skong
/
html_css_demo
mirror of https://gitee.com/wyanhui02/html_css_demo.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

更新第79个小实例：纯CSS实现DNA双螺旋动画

This commit is contained in:
DESKTOP-BM6RJU5\wyanh 2021-12-24 21:12:22 +08:00
parent 0e69e117b9
commit f322b3278a
3 changed files with 103 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
README.md
View File

@ -82,4 +82,5 @@
75. HTML5+CSS3小实例之简约又高级的变色loading动画
76. HTML5+CSS3小实例之旋转的圣诞树
77. HTML5+CSS3小实例之滚动的方块loading动画
78. HTML5+CSS3小实例之按钮悬浮效果
78. HTML5+CSS3小实例之按钮悬浮效果
79. HTML5+CSS3小实例：纯CSS实现DNA双螺旋动画

71
css/79.css Normal file
View File

@ -0,0 +1,71 @@
*{
/* 初始化 */
margin: 0;
padding: 0;
}
body{
/* 100%窗口高度 */
height: 100vh;
/* 弹性布局 水平+垂直居中 */
display: flex;
justify-content: center;
align-items: center;
background-color: #000;
}
.container{
width: 200px;
height: 700px;
/* 开启3D效果 */
transform-style: preserve-3d;
/* 定义3D元素距视图的距离 */
perspective: 1000px;
/* 沿Z轴旋转15度 */
transform: rotateZ(15deg);
}
.container .line{
width: 200px;
height: 30px;
/* 绝对定位 */
position: absolute;
/* 结合自定义属性--d，计算top */
top: calc(50px * var(--d));
/* 执行动画：动画名 时长 线性 无限播放 */
animation: roll 4s linear infinite;
/* 结合自定义属性--d，计算动画延迟时间 */
animation-delay: calc(0.3s * var(--d));
}
/* 两边两个圆的统一样式 */
.container .line::before,.container .line::after{
content: "";
width: 30px;
height: 30px;
border-radius: 50%;
}
/* 左圆 */
.container .line::before{
background-color: #e60116;
position: absolute;
left: 0;
}
/* 右圆 */
.container .line::after{
background-color: #0588da;
position: absolute;
right: 0;
}
/* 中间的线 */
.container .line span{
width: 140px;
height: 2px;
background-color: #fff;
position: absolute;
left: 30px;
top: 15px;
}
/* 定义旋转动画 */
@keyframes roll {
100%{
transform: rotateY(360deg);
}
}

30
html/79.html Normal file
View File

@ -0,0 +1,30 @@
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
<title>纯CSS实现DNA双螺旋动画</title>
<link rel="stylesheet" href="../css/79.css">
</head>
<body>
<div class="container">
<!-- --d为自定义属性，CSS中可通过var函数对其调用 -->
<div class="line" style="--d:1;"><span></span></div>
<div class="line" style="--d:2;"><span></span></div>
<div class="line" style="--d:3;"><span></span></div>
<div class="line" style="--d:4;"><span></span></div>
<div class="line" style="--d:5;"><span></span></div>
<div class="line" style="--d:6;"><span></span></div>
<div class="line" style="--d:7;"><span></span></div>
<div class="line" style="--d:8;"><span></span></div>
<div class="line" style="--d:9;"><span></span></div>
<div class="line" style="--d:10;"><span></span></div>
<div class="line" style="--d:11;"><span></span></div>
<div class="line" style="--d:12;"><span></span></div>
</div>
</body>
</html>