How to use pure CSS to achieve the effect of a color card-CSS Tutorial-php.cn

This article mainly introduces how to use pure CSS to achieve the effect of a color card. It has certain reference value. Now I share it with you. Friends in need can refer to it

How to use pure CSS to achieve the effect of a color card

Source code download

Please download all the source code of the daily front-end practical series from github:

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

Code Interpretation

Define dom, the container contains 8 elements:

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Centered display:

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

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Redefine the box model:

.cards, .cards > * { box-sizing: border-box; }

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Define the container size:

.cards { width: 20em; height: 20em; }

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Draw the color card:

.cards span { position: absolute; width: 10em; height: 3em; background-color: lightgreen; top: calc(50% - 3em / 2); border: 0.2em solid dimgray; border-radius: 0.3em 0.8em 0.8em 0.3em; }

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Draw the label of the color card with pseudo elements:

.cards span::before { content: ''; position: absolute; width: 35%; height: 100%; background-color: white; right: 0; border-radius: 0 0.6em 0.6em 0; border-left: 0.2em solid silver; }

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Draw with pseudo elements Text on the color card label:

.cards span::after { content: ''; position: absolute; width: 0.4em; height: 2em; background-color: silver; left: 6.5em; top: 0.1em; box-shadow: 0.7em 0 0 -0.1em silver; }

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Set variables for the color card:

.cards span:nth-child(1) { --n: 1; } .cards span:nth-child(2) { --n: 2; } .cards span:nth-child(3) { --n: 3; } .cards span:nth-child(4) { --n: 4; } .cards span:nth-child(5) { --n: 5; } .cards span:nth-child(6) { --n: 6; } .cards span:nth-child(7) { --n: 7; } .cards span:nth-child(8) { --n: 8; }

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Color the color card with HSL color mode:

.cards span { background-color: hsl(calc(360 / 8 * var(--n)), 80%, 70%); }

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Define animation effects:

.cards span { transform-origin: right; animation: rotating 3s linear infinite; } @keyframes rotating { 0%, 35% { transform: rotate(0deg); } 90%, 100% { transform: rotate(360deg); } }

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Finally, set the animation delay to let the cards rotate in sequence:

.cards span { animation-delay: calc((var(--n) - 8) * 0.15s); }

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You’re done!

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