先上效果图：
水波动画：
边框动画：
1.水波动画
实现代码
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>水波动画</title> 6 <style> 7 .water{ 8 width: 50px; 9 height: 50px; 10 position: relative; 11 } 12 .point{ 13 position: absolute; 14 border-radius: 50%; 15 animation:border 2s linear infinite; 16 } 17 .point2{ 18 -webkit-animation-delay:.5s; 19 } 20 .point3{ 21 -webkit-animation-delay:1s; 22 } 23 .point4{ 24 -webkit-animation-delay:1.5s; 25 } 26 27 @keyframes border{ 28 from { 29 width:0; 30 height:0; 31 top:50%; 32 left:50%; 33 background-color: rgba(235, 51, 36, 1); 34 } 35 to { 36 width:100%; 37 height:100%; 38 top:0; 39 left:0; 40 background-color: rgba(235, 51, 36, 0); 41 } 42 } 43 </style> 44 </head> 45 <body> 46 <div class="water"> 47 <div class="point point1"></div> 48 <div class="point point2"></div> 49 <div class="point point3"></div> 50 <div class="point point4"></div> 51 </div> 52 </body> 53 </html>
2.边框动画:
实现代码
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>边框动画</title> 6 <style> 7 .block{ 8 width: 100px; 9 height: 50px; 10 position: relative; 11 background-color: #fcfcfc; 12 overflow: hidden; 13 } 14 .block:before{ 15 content: ''; 16 width: 0; 17 height: 0; 18 top: 0; 19 left: -1px; 20 display: block; 21 border-top: 1px solid red; 22 border-right: 1px solid red; 23 position: absolute; 24 z-index: 1; 25 } 26 .block:hover:before{ 27 content: ''; 28 width: 100%; 29 height: 100%; 30 border-radius: 5px; 31 animation: border .5s linear 1; 32 } 33 .block:after{ 34 content: ''; 35 width: 0; 36 height: 0; 37 bottom: 0; 38 right: -1px; 39 display: block; 40 position: absolute; 41 z-index: 1; 42 border-bottom: 1px solid red; 43 border-left: 1px solid red; 44 } 45 .block:hover:after{ 46 content: ''; 47 width: 100%; 48 height: 100%; 49 border-radius: 5px; 50 animation: border2 1s linear 1; 51 } 52 @keyframes border{ 53 0%{ 54 width: 0; 55 height: 0; 56 } 57 50%{ 58 width: 100%; 59 height: 0; 60 } 61 100%{ 62 width: 100%; 63 height: 100%; 64 } 65 66 } 67 @keyframes border2{ 68 0%{ 69 width: 0; 70 height: 0; 71 } 72 50%{ 73 width: 0; 74 height: 0; 75 } 76 75%{ 77 width: 100%; 78 height: 0; 79 } 80 100%{ 81 width: 100%; 82 height: 100%; 83 } 84 } 85 </style> 86 </head> 87 <body> 88 <div class="block"></div> 89 </body> 90 </html>