动态加载动画 Kinetic Loader
1. 概述
项目本体展示了一个动态加载动画.
涉及知识点: 使用 CSS 绘制三角形.
效果:
2. 结构和切图
网页的基本结构如下:
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<body>
<div class="kinetic"></div>
</body>
3. 编写 CSS 样式
首先将 body 的样式设为 水平垂直居中:
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body {
background-color: #1f1e33;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
overflow: hidden;
}
其次对 kinetic 容器样式进行设置绘制出三角形, 原理见 此处
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.kinetic {
position: relative;
height: 80px;
width: 80px;
}
.kinetic::after,
.kinetic::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
border: 50px solid transparent;
border-bottom-color: #fff;
}
.kinetic::before {
transform: rotate(90deg);
animation: rotateB 2s linear infinite;
}
然后设计伪元素对应的两个三角形的动画关键帧:
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@keyframes rotateA {
0%,
25% {
transform: rotate(0deg);
}
50%,
75% {
transform: rotate(180deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotateB {
0%,
25% {
transform: rotate(90deg);
}
50%,
75% {
transform: rotate(270deg);
}
100% {
transform: rotate(450deg);
}
}
完整的 CSS 样式表如下:
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* {
box-sizing: border-box;
}
body {
background-color: #1f1e33;
display: flex;
align-items: center;
justify-content: center;
height: 100vh;
margin: 0;
overflow: hidden;
}
.kinetic {
position: relative;
height: 80px;
width: 80px;
}
.kinetic::after,
.kinetic::before {
content: '';
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
border: 50px solid transparent;
border-bottom-color: #fff;
}
.kinetic::before {
transform: rotate(90deg);
animation: rotateB 2s linear infinite;
}
@keyframes rotateA {
0%,
25% {
transform: rotate(0deg);
}
50%,
75% {
transform: rotate(180deg);
}
100% {
transform: rotate(360deg);
}
}
@keyframes rotateB {
0%,
25% {
transform: rotate(90deg);
}
50%,
75% {
transform: rotate(270deg);
}
100% {
transform: rotate(450deg);
}
}
最后, 完整的网页演示可见 此处
