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!
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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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