Waypoints是一个jQuery用来实现捕获各种滚动事件的插件，例如实现无翻页的内容浏览，或者固定某个元素不让滚动等等。支持主流浏览器版本。-Waypoints is used to achieve a jQuery plugin capture various scroll events, for example, no page browser, or fixed an element not to scroll. Support mainstream browser version.