废话不多说，直接上代码，附用法，纯博主手写，看完后，觉得好左上角请点个赞,觉得不好的请留下您的建议，谢谢（此代码改版很方便，大家可以任意发挥）
（注意：如果不想自己写动画的，可以引入Animate.css 相信这个动画库大家都不陌生）
body{overflow-x: hidden;}
div{width: 100px;height: 100px;margin: 100px auto 0;background: red;}
<body>
<div class="dream" data-animate="bounceInUp,1s,linear"></div>
<div class="dream" data-animate="flash,2s,linear"></div>
<div class="dream" data-animate="pulse,1s,linear"></div>
<div class="dream" data-animate="rubberBand,1s,linear"></div>
<div class="dream" data-animate="shake,1s,linear"></div>
<div class="dream" data-animate="swing,1s,linear"></div>
<div class="dream" data-animate="tade,1s,linear"></div>
<div class="dream" data-animate="wobble,1s,linear"></div>
<div class="dream" data-animate="jello,1s,linear"></div>
<div class="dream" data-animate="bounceIn,1s,linear"></div>
<div class="dream" data-animate="bounceInDown,1s,linear"></div>
<div class="dream" data-animate="bounceInLeft,1s,linear"></div>
<div class="dream" data-animate="bounceInRight,1s,linear"></div>
<div class="dream" data-animate="bounceInUp,1s,linear"></div>
<div class="dream" data-animate="bounceOut,1s,linear"></div>
<div class="dream" data-animate="bounceOutDown,1s,linear"></div>
<div class="dream" data-animate="bounceOutLeft,1s,linear"></div>
<div class="dream" data-animate="bounceOutRight,1s,linear"></div>
<div class="dream" data-animate="bounceOutUp,1s,linear"></div>
<div class="dream" data-animate="fadeIn,1s,linear"></div>
<div class="dream" data-animate="fadeInDown,1s,linear"></div>
<div class="dream" data-animate="fadeInLeft,1s,linear"></div>
<div class="dream" data-animate="fadeInRight,1s,linear"></div>
<div class="dream" data-animate="fadeInUp,1s,linear"></div>
<div class="dream" data-animate="fadeInDownBig,1s,linear"></div>
<div class="dream" data-animate="fadeInLeftBig,1s,linear"></div>
<div class="dream" data-animate="fadeInRightBig,1s,linear"></div>
<div class="dream" data-animate="fadeInUpBig,1s,linear"></div>
<div class="dream" data-animate="flip,1s,linear"></div>
<div class="dream" data-animate="hinge,1s,linear"></div>
</body>
<script>
// 获取浏览器可见区域高度
var window_height = document.documentElement.clientHeight;
// 用户手动修改浏览器可见区域高度时修改变量
window.onresize = function () {
window_height = document.documentElement.clientHeight;
};
// 获取所需效果元素
var My_dream = document.getElementsByClassName('dream');
// 鼠标滚轮滚动执行方法
window.onscroll = function () {
my_animation()
};
// 用于第一屏没有滚动滚动条时触发一下
my_animation();
// 判断元素父集是否有已定位元素
function getOffsetTop(ele) {
var rtn = ele.offsetTop;
var o = ele.offsetParent;
while (o != null) {
rtn += o.offsetTop;
o = o.offsetParent;
}
return rtn;
}
// 滚动条等于0时执行第一屏效果
function my_animation() {
var _scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
// 效果方法
for (var k = 0; k < My_dream.length; k++) {
if (_scrollTop >= getOffsetTop(My_dream[k]) - window_height && _scrollTop <= getOffsetTop(My_dream[k])) {
My_dream[k].style.animationName = My_dream[k].dataset.animate.split(',')[0];
My_dream[k].style.animationDuration = My_dream[k].dataset.animate.split(',')[1];
My_dream[k].style.animationTimingFunction = My_dream[k].dataset.animate.split(',')[2];
}
}
}
</script>
用法很简单：
1)注意：没有自己写动画效果时，记得引入animate.css动画库
2)在想要添加动画的元素上添加class类名 dream
3)然后添加自定义属性 （ data-animate="动画名称,动画时间,动画速率" ），注意中间有 ","号隔开
4)加上后查看效果即可，使用前可以先复制博主代码查看下效果
（您的评价是对博主最大的鼓励，欢迎评价，觉得好左上角请点个赞，觉得不好的请留下您的建议，谢谢 (*￣︶￣) ）
入行没多久时写的 有点low 来优化一下代码重复
如果资金充裕，可以请我喝杯咖啡，谢谢 Thanks♪(･ω･)ﾉ
