Draw a circle using pure CSS (code example)

This article introduces how to draw a circle using pure CSS through code examples. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

The idea of ​​drawing a circle is very simple: first draw two circles and set different background colors; then make the centers of the two circles coincide.

Difficulty factor

##☆☆

HTML

<div class="container">
    <span class="ring-style"></span>
</div>

Analysis:

There is a parent container here

CSS

.container {
    position: relative;
    top: 0;
    left: 0;
    width: 300px;
    height: 300px;
    background-color: lightgrey;
}
.ring-style {
    display: inline-block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: blue;
    width: 260px;
    height: 260px;
    border-radius: 260px;
}
.ring-style::before {
    content: ' ';
    display: inline-block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    width: 200px;
    height: 200px;
    border-radius: 200px;
}

Analysis:

Set the width, height and rounded corners of the element The effect is to draw a circle
• Create two circles through the ::before pseudo-element and the body element
• By setting the top, left, and translate attributes based on the absolute positioning of the parent container, Center the element horizontally and vertically based on the parent container, so that the centers of the two circles coincide

[Recommended tutorial:

CSS video tutorial]

Rendering

##Knowledge points

border-radius

• :: before && ::after
• Elements are centered horizontally and vertically
• For more programming-related knowledge, please visit:

Programming Video

! !

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