本文给大家分享一段简单的代码实现css预加载动画效果，非常不错，具有参考借鉴价值，需要的的朋友参考下吧
效果图
<style> #loading { position:absolute; left:0; top:0; width:100%; height:100%; background: #121220; overflow:hidden; z-index:9999; } /*加载圈*/ .spinner { margin:0 auto; width:60px; height:60px; position:relative; top:40%; } .container1 > p,.container2 > p,.container3 > p { width:15px; height:15px; background-color:#fff; border-radius:100%; position:absolute; -webkit-animation:bouncedelay 1.2s infinite ease-in-out; animation:bouncedelay 1.2s infinite ease-in-out; -webkit-animation-fill-mode:both; animation-fill-mode:both; } .spinner .spinner-container { position:absolute; width:100%; height:100%; } .container2 { -webkit-transform:rotateZ(45deg); transform:rotateZ(45deg); } .container3 { -webkit-transform:rotateZ(90deg); transform:rotateZ(90deg); } .circle1 { top:0; left:0; } .circle2 { top:0; right:0; } .circle3 { right:0; bottom:0; } .circle4 { left:0; bottom:0; } .container2 .circle1 { -webkit-animation-delay:-1.1s; animation-delay:-1.1s; } .container3 .circle1 { -webkit-animation-delay:-1.0s; animation-delay:-1.0s; } .container1 .circle2 { -webkit-animation-delay:-0.9s; animation-delay:-0.9s; } .container2 .circle2 { -webkit-animation-delay:-0.8s; animation-delay:-0.8s; } .container3 .circle2 { -webkit-animation-delay:-0.7s; animation-delay:-0.7s; } .container1 .circle3 { -webkit-animation-delay:-0.6s; animation-delay:-0.6s; } .container2 .circle3 { -webkit-animation-delay:-0.5s; animation-delay:-0.5s; } .container3 .circle3 { -webkit-animation-delay:-0.4s; animation-delay:-0.4s; } .container1 .circle4 { -webkit-animation-delay:-0.3s; animation-delay:-0.3s; } .container2 .circle4 { -webkit-animation-delay:-0.2s; animation-delay:-0.2s; } .container3 .circle4 { -webkit-animation-delay:-0.1s; animation-delay:-0.1s; } @-webkit-keyframes bouncedelay { 0%,80%,100% { -webkit-transform:scale(0.0) } 40% { -webkit-transform:scale(1.0) } } @keyframes bouncedelay { 0%,80%,100% { transform:scale(0.0); -webkit-transform:scale(0.0); } 40% { transform:scale(1.0); -webkit-transform:scale(1.0); } }</style><body> <p id="loading" > <p class="spinner"> <p class="spinner-container container1"> <p class="circle1"></p> <p class="circle2"></p> <p class="circle3"></p> <p class="circle4"></p> </p> <p class="spinner-container container2"> <p class="circle1"></p> <p class="circle2"></p> <p class="circle3"></p> <p class="circle4"></p> </p> <p class="spinner-container container3"> <p class="circle1"></p> <p class="circle2"></p> <p class="circle3"></p> <p class="circle4"></p> </p> </p> </p></body>
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