随手练习了几个loading样式，以后看到有意思的loading样式也会补充上。样式的兼容性建议还是去w3c上看下属性的兼容性，至少我习惯这么多，当然，w3c中文网貌似很久很久没更新过了，可能更好的还是去google下。
我给出的代码一般会把浏览器前缀样式给省略，因为像动画的关键帧这样的需要前缀的属性会使贴出来的代码很长。
下面给出示意图和代码：
（1）两个小球：
1 <!doctype html> 2 <head> 3 <title>两个小球</title> 4 <style> 5 .loading-area { 6 position: fixed; 7 top: 50%; 8 left: 50%; 9 margin: -50px 0 0 -40px; 10 width: 80px; 11 height: 100px; 12 text-align: center; 13 border-radius: 4px; 14 background-color: rgba(0, 0, 0, .04); 15 } 16 17 .icon-ball:before, .icon-ball:after { 18 content: ''; 19 position: absolute; 20 display: inline-block; 21 top: 20px; 22 left: 50%; 23 margin-left: -7px; 24 width: 14px; 25 height: 14px; 26 border: 1px solid #999; 27 border-radius: 50%; 28 box-sizing: border-box; 29 background-color: #999; 30 /*-webkit-animation: loading 1.8s linear alternate infinite;*/ 31 animation: loading 1.8s linear alternate infinite; 32 } 33 34 .icon-ball:after { 35 top: 70px; 36 animation-name: another-loading; 37 border-color: rgba(0, 0, 0, .04); 38 background-color: rgba(0, 0, 0, .08); 39 } 40 41 @keyframes loading { 42 0% {top: 20px;} 43 100% {top: 70px;} 44 } 45 46 @keyframes another-loading { 47 0% {top: 70px;} 48 100% {top: 20px;} 49 } 50 </style> 51 </head> 52 <body> 53 <div class="loading-area icon-ball"> 54 </div> 55 </body> 56 </html>
（2）时钟：
<!doctype html> <head> <title>时钟</title> <style> .loading-area { position: fixed; top: 50%; left: 50%; margin: -50px 0 0 -40px; width: 80px; height: 100px; border-radius: 4px; background-color: rgba(0, 0, 0, .04); } .icon-timer { position: absolute; top: 50%; left: 50%; margin: -15px 0 0 -15px; width: 30px; height: 30px; border-radius: 50%; background-color: #fff; } .icon-timer:before, .icon-timer:after { content: ''; display: inline-block; position: absolute; bottom: 50%; left: 50%; margin-left: -1px; width: 2px; height: 8px; background-color: #333; -webkit-transform-origin: 50% 100%; -ms-transform-origin: 50% 100%; transform-origin: 50% 100%; /*transform-origin: center bottom;*/ } .icon-timer:before { /*-webkit-animation: hourhand 24s linear infinite;*/ animation: hourhand 24s linear infinite; } .icon-timer:after { height: 12px; /*-webkit-animation: minutehand 2s linear infinite;*/ animation: minutehand 2s linear infinite; } @keyframes hourhand { 0% {transform: rotate(0deg)} 100% {transform: rotate(360deg);} } @keyframes minutehand { 0% {transform: rotate(0deg)} 100% {transform: rotate(360deg);} } </style> </head> <body> <div class="loading-area"> <i class="icon-timer"></i> </div> </body> </html>
（3）、充电
<!doctype html> <head> <title>充电</title> <style> .loading-area { position: fixed; top: 50%; left: 50%; margin: -50px 0 0 -40px; width: 80px; height: 100px; border-radius: 4px; background-color: rgba(0, 0, 0, .04); } .icon-charge { position: absolute; top: 50%; left: 50%; margin: -10px 0 0 -20px; width: 40px; height: 20px; /*border: 1px solid #333;*/ border-radius: 4px; background-color: #fff; } .icon-charge:after { content: ''; display: inline-block; position: absolute; top: 0; left: 0; width: 0; height: 20px; border-radius: 4px; background-color: #ddd; /*-webkit-animation: charge 2s linear alternate infinite;*/ animation: charge 2s linear alternate infinite; } @keyframes charge { 0% {width: 0;} 100% {width: 40px; background-color: #3dec3a;} } .icon-charge:before { content: ''; position: absolute; top: -12px; left: -12px; width: 8px; height: 8px; background-color: #000; animation: move 8s ease infinite; } @keyframes move { 0% {top: -12px; left: -12px; transform: rotate(0deg); border-radius: 0;} 25% {top: -12px; left: 52px; transform: rotate(360deg); border-radius: 50%;} 50% {top: 32px; left: 52px; transform: rotate(0deg); border-radius: 0;} 75% {top: 32px; left: -12px; transform: rotate(360deg); border-radius: 50%;} 100% {top: -12px; left: -12px; transform: rotate(0deg); border-radius: 0;} } </style> </head> <body> <div class="loading-area"> <i class="icon-charge"></i> </div> </body> </html>