CSS3实现动画加载效果

<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8" /><meta name="viewport" content="width=device-width, initial-scale=1.0" /><title>加载效果</title><link rel="stylesheet" href="./style.css" /></head><body><!-- 弹跳加载动画 --><div class="bouncing-loader"><div class="bouncing-loader-item"></div><div class="bouncing-loader-item"></div><div class="bouncing-loader-item"></div></div><!-- 旋转加载动画 --><div class="spin-loading"><div class="loading"></div></div><!-- 点点点加载动画 --><span class="dot">正在加载中<span class="dotted"></span></span></body>
</html>

/* style.css */
* {margin: 0;padding: 0;box-sizing: border-box;
}html,
body {display: flex;
}
/* 弹跳加载效果 */
.bouncing-loader,
.spin-loading,
.dot {display: flex;justify-content: center;align-items: center;width: 150px;border: 1px solid #efefef;margin: 3rem;
}
.bouncing-loader-item {width: 16px;height: 16px;margin: 3rem 0.2rem;background-color: #0b16f1;border-radius: 50%;animation: bouncingLoader 0.6s infinite alternate;
}
.bouncing-loader-item:nth-child(2) {animation-delay: 0.2s;
}
.bouncing-loader-item:nth-child(3) {animation-delay: 0.4s;
}
@keyframes bouncingLoader {to {opacity: 0.1;transform: translate3d(0, -10px, 0);}
}/* 旋转动画效果 */
.spin-loading .loading {width: 100%;aspect-ratio: 1;border-radius: 100%;/* 锥形渐变 */background-image: conic-gradient(#0b16f1, 30%, #fff);/* 使用蒙版将中间变为透明 */-webkit-mask-image: radial-gradient(closest-side, transparent 80%, black 80%);/* 开启动画 */animation: spin 1s linear infinite reverse;
}@keyframes spin {from {transform: rotate(0deg);}to {transform: rotate(360deg);}
}
/* ...动画效果 */
.dotted {display: inline-block;width: 20px;
}
.dotted::after {content: '';animation: dotted 2s infinite;
}
@keyframes dotted {0% {content: '...';}25% {content: '';}50% {content: '.';}75% {content: '..';}100% {content: '...';}
}