How to use pure CSS to animate the sun and the Earth and the moon's motion model

This article brings you to the content is about how to use pure CSS to achieve the sun and the Earth and the moon's running model animation, there is a certain reference value, the need for friends can refer to, I hope to help you.

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Source code Download

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

Code interpretation

To define the DOM, the container contains 3 elements:

<div class= "Container" >    <div class= "Sun" ></div>    <div class= "Earth" >        <div Class= "Moon" ></div>    </div></div>

Center display:

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

Define Container Dimensions:

. container {    font-size:10px;    Width:40em;    Height:40em;    Position:relative;}

Draw the Sun:

. Sun {    position:absolute;    top:15em;    left:15em;    Width:10em;    Height:10em;    Background-color:yellow;    border-radius:50%;    box-shadow:0 0 3em White;}

Draw the path of the Earth and the moon:

. Earth,.moon  {    position:absolute;    Border-style:solid;    Border-color:white transparent transparent transparent;    Border-width:0.1em 0.1em 0 0;    border-radius:50%;}. Earth {    top:5em;    left:5em;    Width:30em;    Height:30em;}. Moon {    top:0;    right:0;    Width:8em;    Height:8em;}

Plot the Earth and the moon with pseudo-elements:

. earth::before,.moon::before {    position:absolute;    border-radius:50%;   Content: ';}. Earth::before {    top:2.8em;    right:2.5em;    Height:3em;    Width:3em;    Background-color:aqua;}. Moon::before {    top:0.8em;    Right:0.2em;     Width:1.2em;    Height:1.2em;    Background-color:silver;}

To set the animation effect of running:

/* Rotation period 365.2422 days */.earth {    animation:orbit 36.5s linear infinite;   } /* Rotation period 27.322 days */.moon {    animation:orbit 2.7s linear Infinite;} @keyframes Orbit {to    {        transform:rotate (360deg);    }}

Finally, hide the parts that might appear outside the container:

body {    Overflow:hidden;}

Done!