How to animate a rotating bicycle wheel using pure CSS
The content of this article is about how to use pure CSS to realize the animation effect of a rotating bicycle wheel. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you. help.
Effect preview
Source code download
https://github.com/comehope/front-end-daily -challenges
Code Interpretation
Define dom, the container contains 6 elements:
<div> <span></span> <span></span> <span></span> <span></span> <span></span> <span></span> </div>
Centered display:
body {
margin: 0;
height: 100vh;
display: flex;
align-items: center;
justify-content: center;
background-image: linear-gradient(#555, #222);
}Draw the wheel circle:
.wheel {
width: 9em;
height: 9em;
font-size: 25px;
border: 0.4em solid #777;
border-radius: 50%;
box-shadow: 0 0 0 0.5em #111;
}Define the style of the spokes:
.wheel {
display: flex;
align-items: center;
justify-content: center;
}
.wheel span {
position: absolute;
width: 8em;
height: 1em;
border: 0.1em solid;
border-color: #ccc transparent;
}Define variables and draw multiple spokes:
.wheel span {
transform: rotate(calc((var(--n) - 1) * 30deg));
}
.wheel span:nth-child(1) {
--n: 1;
}
.wheel span:nth-child(2) {
--n: 2;
}
.wheel span:nth-child(3) {
--n: 3;
}
.wheel span:nth-child(4) {
--n: 4;
}
.wheel span:nth-child(5) {
--n: 5;
}
.wheel span:nth-child(6) {
--n: 6;
}Let the wheel rotate:
.wheel span {
animation: run 4s linear infinite;
}
@keyframes run {
to {
transform: rotate(calc((var(--n) - 1) * 30deg + 360deg));
}
}Draw with pseudo elements Draw the lines on the ground:
.wheel {
position: relative;
}
.wheel::before {
content: '';
position: absolute;
width: 15em;
height: 0.2em;
top: 11em;
background-image: linear-gradient(
to right,
silver 0, silver 4em,
transparent 4em, transparent 5em,
silver 5em, silver 10em,
transparent 10em, transparent 12em,
silver 12em, silver 14em,
transparent 14em, transparent 15em
);
}Finally, let the lines on the ground move to form the effect of wheels moving forward:
.wheel::before {
background-position: 15em;
animation: run2 6s linear infinite;
}
@keyframes run2 {
to {
background-position: -15em;
}
}Done!
Related recommendations:
How to Use pure CSS to implement a paper crane (with source code)
How to use CSS and D3 to implement interactive animation of small fish swimming (with code)The above is the detailed content of How to animate a rotating bicycle wheel using pure CSS. For more information, please follow other related articles on the PHP Chinese website!
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