
// @version    0.1
// @description  Steam summer sale discount sorting 19/06/14 - 30/06/14
// @match      http://store.steampowered.com/
// @copyright  2014+, shtrih
// ==/UserScript==

function scriptBody($) {
    
    /**
     * @param a Element div.summersale_dailydeal_ctn
     * @param b -//-
     */
    function sortSummerPctDesc(a, b) {
        a = extractPercent(a);
        b = extractPercent(b);
        
        return (a > b ? -1 : (a < b ? 1 : 0));
    }
    
     /**
     * @param a Element div.summersale_dailydeal_ctn
     * @param b -//-
     */
    function sortSummerPctAsc(a, b) {
        a = extractPercent(a);
        b = extractPercent(b);
        
        return (a > b ? 1 : (a < b ? -1 : 0));
    }
    
    function extractPercent(summersale_dailydeal_ctn) {
        var match = $(summersale_dailydeal_ctn).find('.discount_pct').text().match(/-(\d+)%/);
        return match ? match[1] : 0;
    }
    
    /**
     * Summersale Tabs Sorting
     */
    var $summer_tabs_block = $('.summersale_tabs'),
        $tabs_links = $('.summersale_tab:not(.pct-sort)', $summer_tabs_block),
        $tabs_content = $summer_tabs_block.next(),
        get_active_tab_pages = function () {
            return $tabs_content.children().filter(':visible').first().find('.summersale_tabpage');
        },
        TAB_PAGE_LIMIT = 20,
        $summer_sort_pct_tab = $('<div class="summersale_tab pct-sort" title="Sort by discount">%</div>'),
        summer_separator = '<div class="summersale_tab_separator">|</div>',
    	
        $sort_direction = $('<span></span>'),
        SORT_DIRECTION_ASC = '▴',
        SORT_DIRECTION_DESC = '▾',
        current_sort = SORT_DIRECTION_DESC,
        sort_tabs_items = function ($elements, sort_direction) {     
            $sort_direction.text(sort_direction);
            
            return $elements.detach().sort(sort_direction === SORT_DIRECTION_ASC ? sortSummerPctAsc : sortSummerPctDesc);
        },
        fill_tab_pages = function ($tab_pages, $elements, limit) {
            $tab_pages.each(function() {
            	$(this).html($elements.splice(0, limit));
            });
        },
        sort_refresh = function () {
        	var $active_tab_pages = get_active_tab_pages(),
            	$active_tab_items = $active_tab_pages.children('.summersale_dailydeal_ctn'),
                $sorted_items = sort_tabs_items($active_tab_items, current_sort)
        	;
        
            fill_tab_pages($active_tab_pages, $sorted_items, TAB_PAGE_LIMIT);
        },
        sort_toggle = function () {
            var $active_tab_pages = get_active_tab_pages(),
                $active_tab_items = $active_tab_pages.children('.summersale_dailydeal_ctn'),
                $sorted_items
            ;
    
            current_sort = (current_sort === SORT_DIRECTION_DESC)
                ? SORT_DIRECTION_ASC 
                : SORT_DIRECTION_DESC
            ;
    		$sorted_items = sort_tabs_items($active_tab_items, current_sort);
            
            fill_tab_pages($active_tab_pages, $sorted_items, TAB_PAGE_LIMIT);
        }
    ;
    
    $summer_sort_pct_tab.append($sort_direction);
    $summer_tabs_block.children().last()
    	.before(
    		summer_separator
   		)
    	.before(
        	$summer_sort_pct_tab
    	)
    ;
    
    $summer_sort_pct_tab.on('click', function () {
		sort_toggle();
    });
    
    $tabs_links.on('click', function () {
    	setTimeout(sort_refresh, 150);
    });
    
    $tabs_links.filter('.active').trigger('click');
    
        
    /**
     * Daily Deals Sorting
     */
    var $daily_block = $('.summersale_dailydeals'),
        $daily_items = $('.summersale_dailydeal_ctn', $daily_block)
    ;
    
    $daily_block.html(
        sort_tabs_items($daily_items, SORT_DIRECTION_DESC)
    )
    .append('<div style="clear: both;"></div>');
    
    $daily_items.removeClass('last')
    	.filter(':nth-child(3n)').addClass('last')
    ;
}

var script = document.createElement('script');
script.textContent = '(' + scriptBody.toString() + ')($J)';
(document.head || document.documentElement).appendChild(script);
script.parentNode.removeChild(script);