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。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;text align center
}
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: 010px;
text-align: left;
}
select {
font-size: 12px;
}
table {
border-collapse: collapse;
}
fieldset, img {
border: 0none;
}
fieldset {
margin: 0;
padding: 0;
}
fieldset p {
margin: 0;
padding: 0008px;
}
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: 1px0;
clear: both;
height: 2px;
margin: 5px0;
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: 0none;
}
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;
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。

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