最近项目中要实现当页面还没有加载完给用户提示正在加载的loading，本来是想做个图片提示的，但是图片如果放大电脑的分辨率就会感觉到很虚，体验效果很不好。于是就采用css3+js实现这个loading的动画效果，最终在我们前端工程师的帮助之下完成。所以记录在这里，如果感兴趣的朋友也可以看看，大家互相焦炉学习。
1、demo.html
<!DOCTYPE html>
<html>
<head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8"> <link rel="stylesheet" type="text/css" href="./loaders.css">
<title>纯css3 加载loading动画特效</title> </head>
<body> <style>
body{width:100%;height:100%;margin:0;}
.fuceng{position:absolute;width:100%;height:100%;margin:0;}
.loading{margin-left: 50%; margin-top:20%;}
</style> <div>
<div class="fuceng">
<div class="loading">
<div class="loader-inner line-spin-fade-loader">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
</div>
</div>
</body>
</html>
2、loaders.css
/**
*
* All animations must live in their own file
* in the animations directory and be included
* here.
*
*/
/**
* Styles shared by multiple animations
*/
/**
*/
.ball-spin-fade-loader {
position: relative; }
.ball-spin-fade-loader > div:nth-child(1) {
top: 25px;
left: 0;
-webkit-animation: ball-spin-fade-loader 1s 0s infinite linear;
animation: ball-spin-fade-loader 1s 0s infinite linear; }
.ball-spin-fade-loader > div:nth-child(2) {
top: 17.04545px;
left: 17.04545px;
-webkit-animation: ball-spin-fade-loader 1s 0.12s infinite linear;
animation: ball-spin-fade-loader 1s 0.12s infinite linear; }
.ball-spin-fade-loader > div:nth-child(3) {
top: 0;
left: 25px;
-webkit-animation: ball-spin-fade-loader 1s 0.24s infinite linear;
animation: ball-spin-fade-loader 1s 0.24s infinite linear; }
.ball-spin-fade-loader > div:nth-child(4) {
top: -17.04545px;
left: 17.04545px;
-webkit-animation: ball-spin-fade-loader 1s 0.36s infinite linear;
animation: ball-spin-fade-loader 1s 0.36s infinite linear; }
.ball-spin-fade-loader > div:nth-child(5) {
top: -25px;
left: 0;
-webkit-animation: ball-spin-fade-loader 1s 0.48s infinite linear;
animation: ball-spin-fade-loader 1s 0.48s infinite linear; }
.ball-spin-fade-loader > div:nth-child(6) {
top: -17.04545px;
left: -17.04545px;
-webkit-animation: ball-spin-fade-loader 1s 0.6s infinite linear;
animation: ball-spin-fade-loader 1s 0.6s infinite linear; }
.ball-spin-fade-loader > div:nth-child(7) {
top: 0;
left: -25px;
-webkit-animation: ball-spin-fade-loader 1s 0.72s infinite linear;
animation: ball-spin-fade-loader 1s 0.72s infinite linear; }
.ball-spin-fade-loader > div:nth-child(8) {
top: 17.04545px;
left: -17.04545px;
-webkit-animation: ball-spin-fade-loader 1s 0.84s infinite linear;
animation: ball-spin-fade-loader 1s 0.84s infinite linear; }
.ball-spin-fade-loader > div {
background-color: #279fcf;
width: 15px;
height: 15px;
border-radius: 100%;
margin: 2px;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
position: absolute; } @-webkit-keyframes line-spin-fade-loader {
50% {
opacity: 0.3; } 100% {
opacity: 1; } } @keyframes line-spin-fade-loader {
50% {
opacity: 0.3; } 100% {
opacity: 1; } } .line-spin-fade-loader {
position: relative; }
.line-spin-fade-loader > div:nth-child(1) {
top: 20px;
left: 0;
-webkit-animation: line-spin-fade-loader 1.2s 0.12s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.12s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(2) {
top: 13.63636px;
left: 13.63636px;
-webkit-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.24s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.24s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(3) {
top: 0;
left: 20px;
-webkit-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(90deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.36s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.36s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(4) {
top: -13.63636px;
left: 13.63636px;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.48s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.48s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(5) {
top: -20px;
left: 0;
-webkit-animation: line-spin-fade-loader 1.2s 0.6s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.6s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(6) {
top: -13.63636px;
left: -13.63636px;
-webkit-transform: rotate(-45deg);
-ms-transform: rotate(-45deg);
transform: rotate(-45deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.72s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.72s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(7) {
top: 0;
left: -20px;
-webkit-transform: rotate(90deg);
-ms-transform: rotate(90deg);
transform: rotate(90deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.84s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.84s infinite ease-in-out; }
.line-spin-fade-loader > div:nth-child(8) {
top: 13.63636px;
left: -13.63636px;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
-webkit-animation: line-spin-fade-loader 1.2s 0.96s infinite ease-in-out;
animation: line-spin-fade-loader 1.2s 0.96s infinite ease-in-out; }
.line-spin-fade-loader > div {
background-color: #279fcf;
width: 4px;
height: 35px;
border-radius: 2px;
margin: 2px;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
position: absolute;
width: 5px;
height: 15px; }
3、效果图