有时侯页面很长，需要指示箭头告诉用户下面还有东西。可以用纯CSS的方法实现。

HTML：添加一个链接，可修改锚点点击时滑动到指定位置，这里使用了Bootstrap 3.x版本的一个向下箭头作为图标。

<a href="#" class="scroll-down"> <span> <i class="glyphicon glyphicon-chevron-down"></i> </span></a>

CSS: 添加动画效果

@-webkit-keyframes drop { 0% { top:0px; opacity: 0;} 30% { top:10px; opacity: 1;} 100% { top:25px; opacity: 0;}}@keyframes drop { 0% { top:0px; opacity: 0;} 30% { top:10px; opacity: 1;} 100% { top:25px; opacity: 0;}}.scroll-down { border: 2px solid #bbb; border-radius: 50%; margin: 0 auto; height: 50px; width: 50px; display: block; text-align: center; z-index: 10; -webkit-transition: all 0.125s ease-in-out 0s; -moz-transition: all 0.125s ease-in-out 0s; -ms-transition: all 0.125s ease-in-out 0s; -o-transition: all 0.125s ease-in-out 0s; transition: all 0.125s ease-in-out 0s;}.scroll-down span { position: relative; color: #bbb; font-size: 24px; -webkit-animation-name: drop; -webkit-animation-duration: 1s; -webkit-animation-timing-function: linear; -webkit-animation-delay: 0s; -webkit-animation-iteration-count: infinite; -webkit-animation-play-state: running; animation-name: drop; animation-duration: 1s; animation-timing-function: linear; animation-delay: 0s; animation-iteration-count: infinite; animation-play-state: running;}

总结

以上所述是小编给大家介绍的使用CSS和Bootstrap图标制作上下跳动的指示箭头动画效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！