How to use pure CSS to implement the album icon of the Apple system (code)-CSS Tutorial-php.cn

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How to use pure CSS to implement the album icon of the Apple system (code)

Source code download

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

Code Interpretation

Define dom, the container contains 8 elements, each element represents a rectangular color block:

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Centered display:

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

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Define the size of the container:

.icon { width: 10em; height: 10em; font-size: 30px; background-color: #eee; border-radius: 20%; }

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Draw the outline of the rectangle (the border is an auxiliary line, which will eventually be deleted), and place it in the middle and upper part of the container:

.icon { position: relative; display: flex; justify-content: center; box-sizing: border-box; padding: 1em; } .icon span { position: absolute; width: 22.5%; height: 37.5%; border: 1px dashed black; border-radius: 50% / 30%; }

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Set the subscript for the rectangle Variable--n:

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

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Let the 8 rectangles rotate at fixed angles in sequence and form a circle:

.icon span { transform-origin: center 105%; transform: rotate(calc((var(--n) - 1) * 45deg)); }

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Set the color variable for the rectangle- -c：

.icon span:nth-child(1) { --c: rgba(243, 156, 18, 0.7); } .icon span:nth-child(2) { --c: rgba(241, 196, 15, 0.7); } .icon span:nth-child(3) { --c: rgba(46, 204, 113, 0.7); } .icon span:nth-child(4) { --c: rgba(27, 188, 155, 0.7); } .icon span:nth-child(5) { --c: rgba(65, 131, 215, 0.7); } .icon span:nth-child(6) { --c: rgba(102, 51, 153, 0.7); } .icon span:nth-child(7) { --c: rgba(155, 89, 182, 0.7); } .icon span:nth-child(8) { --c: rgba(242, 38, 19, 0.7); }

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Color 8 rectangles and delete the borders that serve as auxiliary lines:

.icon span { /* border: 1px dashed black; */ background-color: var(--c); }

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Set the color mixing mode so that overlapping colors can be superimposed:

.icon span { mix-blend-mode: multiply; }

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Add the mouse hover effect and run the animation of the rectangular color block expansion when hovering:

.icon:hover span { animation: rotating 2s ease-in-out forwards; } @keyframes rotating { from { transform: rotate(0deg); } to { transform: rotate(calc((var(--n) - 1) * 45deg)); } }

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Note that the first rectangle does not rotate during the animation because it starts from 0 degrees Go to 0 degrees. In order to make it rotate, you need to set its end angle to 360 degrees. This is achieved by modifying its subscript variable:

.icon span:nth-child(1) { --n: 9; }

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You're done!

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