How to use pure css to implement the loader animation effect of a racing car (code attached)-CSS Tutorial-php.cn

Effect preview

How to use pure css to implement the loader animation effect of a racing car (code attached)

Source code download

https://github. com/comehope/front-end-daily-challenges

Code interpretation

Define dom, the container contains 1.carelement, and its 2 sub-elements represent Body and wheels:

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Centered display:

body { margin: 0; height: 100vh; display: flex; align-items: center; justify-content: center; background-color: #333; }

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Define container size and car color:

.loader { width: 11.7em; height: 4.2em; color: lightcyan; position: relative; }

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Draw chassis:

.car { position: absolute; width: inherit; height: 2em; background-color: currentColor; top: 1.5em; border-radius: 0 5em 1em 0 / 0 4em 1em 0; }

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Draw tail Ji:

.car::before { content: ''; position: absolute; width: 0; height: 0; border: 0.6em solid transparent; border-left-width: 0; border-right-color: currentColor; transform-origin: left; transform: rotate(-45deg); top: -0.5em; }

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(It looks a bit like an airplane at this time, haha~~)

Draw the car body:

.body { position: absolute; width: 7.5em; height: 3.5em; box-sizing: border-box; border: 0.4em solid; border-radius: 3em 4.5em 0 0 / 3em 4em 0 0; top: -1.5em; left: 1.2em; }

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Use pseudo elements to draw the windows:

.body::before { content: ''; position: absolute; width: 3.5em; height: inherit; background-color: currentColor; border-top-left-radius: inherit; left: -0.4em; top: -0.4em; }

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Draw the outline of the wheel:

.wheels::before, .wheels::after { content: ''; position: absolute; box-sizing: border-box; width: 2.6em; height: 2.6em; background-color: #333; border-radius: 50%; bottom: -1em; }

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Draw the wheel hub:

.wheels::before, .wheels::after { border: 0.3em solid #333; background-image: linear-gradient( 135deg, transparent 45%, currentColor 46%, currentColor 54%, transparent 55% ), linear-gradient( 90deg, transparent 45%, currentColor 46%, currentColor 54%, transparent 55% ), linear-gradient( 45deg, transparent 45%, currentColor 46%, currentColor 54%, transparent 55% ), linear-gradient( 0deg, transparent 45%, currentColor 46%, currentColor 54%, transparent 55% ), radial-gradient( currentColor 29%, transparent 30%, transparent 50%, currentColor 51% ); }

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Position the wheels to the left and right sides:

.wheels::before { left: 1.2em; } .wheels::after { right: 0.8em; }

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Next, create the animation effect.

Add the dom element that represents the wind shadow.strikes, which contains 5 sub-elements:

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Draw 5 short thin lines:

.strikes { position: absolute; width: 1em; height: inherit; border: 1px dashed white; display: flex; flex-direction: column; justify-content: space-between; } .strikes span { height: 0.1em; background-color: lightcyan; }

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Add the animation effect of the passing wind shadow, define css variables, and set the animation delay:

.strikes span { animation: drift 0.2s linear infinite; animation-delay: calc((var(--n) - 1) * 0.05s); } @keyframes drift { from { transform: translate(3.5em); } to { transform: translate(-8em); filter: opacity(0); } } .strikes span:nth-child(1) { --n: 1; } .strikes span:nth-child(2) { --n: 2; } .strikes span:nth-child(3) { --n: 3; } .strikes span:nth-child(4) { --n: 4; } .strikes span:nth-child(5) { --n: 5; }

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Add the animation effect of wheel rotation:

.wheels::before, .wheels::after { animation: rotating 0.5s linear infinite; } @keyframes rotating { to { transform: rotate(1turn); } }

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Add the animation effect of body bumps:

.car { animation: run 0.25s linear infinite; } @keyframes run { 0% { transform: translate(0.2em, 0.1em) rotate(0deg); } 20% { transform: translate(0.1em, 0.2em) rotate(1deg); } 40% { transform: translate(0.1em, -0.1em) rotate(-1deg); } 60% { transform: translate(-0.1em, 0.2em) rotate(0deg); } 80% { transform: translate(-0.1em, 0.1em) rotate(1deg); } 100% { transform: translate(0.2em, 0.1em) rotate(-1deg); } }

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Done!

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