「HTML+CSS」自定义加载动画【034】
Part1效果展示
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Part2Demo代码
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<title>Document</title>
</head>
<body>
<section><span></span></section>
</body>
</html>
CSS
html, body {
margin: 0;
height: 100%;
}
body {
display: flex;
justify-content: center;
align-items: center;
background: #263238;
}
section {
width: 650px;
height: 300px;
padding: 10px;
position: relative;
display: flex;
align-items: center;
justify-content: center;
border: 2px solid red;
}
span {
width: 96px;
height: 96px;
border: 4px solid white;
border-radius: 50%;
position: relative;
display: flex;
justify-content: center;
align-items: center;
animation: rotation 2s linear infinite;
}
span::after {
content: '';
border: 42px solid;
border-color: red transparent red transparent;
border-radius: 50%;
}
@keyframes rotation {
0% {
transform: rotate(0deg)
}
100% {
transform: rotate(360deg)
}
}
Part3原理详解
步骤1
使用span标签,设置
宽度、高度均为96px 边框:4px 白色 solid
效果图如下
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步骤2
将span标签设置为flex布局
display:flex 元素上下居中 元素左右居中
display: flex;
justify-content: center;
align-items: center;
步骤3
使用span::after伪类元素,设置为
边框:42px solid 上/下边框颜色:红色 上/下边框颜色:透明
border: 42px solid ;
border-color: red transparent red transparent;
效果图如下
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注:此时span::after是位于span正中间的
步骤4
span、span::after圆角化
border-radius: 50%;
效果图如下
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步骤5
为span添加动画
顺时针旋转(0-360度) 2s 无限循环
animation: rotation 2s linear infinite;
@keyframes rotation {
0% {
transform: rotate(0deg)
}
100% {
transform: rotate(360deg)
}
}
效果图如下
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Part4结语
希望对您有所帮助
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