滚动到某个元素的末端才开始固定

很多时候,也许我们是需要在某个内容结束的位置接着出现固定,比如说侧栏固定内容,总得要侧栏的所有内容都看完了,才让他开始固定起来,否则就遮住了其他内容,效果就不太好了。代码如下:

<script type="text/javascript" src="js/scrollfix.min.js"></script>
<script type="text/javascript">
$(function(){
var fixStartBottom = $(".fix-startBottom");
fixStartBottom.scrollFix({startBottom:"#startBottom"});
})
</script>

这只是内容,效果看侧栏

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Perferendis, culpa, officia, tempore, et vel earum delectus obcaecati ducimus at voluptates odio aliquid quis nulla illo veniam non dolorem molestias voluptas!

这只是内容,效果看侧栏

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这只是内容,效果看侧栏

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这只是内容,效果看侧栏

这是#startBottom的末端这是#startBottom的末端这是#startBottom的末端这是#startBottom的末端
Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这只是内容,效果看侧栏

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这只是内容,效果看侧栏

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这是#fixFooter的位置

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?

这是距离底部300像素位置

Lorem ipsum dolor sit amet, consectetur adipisicing elit. Nesciunt, consequatur, dolorem eaque culpa ut iste tempora molestias repudiandae magni quo excepturi sapiente nisi reprehenderit omnis ea! Libero aspernatur fugit beatae?