线性渐变的实例:
线性渐变 - 从上到下(默认情况下)
下面的实例演示了从顶部开始的线性渐变。起点是红色,慢慢过渡到蓝色:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-linear-gradient(red, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(red, blue); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>线性渐变 - 从上到下</h3> <p>从顶部开始的线性渐变。起点是红色,慢慢过渡到蓝色:</p> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
线性渐变 - 从左到右
下面的实例演示了从左边开始的线性渐变。起点是红色,慢慢过渡到蓝色:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-linear-gradient(left, red , blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(right, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(right, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(to right, red , blue); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>线性渐变 - 从左到右</h3> <p>从左边开始的线性渐变。起点是红色,慢慢过渡到蓝色:</p> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
线性渐变 - 对角
你可以通过指定水平和垂直的起始位置来制作一个对角渐变。
下面的实例演示了从左上角开始(到右下角)的线性渐变。起点是红色,慢慢过渡到蓝色:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-linear-gradient(left top, red , blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(bottom right, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(bottom right, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(to bottom right, red , blue); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>线性渐变 - 对角</h3> <p>从左上角开始(到右下角)的线性渐变。起点是红色,慢慢过渡到蓝色:</p> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
带有指定的角度的线性渐变:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 100px; background: -webkit-linear-gradient(0deg, red, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(0deg, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(0deg, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(0deg, red, blue); /* 标准的语法(必须放在最后) */ } #grad2 { height: 100px; background: -webkit-linear-gradient(90deg, red, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(90deg, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(90deg, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(90deg, red, blue); /* 标准的语法(必须放在最后) */ } #grad3 { height: 100px; background: -webkit-linear-gradient(180deg, red, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(180deg, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(180deg, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(180deg, red, blue); /* 标准的语法(必须放在最后) */ } #grad4 { height: 100px; background: -webkit-linear-gradient(-90deg, red, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(-90deg, red, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(-90deg, red, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(-90deg, red, blue); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>线性渐变 - 使用不同的角度</h3> <div id="grad1" style="color:white;text-align:center;">0deg</div><br> <div id="grad2" style="color:white;text-align:center;">90deg</div><br> <div id="grad3" style="color:white;text-align:center;">180deg</div><br> <div id="grad4" style="color:white;text-align:center;">-90deg</div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
使用多个颜色结点
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-linear-gradient(red, green, blue); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(red, green, blue); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(red, green, blue); /* Firefox 3.6 - 15 */ background: linear-gradient(red, green, blue); /* 标准的语法(必须放在最后) */ } #grad2 { height: 200px; background: -webkit-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Firefox 3.6 - 15 */ background: linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* 标准的语法(必须放在最后) */ } #grad3 { height: 200px; background: -webkit-linear-gradient(red 10%, green 85%, blue 90%); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(red 10%, green 85%, blue 90%); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(red 10%, green 85%, blue 90%); /* Firefox 3.6 - 15 */ background: linear-gradient(red 10%, green 85%, blue 90%); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>3 个颜色结点(均匀分布)</h3> <div id="grad1"></div> <h3>7 个颜色结点(均匀分布)</h3> <div id="grad2"></div> <h3>3 个颜色结点(不均匀分布)</h3> <div id="grad3"></div> <p><strong>注意:</strong> 当未指定百分比时,颜色结点不会自动均匀分布。</p> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
下面的实例演示了如何设置多个颜色结点:
下面的实例演示了如何创建一个带有彩虹颜色和文本的线性渐变:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 55px; background: -webkit-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(left, red, orange, yellow, green, blue, indigo, violet); /* Firefox 3.6 - 15 */ background: linear-gradient(to right, red, orange, yellow, green, blue, indigo, violet); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <div id="grad1" style="text-align:center;margin:auto;color:#888888;font-size:40px;font-weight:bold"> 渐变背景 </div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
使用透明度(transparent)
下面的实例演示了从左边开始的线性渐变。起点是完全透明,慢慢过渡到完全不透明的红色:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-linear-gradient(left, rgba(255,0,0,0), rgba(255,0,0,1)); /* Safari 5.1 - 6.0 */ background: -o-linear-gradient(right, rgba(255,0,0,0), rgba(255,0,0,1)); /* Opera 11.1 - 12.0 */ background: -moz-linear-gradient(right, rgba(255,0,0,0), rgba(255,0,0,1)); /* Firefox 3.6 - 15 */ background: linear-gradient(to right, rgba(255,0,0,0), rgba(255,0,0,1)); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>线性渐变 - 透明度</h3> <p>为了添加透明度,我们使用 rgba() 函数来定义颜色结点。rgba() 函数中的最后一个参数可以是从 0 到 1 的值,它定义了颜色的透明度:0 表示完全透明,1 表示完全不透明。</p> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
重复的线性渐变
repeating-linear-gradient() 函数用于重复线性渐变:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 200px; background: -webkit-repeating-linear-gradient(red, yellow 10%, green 20%); /* Safari 5.1 - 6.0 */ background: -o-repeating-linear-gradient(red, yellow 10%, green 20%); /* Opera 11.1 - 12.0 */ background: -moz-repeating-linear-gradient(red, yellow 10%, green 20%); /* Firefox 3.6 - 15 */ background: repeating-linear-gradient(red, yellow 10%, green 20%); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>重复的线性渐变</h3> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
CSS3 径向渐变
径向渐变由它的中心定义。
为了创建一个径向渐变,你也必须至少定义两种颜色结点。颜色结点即你想要呈现平稳过渡的颜色。同时,你也可以指定渐变的中心、形状(原型或椭圆形)、大小。默认情况下,渐变的中心是 center(表示在中心点),渐变的形状是 ellipse(表示椭圆形),渐变的大小是 farthest-corner(表示到最远的角落)。
径向渐变的实例:
径向渐变 - 颜色结点均匀分布(默认情况下)
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 150px; width: 200px; background: -webkit-radial-gradient(red, green, blue); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(red, green, blue); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(red, green, blue); /* Firefox 3.6 - 15 */ background: radial-gradient(red, green, blue); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>径向渐变 - 颜色结点均匀分布</h3> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
径向渐变 - 颜色结点不均匀分布
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 150px; width: 200px; background: -webkit-radial-gradient(red 5%, green 15%, blue 60%); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(red 5%, green 15%, blue 60%); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(red 5%, green 15%, blue 60%); /* Firefox 3.6 - 15 */ background: radial-gradient(red 5%, green 15%, blue 60%); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>径向渐变 - 颜色结点不均匀分布</h3> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
设置形状
shape 参数定义了形状。它可以是值 circle 或 ellipse。其中,circle 表示圆形,ellipse 表示椭圆形。默认值是 ellipse。
形状为圆形的径向渐变
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 150px; width: 200px; background: -webkit-radial-gradient(red, yellow, green); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(red, yellow, green); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(red, yellow, green); /* Firefox 3.6 - 15 */ background: radial-gradient(red, yellow, green); /* 标准的语法(必须放在最后) */ } #grad2 { height: 150px; width: 200px; background: -webkit-radial-gradient(circle, red, yellow, green); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(circle, red, yellow, green); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(circle, red, yellow, green); /* Firefox 3.6 - 15 */ background: radial-gradient(circle, red, yellow, green); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>径向渐变 - 形状</h3> <p><strong>椭圆形 Ellipse(默认):</strong></p> <div id="grad1"></div> <p><strong>圆形 Circle:</strong></p> <div id="grad2"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
不同尺寸大小关键字的使用
size 参数定义了渐变的大小。它可以是以下四个值:
closest-side
farthest-side
closest-corner
farthest-corner
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 150px; width: 150px; background: -webkit-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* Firefox 3.6 - 15 */ background: radial-gradient(60% 55%, closest-side,blue,green,yellow,black); /* 标准的语法(必须放在最后) */ } #grad2 { height: 150px; width: 150px; background: -webkit-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* Firefox 3.6 - 15 */ background: radial-gradient(60% 55%, farthest-side,blue,green,yellow,black); /* 标准的语法(必须放在最后) */ } #grad3 { height: 150px; width: 150px; background: -webkit-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* Firefox 3.6 - 15 */ background: radial-gradient(60% 55%, closest-corner,blue,green,yellow,black); /* 标准的语法(必须放在最后) */ } #grad4 { height: 150px; width: 150px; background: -webkit-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Safari 5.1 - 6.0 */ background: -o-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Opera 11.6 - 12.0 */ background: -moz-radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* Firefox 3.6 - 15 */ background: radial-gradient(60% 55%, farthest-corner,blue,green,yellow,black); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>径向渐变 - 不同尺寸大小关键字的使用</h3> <p><strong>closest-side:</strong></p> <div id="grad1"></div> <p><strong>farthest-side:</strong></p> <div id="grad2"></div> <p><strong>closest-corner:</strong></p> <div id="grad3"></div> <p><strong>farthest-corner(默认):</strong></p> <div id="grad4"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>
重复的径向渐变
repeating-radial-gradient() 函数用于重复径向渐变:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>www.sinmeng.net</title> <style> #grad1 { height: 150px; width: 200px; background: -webkit-repeating-radial-gradient(red, yellow 10%, green 15%); /* Safari 5.1 - 6.0 */ background: -o-repeating-radial-gradient(red, yellow 10%, green 15%); /* Opera 11.6 - 12.0 */ background: -moz-repeating-radial-gradient(red, yellow 10%, green 15%); /* Firefox 3.6 - 15 */ background: repeating-radial-gradient(red, yellow 10%, green 15%); /* 标准的语法(必须放在最后) */ } </style> </head> <body> <h3>重复的径向渐变</h3> <div id="grad1"></div> <p><strong>注意:</strong> Internet Explorer 9 及之前的版本不支持渐变。</p> </body> </html>