源代码下载
https://github.com/comehope/front-end-daily-challenges
代码解读
定义dom,容器中包含6个元素:
<divclass="wheel">
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
居中显示:
body{
margin:0;
height:100vh;
display:flex;
align-items:center;
justify-content:center;
background-image:linear-gradient(#555,#222);
}
画出轮圈:
.wheel{
width:9em;
height:9em;
font-size:25px;
border:0.4emsolid#777;
border-radius:50%;
box-shadow:0000.5em#111;
}
定义辐条的样式:
.wheel{
display:flex;
align-items:center;
justify-content:center;
}
.wheelspan{
position:absolute;
width:8em;
height:1em;
border:0.1emsolid;
border-color:#ccctransparent;
}
定义变量,画出多根幅条:
.wheelspan{
transform:rotate(calc((var(--n)-1)*30deg));
}
.wheelspan:nth-child(1){
--n:1;
}
.wheelspan:nth-child(2){
--n:2;
}
.wheelspan:nth-child(3){
--n:3;
}
.wheelspan:nth-child(4){
--n:4;
}
.wheelspan:nth-child(5){
--n:5;
}
.wheelspan:nth-child(6){
--n:6;
}
让车轮转动起来:
.wheelspan{
animation:run4slinearinfinite;
}
@keyframesrun{
to{
transform:rotate(calc((var(--n)-1)*30deg+360deg));
}
}
用伪元素画出地面上的线条:
.wheel{
position:relative;
}
.wheel::before{
content:'';
position:absolute;
width:15em;
height:0.2em;
top:11em;
background-image:linear-gradient(
toright,
silver0,silver4em,
transparent4em,transparent5em,
silver5em,silver10em,
transparent10em,transparent12em,
silver12em,silver14em,
transparent14em,transparent15em
);
}
最后,让地面上的线条动起来,形成车轮向前走的效果:
.wheel::before{
background-position:15em;
animation:run26slinearinfinite;
}
@keyframesrun2{
to{
background-position:-15em;
}
}


本文转载自中文网


本文转载自中文网
如需转载,请注明文章出处和来源网址:http://www.divcss5.com/css3-style/c55455.shtml