CSS样式重置 

重置默认样式
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。我在中讲到，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 可以看看国外使用css reset的比例调查。

 

这里有一篇总结css reset比较全面的文章，列举了多种css reset的写法，可以看看。

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（和）的 css reset

Eric Meyer's 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。

 

posted @ 2016-12-16 10:26  程序媛李李李李蕾  阅读(439)  评论(0)    收藏  举报