渡一教育公开课web前端开发JavaScript精英课学习笔记（二十一）CSS3实现Loading

本文链接：https://blog.youkuaiyun.com/jingliuting/article/details/88046432
CSS3实现Loading

<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    html,
    body {
      background: #333333;
    }

    .demo {
      position: absolute;
      top: 50px;
      left: 50px;
      width: 200px;
      height: 200px;
      border: 1px solid #ffffff;
      margin: 150 auto;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .demo .shape {
      position: relative;
      width: 10px;
      height: 10px;
      display: inline-block;
      border: 1px solid #ffffff;
      margin: 0 5px;
      opacity: 0.5;
    }

    .demo .shape1 {
      background-color: blue;
      animation: animation1 1s ease infinite 0.0s;
    }

    .demo .shape2 {
      background-color: red;
      animation: animation1 1s ease infinite 0.25s;
    }

    .demo .shape3 {
      background-color: green;
      animation: animation1 1s ease infinite 0.5s;
    }

    .demo .shape4 {
      background-color: yellow;
      animation: animation1 1s ease infinite 0.75s;
    }

    /* 设置关键帧动画 0% ~ 100%*/
    @keyframes animation1 {
      0% {
        transform: scale(1);
        opcaity: 0.5;
      }

      50% {
        transform: scale(1.5);
        opcaity: 1;
      }

      100% {
        transform: scale(1);
        opcaity: 0.5;
      }
    }

    .demo2 {
      position: absolute;
      top: 50px;
      left: 300px;
      width: 200px;
      height: 200px;
      border: 1px solid #ffffff;
      margin: 150 auto;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .demo2 .con {
      position:absolute;
      width: 40px;
      height: 40px;
      /* border: 1px solid #ffffff; */
    }

    .demo2 .ball {
      position:absolute;
      top:40%;
      display: inline-block;
      width: 10px;
      height: 10px;
      background-color: #ffffff;
      border-radius: 50%;
    }
    .demo2 .ball1{
      left:0px;
      animation: animation2 1s ease infinite 0s;
      background-color:blue;
    }
    .demo2 .ball2{
      left:10px;
      background-color:red;
    }
    .demo2 .ball3{
      left:20px;
      background-color:green;
    }
    .demo2 .ball4{
      left:30px;
      animation: animation3 1s ease infinite 0.5s;
      background-color:yellow;
    }

    @keyframes animation2{
      0%{
        left:0px;
        top:40%;
      }
      25%{
        left:-20px;
        top:00%;
      }
      50%{
        left:0px;
        top:40%;
      }
      75%{
        left:0px;
        top:40%;
      }
      100%{
        left:0px;
        top:40%;
      }
    }

    @keyframes animation3{
      0%{
        left:30px;
        top:40%;
      }
      25%{
        left:50px;
        top:0%;
      }
      50%{
        left:30px;
        top:40%;
      }
      75%{
        left:30px;
        top:40%;
      }
      100%{
        left:30px;
        top:40%;
      }
    }
.demo3{
    position:absolute;
    border:1px solid white;
    width:200px;
    height:200px;
    top:50px;
    left:550px;

    display:flex;
    justify-content:center;
    align-items:center;
}
.demo3 .box{
    position:absolute;
    width:30px;
    height:30px;
    left:30px;
    animation:moveBox 6s 0s linear infinite;
}
.demo3 .face{
    position:absolute;
    width:30px;
    height:30px;
    border-radius:50%;
    background-color:orange;
}
.demo3 .face-top{
    /* 上边剪切，左侧保留（宽度-右侧剪切），上面保留（高度-下面剪切），左侧剪切 */
    clip:rect(0,30px,15px,0);
    transform:rotateZ(-30deg);
    /* 关键帧名 动画时长 延时 动画类型 循环方式 过渡处理*/
    animation:moveFaceTop 0.5s 0s linear infinite alternate;
}
.demo3 .face-bottom{
    clip:rect(15px,30px,30px,0);
    transform:rotateZ(30deg);
    animation:moveFaceBottom 0.5s 0s linear infinite alternate;

}
.demo3 .eye{
    position:absolute;
    top:5px;
    left:10px;
    width:5px;
    height:5px;
    border-radius:50%;
    background-color:black;
    z-index:99;
}
.demo3 .beans{
    list-style:none;
}
.demo3 .bean{
    width:10px;
    height:10px;
    background-color:red;
    border-radius:50%;
    margin:0 5px;
    display:inline-block;
}
.demo3 .bean01{
    animation:moveBean 2s 0s linear infinite alternate;
}
.demo3 .bean02{
    animation:moveBean 2s 1s linear infinite alternate;
}
.demo3 .bean03{
    animation:moveBean 2s 2s linear infinite alternate;
}
@keyframes moveBean{
    0%{
        opacity:1;
    }
    50%{
        opacity:0;
    }
    100%{
        opacity:1;
    }
}
@keyframes moveBox{
    0%{
        left:30px;
        transform:rotateY(0deg);
    }
    45%{
        left:150px;
        transform:rotateY(0deg);
    }
    50%{
        left:150px;
        transform:rotateY(180deg);
    }
    95%{
        left:30px;
        transform:rotateY(180deg);
    }
    100%{
        left:30px;
        transform:rotateY(0deg);
    }
}
@keyframes moveFaceTop{
    0%{
        transform:rotateZ(-30deg);
    }
    50%{
        transform:rotateZ(0deg);
    }
    100%{
        transform:rotateZ(-30deg);
    }
}
@keyFrames moveFaceBottom{
    0%{
        transform:rotateZ(30deg);
    }
    50%{
        transform:rotateZ(0deg);
    }
    100%{
        transform:rotateZ(30deg);
    }
}
  </style>
</head>

<body>
  <div class="demo">
    <div class="shape shape1"></div>
    <div class="shape shape2"></div>
    <div class="shape shape3"></div>
    <div class="shape shape4"></div>
  </div>

  <div class="demo2">
    <div class="con">
      <div class="ball ball1"></div>
      <div class="ball ball2"></div>
      <div class="ball ball3"></div>
      <div class="ball ball4"></div>
    </div>
  </div>

  <div class="demo3">
        <div class="box">
            <!-- <img src="./img/cap.jpg" alt=""> -->
            <div class="eye"></div>
            <div class='face face-top'></div>
            <div class='face face-bottom'></div>
        </div>
        <ul class='beans'>
            <li class='bean bean01'></li>
            <li class='bean bean02'></li>
            <li class='bean bean03'></li>
        </ul>
    </div>
</body>
</html>