web前端|css教程
css,reset,样式
web前端-css教程
最近看到一个词叫css reset。什么叫做css
reset呢？我理解为重置css，也就是重置默认样式。
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我在HTML下的默认样式中讲到，一些标签元素在HTML下有一个默认属性值，我们在写css页面的时候，为了避免在css中重复定义它们，我们需要重置默认样式（css
reset）。每个人的用法和写法都不一样。找到一篇关于css reset的调查文章， 可以看看国外使用css reset的比例调查。
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接下来我也查看了国内的两个网站，用Firebug按F12看看他们的css reset怎么写的？
淘宝：
html { overflow-x:auto; overflow-y:scroll; } body, dl, dt, dd, ul, ol, li, pre, form, fieldset, input, p, blockquote, th, td { font-weight:400; margin:0; padding:0; } h1, h2, h3, h4, h4, h5 { margin:0; padding:0; } body { background-color:#FFFFFF; color:#666666; font-family:Helvetica,Arial,sans-serif; font-size:12px; padding:0 10px; text-align:left; } select { font-size:12px; } table { border-collapse:collapse; } fieldset, img { border:0 none; } fieldset { margin:0; padding:0; } fieldset p { margin:0; padding:0 0 0 8px; } legend { display:none; } address, caption, em, strong, th, i { font-style:normal; font-weight:400; } table caption { margin-left:-1px; } hr { border-bottom:1px solid #FFFFFF; border-top:1px solid #E4E4E4; border-width:1px 0; clear:both; height:2px; margin:5px 0; overflow:hidden; } ol, ul { list-style-image:none; list-style-position:outside; list-style-type:none; } caption, th { text-align:left; } q:before, q:after, blockquote:before, blockquote:after { content:""; }
百度有啊()：（架构基本上是模仿YUI来做的）
body { font-family:arial,helvetica,sans-serif; font-size:13px; font-size-adjust:none; font-stretch:normal; font-style:normal; font-variant:normal; font-weight:normal; line-height:1.4; text-align:center; } body, ul, ol, dl, dd, h1, h2, h3, h4, h5, h6, p, form, fieldset, legend, input, textarea, select, button, th, td { margin:0; padding:0; } h1, h2, h3, h4, h5, h6 { font-size:100%; font-weight:normal; } table { font-size:inherit; } input, select { font-family:arial,helvetica,clean,sans-serif; font-size:100%; font-size-adjust:none; font-stretch:normal; font-style:normal; font-variant:normal; font-weight:normal; line-height:normal; } button { overflow:visible; } th, em, strong, b, address, cite { font-style:normal; font-weight:normal; } li { list-style-image:none; list-style-position:outside; list-style-type:none; } img, fieldset { border:0 none; } ins { text-decoration:none; }
在《超越css》一书中建议我们做网站开始重置所有默认样式：
/* Normalizes margin,padding */ body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,p,blockquote,th,td { margin:0;padding:0} /* Normalizes font-size for headers */ h1,h2,h3,h4,h5,h6 { font-size:100%} /* Removes list-style from lists */ ol,ul { list-style:none } /* Normalizes font-size and font-weight to normal */ address,caption,cite,code,dfn,em,strong,th,var { font-size:normal; font-weight:normal } /* Removes list-style from lists */ table { border-collapse:collapse; border-spacing:0 } /* Removes border from fieldset and img */ fieldset,img { border:0 } /* Left-aligns text in caption and th */ caption,th { text-align:left } /* Removes quotation marks from q */ q:before,q:after { content:\}
那我们实际写代码的时候该怎么来css reset呢？
我个人推荐使用（Eric Meyer和YUI）的 css reset
Eric Meyers Reset: html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, font, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; } body { line-height: 1; } ol, ul { list-style: none; } blockquote, q { quotes: none; } blockquote:before, blockquote:after, q:before, q:after { content: \; content: none; } /* remember to define focus styles! */ :focus { outline: 0; } /* remember to highlight inserts somehow! */ ins { text-decoration: none; } del { text-decoration: line-through; } /* tables still need cellspacing="0" in the markup */ table { border-collapse: collapse; border-spacing: 0; } YUI: body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td { margin:0; padding:0; } table { border-collapse:collapse; border-spacing:0; } fieldset,img { border:0; } address,caption,cite,code,dfn,em,strong,th,var { font-style:normal; font-weight:normal; } ol,ul { list-style:none; } caption,th { text-align:left; } h1,h2,h3,h4,h5,h6 { font-size:100%; font-weight:normal; } q:before,q:after { content:\; } abbr,acronym { border:0; }
结合他们的css
reset写法，再根据自己的实际情况，一定能写出符合自己网站的完美的css reset。
