1.使用css缩写
使用缩写可以帮助减少你CSS文件的大小,更加容易阅读。css缩写的主要规则请参看《常用css缩写语法总结》,css缩写的主要规则如下:
颜色
16进制的色彩值,如果每两位的值相同,可以缩写一半,例如:
#000000可以缩写为#000;#336699可以缩写为#369;
注意:在同一个CSS配置节中,不要交错使用全写和缩写的颜色配置,在系统资源极低时,会导致浏览器渲染失败。
盒尺寸
通常有下面四种书写方法:
方便的记忆方法是顺时针,上右下左。具体应用在margin和padding的例子如下:
margin:1em 0 2em 0.5em;
边框(border)
边框的属性如下:
可以缩写为一句:border:1px solid #000;
语法是border:width style color;
背景(Backgrounds)
背景的属性如下:
可以缩写为一句:background:#f00 url(background.gif) no-repeat fixed 0 0;
语法是background:color image repeat attachment position;
你可以省略其中一个或多个属性值,如果省略,该属性值将用浏览器默认值,默认值为:
http://roucheng.cnblogs.com/
字体(fonts)
字体的属性如下:
可以缩写为一句:font:italic small-caps bold 1em/140% "Lucida Grande",sans-serif;
注意,如果你缩写字体定义,至少要定义font-size和font-family两个值。
列表(lists)
取消默认的圆点和序号可以这样写list-style:none;,
list的属性如下:
可以缩写为一句:list-style:square inside url(image.gif);

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