How to use CSS to realize the dynamic effect of color rotation animation

Source: Internet
Author: User
This article introduces to you about how to use CSS to realize the dynamic effect of color rotation animation, there is a certain reference value, there is a need for friends to refer to, I hope you have some help.

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Code interpretation

To define the DOM, the container contains 9 elements:

<div class= "Container" >    <span></span>    <span></span>    <span></ span>    <span></span>    <span></span>    <span></span>    < span></span>    <span></span>    <span></span></div>

Center display:

body {    margin:0;    HEIGHT:100VH;    Display:flex;    Align-items:center;    Justify-content:center;    Background-color:black;}

Define Container Dimensions:

. container {    width:30em;    Height:30em;    font-size:12px;}

To set the style of a line in a container:

. container {    color:lime;}. Container span {    position:absolute;    width:5em;    height:5em;    Border-style:solid;    Border-width:1em 1em 0 0;    Border-color:currentcolor Transparent;    border-radius:50%;}

To center a line in a container:

. container {    Display:flex;    Align-items:center;    Justify-content:center;}

Define variables to gradually extend the lines from the center outward:

. container span {    --diameter:calc (5em + (VAR (--n)-1) * 3em);    Width:var (--diameter);    Height:var (--diameter);}. Container Span:nth-child (1) {    --n:1;}. Container Span:nth-child (2) {    --n:2;}. Container Span:nth-child (3) {    --n:3;}. Container Span:nth-child (4) {    --n:4;}. Container Span:nth-child (5) {    --n:5;}. Container Span:nth-child (6) {    --n:6;}. Container Span:nth-child (7) {    --n:7;}. Container Span:nth-child (8) {    --n:8;}. Container Span:nth-child (9) {    --n:9;}

Set the animation effect to rotate the line:

. container span {    animation:rotating linear infinite;    Animation-duration:calc (5s/(9-var (--n) + 1));} @keyframes Rotating {To    {        transform:rotate (1turn);    }}

Defines the animation effect that changes color, with the Hue ring 360 degrees a week to the 100%,--percent variable is where this 100% is located:

@keyframes Change-color {    0, 100% {        --percent:0;    }    10% {        --percent:10;    }    20% {        --percent:20;    }    30% {        --percent:30;    }    40% {        --percent:40;    }    50% {        --percent:50;    }    60% {        --percent:60;    }    70% {        --percent:70;    }    80% {        --percent:80;    }    90% {        --percent:90;    }}

Finally, apply the animated effect of color change to the container:

. container {    --deg:calc (VAR (--percent)/360deg);    COLOR:HSL (Var (--deg), 100%, 50%);    Animation:change-color 5s linear Infinite;}

Done!

Related articles recommended:

How to realize the dynamic effect of spaceship with CSS and D3

How to use CSS and D3 to achieve the effects of endless hexagon space

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