How to use CSS to achieve Chinese knot effect (code)

Source: Internet
Author: User
This article brings you the content is about how to use CSS to achieve Chinese knot effect (code), there is a certain reference value, the need for friends can refer to, I hope to help you.

Today, I would like to share with you a tutorial on using CSS to draw Chinese knots.
The final effect is as follows:

First of all, we define the structure needed to draw the Chinese knot:

<div class= "knot" >    <span class= "box" ></span>    <span class= "box" ></span>    <span class= "box" ></span>    <span class= "box" ></span></div>

Then start writing the style and let the Chinese Knot center the display:

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

Set the container style for Chinese knots:

. knot {  box-sizing:border-box;  font-size:100px;  Width:2em;  Height:1.6em;  Background:skyblue;  Display:flex;  Align-items:center;  Justify-content:center;}

I split the base style of the Chinese knot into 4 rectangles, first defining the basic style of the rectangle:

. box {  position:absolute;  Box-sizing:border-box;  Width:1em;  Height:0.4em;  Border:var (--b) solid firebrick;  --b:0.1em;}

Then we'll adjust the style of each rectangle and combine them into the base of the knot:

. Knot. Box:nth-child (1) {  transform:rotate (45deg) Translate ( -15%, -38%);  border-radius:20% 0% 0% 20%/50% 0 0 50%;}. Knot. Box:nth-child (2) {  transform:rotate (45deg) Translate (15%, 37%);  border-radius:0% 20% 20% 0%/0% 50% 50% 0%;}. Knot. Box:nth-child (3) {  transform:rotate ( -45deg) Translate (15%, -38%);  border-radius:0% 20% 20% 0%/0% 50% 50% 0%;}. Knot. Box:nth-child (4) {  transform:rotate ( -45deg) Translate ( -15%, 37%);  border-radius:20% 0% 0% 20%/50% 0 0 50%;}

Finally, we use the pseudo-elements of the first and second rectangles to draw the remaining two small circles:

.knot. Box:nth-child (1):: after {box-sizing:border-box;  Content: ";  Position:absolute;  Width:0.4em;  Height:0.4em;  Border:var (--b) solid firebrick;  border-radius:50% 50% 50% 0%;  Top: -0.4em; Right: -0.4em;}.  Knot. Box:nth-child (2):: after {box-sizing:border-box;  Content: ";  Position:absolute;  Width:0.4em;  Height:0.4em;  Border:var (--b) solid firebrick;  border-radius:50% 0% 50% 50%;  Top:0.2em; Right:0.8em;} 

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