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How to use css radial gradient

藏色散人

Dec 22, 2020 am 09:58 AM

css

How to use css radial gradient: first create an HTML sample file; then create a div block; finally add the css style as "background:radial-gradient()" to achieve the radial gradient effect. .

How to use css radial gradient

The operating environment of this tutorial: Windows7 system, HTML5&&CSS3 version. This method is suitable for all brands of computers.

Recommended: "css video tutorial"

Radial gradients: From the starting point to the end point, the color performs a circular gradient from the inside to the outside.

Syntax

background:radial-gradient(center,shape size,start-color,……,last-color);

Radial Gradient-Set Shape

Syntax:

background:radial-gradient(shape,start-color,……,last-color);

Description:

shape value can take two

circle——circle

ellipse——ellipse (default)

radial gradient-size keyword

size keyword is OK to end The position of the color. The default value is farthest-corner.

Syntax

background:radial-gradient(size,start-color,……,last-color);

size value is the following four keywords:

closest-side: the closest side

farthest-side: the farthest side

closest-corner: closest corner

farthest-corner: farthest corner

Example:

div {
     width: 300px;
     height: 200px;
     /* Safari 5.1 - 6.0 */
     background: -webkit-radial-gradient(30% 70%, farthest-side, blue, green, yellow, black);
     /* Opera 11.6 - 12.0 */
     background: -o-radial-gradient(30% 70%, farthest-side, blue, green, yellow, black);
     /* Firefox 3.6 - 15 */
     background: -moz-radial-gradient(30% 70%, farthest-side, blue, green, yellow, black);
     /* 标准的语法 */
     background: radial-gradient(30% 70%, farthest-side, blue, green, yellow, black);
   }

Radial Gradient-Circle Center Position

Grammar:

background:radial-gradient(level-percent vertical-percent,start-color,……,last-color);

Note: The standard syntax at the center of the circle is currently poorly supported by mainstream browsers, so you need to pay attention to adding the browser prefix.

General usage:

-webkit-background:radial-gradient(level-percent vertical-percent,start-color,……,last-color);
-o-background:radial-gradient(level-percent vertical-percent,start-color,……,last-color);
-moz-background:radial-gradient(level-percent vertical-percent,start-color,……,last-color);
background:radial-gradient(level-percent vertical-percent,start-color,……,last-color);

Thinking: 1. What is the meaning of the percentage value behind the color in the gradient?

3-12 Programming exercises

Friends, I have learned CSS3 radial gradient. According to the renderings, I added the code to achieve:

(1) Taking the center (60% 40%) as the starting point, set the center of the circle to the nearest edge, the roundest edge, Four radial gradient effects: closest corner and roundest corner.

(2) The shape of the radial gradient is a circle

(3) The colors from the inside to the outside are red, yellow, green, and blue

The effect picture is as follows

How to use css radial gradient

Task

Set the background color radial gradient for each of the four elements

(1)Set the radial gradient size to the nearest edge , farthest edge, closest corner, farthest corner

(2)The center of the gradient is 60% and 40%

(3)The shape of the gradient is a circle

(4) The gradient colors are red, yellow, green, and blue from the inside to the outside.

Reference code:

<!DOCTYPE html>
<html>
 
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
 
    <title>径向渐变</title>
    <style>
        div {
            width: 200px;
            height: 300px;
            float: left;
            margin: 100px 0 0 100px;
        }
 
        /* 补充代码，分别写出4个元素的背景渐变效果 */
 
        .div1 {
            background: -webkit-radial-gradient(60% 40%,closest-side circle, red,yellow,green,blue);
            /* Opera 11.6 - 12.0 */
            background: -o-radial-gradient(60% 40%,closest-side circle, red,yellow,green,blue);
            /* Firefox 3.6 - 15 */
            background: -moz-radial-gradient(60% 40%,closest-side circle, red,yellow,green,blue);
            /* 标准的语法 */
            background: radial-gradient(60% 40%,closest-side circle, red,yellow,green,blue);
        }
        .div2 {
            background: -webkit-radial-gradient(60% 40%,farthest-side circle, red,yellow,green,blue);
            /* Opera 11.6 - 12.0 */
            background: -o-radial-gradient(60% 40%,farthest-side circle, red,yellow,green,blue);
            /* Firefox 3.6 - 15 */
            background: -moz-radial-gradient(60% 40%,farthest-side circle, red,yellow,green,blue);
            /* 标准的语法 */
            background: radial-gradient(60% 40%,farthest-side circle, red,yellow,green,blue);
        }
        .div3 {
            background: -webkit-radial-gradient(60% 40%,closest-corner circle, red,yellow,green,blue);
            /* Opera 11.6 - 12.0 */
            background: -o-radial-gradient(60% 40%,closest-corner circle, red,yellow,green,blue);
            /* Firefox 3.6 - 15 */
            background: -moz-radial-gradient(60% 40%,closest-corner circle, red,yellow,green,blue);
            /* 标准的语法 */
            background: radial-gradient(60% 40%,closest-corner circle, red,yellow,green,blue);
        }
        .div4 {
            background: -webkit-radial-gradient(60% 40%,farthest-corner circle, red,yellow,green,blue);
            /* Opera 11.6 - 12.0 */
            background: -o-radial-gradient(60% 40%,farthest-corner circle, red,yellow,green,blue);
            /* Firefox 3.6 - 15 */
            background: -moz-radial-gradient(60% 40%,farthest-corner circle, red,yellow,green,blue);
            /* 标准的语法 */
            background: radial-gradient(60% 40%,farthest-corner circle, red,yellow,green,blue);
        }
    </style>
</head>
 
<body>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
</body>
 
</html>

Radial Gradual-Repeating Gradient

background:repeating-radial-gradient(color1 length|percent,color2 length|percent,……);

3-14 Programming Exercise

Friends, we have learned CSS3 Radial Repeating gradients in gradients, next, write the code based on the renderings to implement repeated radial gradients of multiple rainbow balls with the center of the element as the origin.

(1) The 7 colors of the rainbow are required. The value range starts from 0% and increases by 5% at a time. For example, red is 0%, orange is 5%, yellow is 10%, and so on

(2) Tips: The color of the rainbow ball can be expressed in English words

(3) The rendering is as follows:

How to use css radial gradient

Reference code:

<!DOCTYPE html>
<html>
 
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no">
 
    <title>径向渐变</title>
    <style>
        div {
            width: 400px;
            height: 400px;
            /* 补充代码 */
            background: -webkit-repeating-radial-gradient(closest-side circle, red 0%,orange 5%,yellow 10%,green 15%,blue 20%,indigo 25%,purple 30%);
            /* Opera 11.6 - 12.0 */
            background: -o-repeating-radial-gradient( closest-side circle,red 0%,orange 5%,yellow 10%,green 15%,blue 20%,indigo 25%,purple 30%);
            /* Firefox 3.6 - 15 */
            background: -moz-repeating-radial-gradient(closest-side circle,red 0%,orange 5%,yellow 10%,green 15%,blue 20%,indigo 25%,purple 30%);
            /* 标准的语法 */
            background: repeating-radial-gradient( closest-side circle, red 0%,orange 5%,yellow 10%,green 15%,blue 20%,indigo 25%,purple 30%);
        }
    </style>
</head>
 
<body>
    <div></div>
 
</body>
 
</html>

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