background-clip
(指定背景绘制区域)
ackground-clip: border-box / padding-box / content-box; /*没有padding的时候,content-box和padding-box效果同样*/ 复制代码
兼容性:IE9+、FireFox、Chrome、Safari、Operacss
background-position
(背景定位)
background-position: px / % ...; 复制代码
background-origin
(设置元素背景图片的原始起始位置)
background-origin: padding-box|border-box|content-box; 复制代码
兼容性:IE9+、FireFox4+、Chrome、Safari5+、Operahtml
background-size
(指定背景图片大小)
background-size: px / % / cover / contain; /*cover:把背景图片扩展至足够大,以使背景图片彻底覆盖区域(即彻底不留白) contain:把图像扩展至最大尺寸,以使其宽度和高度彻底适应内容区域(至少知足一边不留白)*/ 复制代码
兼容性:IE9+、FireFox4+、Chrome、Safari5+、Operaweb
background-image: url(img1.jpg), url(img2.png);
/*img1放前面,img2放后面*/
复制代码
线性渐变 - 从上到下
(默认)
background: linear-gradient(direction, color-stop1, color-stop2, ...); 复制代码
兼容性:IE10+、FireFox16+(3.6 –moz-内核)、Chrome26+(10.0 –webkit-)、Safari6.1+(5.1 –>webkit-)、Opera12.1+(11.6 –o-)浏览器
线性渐变 - 从左到右
background:-webkit-linear-gradient( begin-direction, color-stop1, color-stop2, ...); background: -moz-linear-gradient( end-direction, color-stop1, color-stop2, ...); background: -o-linear-gradient( end-direction, color-stop1, color-stop2, ...); background: linear-gradient(to end-direction, color-stop1, color-stop2, ...); /*注意webkit是起始方向*/ 复制代码
线性渐变 – 对角
background:-webkit-linear-gradient( begin-level begin-vertical, color-stop1, color-stop2, ...); background: -moz-linear-gradient( end-level end-vertical,color-stop1, color-stop2, ...); background: -o-linear-gradient( end-level end-vertical,color-stop1, color-stop2, ...); background: linear-gradient( to end-level end-vertical,color-stop1, color-stop2, ...); /*注意webkit是起始方向*/ 复制代码
线性渐变 – 自定义角度
background:-webkit-linear-gradient(angle, color-stop1, color-stop2, ...); //默认从左往右 background: -moz-linear-gradient(angle, color-stop1, color-stop2, ...); //默认从下往上 background: -o-linear-gradient(angle, color-stop1, color-stop2, ...); //默认从下往上 background: linear-gradient(angle, color-stop1, color-stop2, ...); //默认从下往上(优先级高) /*angle单位deg*/ 复制代码
线性渐变 – 颜色结点自定义分布
语法:同上,并在颜色值后加上 “空格+百分比”
(透明色:transparent)ide
线性渐变 – 重复渐变
语法:同上,并在linear前加repeating-ui
径向渐变
background: radial-gradient(center, shape size, start-color, ..., last-color); /*center默认居中,可不写 center值改成:px / %等可定位圆心位置*/ 复制代码
径向渐变 - 颜色结点均匀分布
(默认)
background:-webkit-radial-gradient(color-stop1, color-stop2, ...); background: -moz-radial-gradient(color-stop1, color-stop2, ...); background: -o-radial-gradient(color-stop1, color-stop2, ...); background: radial-gradient(color-stop1, color-stop2, ...); 复制代码
径向渐变 - 颜色结点自定义分布
语法:与线性同理url
径向渐变 – 设置形状
background:-webkit-radial-gradient(shape, color-stop1, color-stop2, ...); background: -moz-radial-gradient(shape, color-stop1, color-stop2, ...); background: -o-radial-gradient(shape, color-stop1, color-stop2, ...); background: radial-gradient(shape, color-stop1, color-stop2, ...); /*shape的值: circle —— 圆形 ellipse —— 椭圆(默认)*/ 复制代码
径向渐变 – 尺寸大小
(关键字的使用)
background:-webkit-radial-gradient(size, color-stop1, color-stop2, ...); background: -moz-radial-gradient(size, color-stop1, color-stop2, ...); background: -o-radial-gradient(size, color-stop1, color-stop2, ...); background: radial-gradient(size, color-stop1, color-stop2, ...); /*关键字size说明(相对圆心) closest-side:最近边 farthest-side:最远边 closest-corner:最近角 farthest-corner:最远角*/ 复制代码
径向渐变 – 重复渐变
语法:与线性同理spa
IE低版本浏览器的渐变
filter:progid:DXImageTransform.Microsoft.gradient( >StartColorstr='color1',EndColorstr='color2',GradientType=0); 复制代码
综合案例:
![]()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>综合</title>
<style type="text/css"> div { width: 800px; height: 500px; background: #abcdef; background-size: 50px 50px; background-image: -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.25, #555), color-stop(.25, transparent), to(transparent)), -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, #555), color-stop(.25, transparent), to(transparent)), -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.75, transparent), color-stop(.75, #555)), -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.75, transparent), color-stop(.75, #555)); background-image: -moz-linear-gradient(45deg, #555 25%, transparent 25%, transparent), -moz-linear-gradient(-45deg, #555 25%, transparent 25%, transparent), -moz-linear-gradient(45deg, transparent 75%, #555 75%), -moz-linear-gradient(-45deg, transparent 75%, #555 75%); background-image: -o-linear-gradient(45deg, #555 25%, transparent 25%, transparent), -o-linear-gradient(-45deg, #555 25%, transparent 25%, transparent), -o-linear-gradient(45deg, transparent 75%, #555 75%), -o-linear-gradient(-45deg, transparent 75%, #555 75%); background-image: linear-gradient(45deg, #555 25%, transparent 25%, transparent), linear-gradient(-45deg, #555 25%, transparent 25%, transparent), linear-gradient(45deg, transparent 75%, #555 75%), linear-gradient(-45deg, transparent 75%, #555 75%); } </style>
</head>
<body>
<div></div>
</body>
</html>复制代码