jquery-scrollstop

$(window)
  .on("scrollstart", function() {
    // Paint the world yellow when scrolling starts.
    $(document.body).css({background: "yellow"});
  })
  .on("scrollstop", function() {
    // Paint it all green when scrolling stops.
    $(document.body).css({background: "green"});
  });

https://github.com/ssorallen/jquery-scrollstop

开始滚动和停止滚动的时候 会发出事件