jQuery实现新浪微博自动底部加载的方法

新浪微博网页自动底部加载的效果很酷吧？其实这种叫做“无限滚动的翻页技术”，当你页面滑到列表底部时候无需点击就自动加载更多的内容。

其实有很多jQuery的插件都已经实现了这个效果，我们来介绍几个吧！

1、jQuery ScrollPagination

jQuery ScrollPagination plugin 是一个jQuery 实现的支持无限滚动加载数据的插件。

实例代码：

  $(function(){
                $('#content').scrollPagination({
                    'contentPage': 'democontent.html', // the url you are fetching the results
                    'contentData': {}, // these are the variables you can pass to the request, for example: children().size() to know which page you are
                    'scrollTarget': $(window), // who gonna scroll? in this example, the full window
                    'heightOffset': 10, // it gonna request when scroll is 10 pixels before the page ends
                    'beforeLoad': function(){ // before load function, you can display a preloader div
                        $('#loading').fadeIn();
                    },
                    'afterLoad': function(elementsLoaded){ // after loading content, you can use this function to animate your new elements
                         $('#loading').fadeOut();
                         var i = 0;
                         $(elementsLoaded).fadeInWithDelay();
                         if ($('#content').children().size() > 100){ // if more than 100 results already loaded, then stop pagination (only for testing)
                            $('#nomoreresults').fadeIn();
                            $('#content').stopScrollPagination();
                         }
                    }
                });

                // code for fade in element by element
                $.fn.fadeInWithDelay = function(){
                    var delay = 0;
                    return this.each(function(){
                        $(this).delay(delay).animate({opacity:1}, 200);
                        delay += 100;
                    });
                };
                      
            });

2、 jQuery Screw

Screw (scroll + view) 是一个 jQuery 插件当用户滚动页面的时候加载内容，是一个无限滚动翻页的插件。

3. AutoBrowse jQuery Plugin

Autobrowse jQuery Plugin 插件在用户滚动页面的时候自动通过 Ajax 加载更多内容，使用浏览器内置缓存。