径向渐变由其中心定义。
要创建径向渐变,您还必须定义至少两个色标。
background-image: radial-gradient(shape size at position, start-color, ..., last-color);
默认情况下,形状为椭圆形,大小为最远角,位置为中心。
径向渐变 - 均匀间隔的色标(这是默认值)
以下示例显示了具有均匀间隔色标的径向渐变:
#grad {
background-image: radial-gradient(red, yellow, green);
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 150px;
width: 200px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(red, yellow, green);
}
</style>
</head>
<body>
<h1>Radial Gradient - Evenly Spaced Color Stops</h1>
<div id="grad1"></div>
</body>
</html>
径向渐变 - 不同间距的色标
以下示例显示了具有不同间隔色标的径向渐变:
#grad {
background-image: radial-gradient(red 5%, yellow 15%, green 60%);
}
自己尝试一下 →
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 150px;
width: 200px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(red 5%, yellow 15%, green 60%);
}
</style>
</head>
<body>
<h1>Radial Gradient - Differently Spaced Color Stops</h1>
<div id="grad1"></div>
</body>
</html>
形状参数定义形状。它可以取值圆或椭圆。默认值为椭圆。
以下示例显示了圆形的径向渐变:
#grad {
background-image: radial-gradient(circle, red, yellow, green);
}
自己尝试一下 →
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 150px;
width: 200px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(red, yellow, green);
}
#grad2 {
height: 150px;
width: 200px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(circle, red, yellow, green);
}
</style>
</head>
<body>
<h1>Radial Gradient - Shapes</h1>
<h2>Ellipse (this is default):</h2>
<div id="grad1"></div>
<h2><strong>Circle:</strong></h2>
<div id="grad2"></div>
</body>
</html>
size
参数定义渐变的大小。它可以采用四个值:
closest-side
farthest-side
closest-corner
farthest-corner
具有不同大小关键字的径向渐变:
#grad1 {
background-image: radial-gradient(closest-side at 60% 55%, red, yellow,
black);
}
#grad2 {
background-image: radial-gradient(farthest-side at 60%
55%, red, yellow, black);
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 150px;
width: 150px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(closest-side at 60% 55%, red, yellow, black);
}
#grad2 {
height: 150px;
width: 150px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(farthest-side at 60% 55%, red, yellow, black);
}
#grad3 {
height: 150px;
width: 150px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(closest-corner at 60% 55%, red, yellow, black);
}
#grad4 {
height: 150px;
width: 150px;
background-color: red; /* For browsers that do not support gradients */
background-image: radial-gradient(farthest-corner at 60% 55%, red, yellow, black);
}
</style>
</head>
<body>
<h1>Radial Gradients - Different size keywords</h1>
<h2>closest-side:</h2>
<div id="grad1"></div>
<h2>farthest-side:</h2>
<div id="grad2"></div>
<h2>closest-corner:</h2>
<div id="grad3"></div>
<h2>farthest-corner (default):</h2>
<div id="grad4"></div>
</body>
</html>
repeating-radial-gradient()
函数用于重复径向渐变:
重复的径向渐变:
#grad {
background-image:
repeating-radial-gradient(red, yellow 10%, green 15%);
}
自己尝试一下→
<!DOCTYPE html>
<html>
<head>
<style>
#grad1 {
height: 150px;
width: 200px;
background-color: red; /* For browsers that do not support gradients */
background-image: repeating-radial-gradient(red, yellow 10%, green 15%);
}
</style>
</head>
<body>
<h1>Repeating Radial Gradient</h1>
<div id="grad1"></div>
</body>
</html>