css reset 代码及作用

css reset的作用是我们自己重定义浏览器默认样式。好处是，可以统一浏览器默认样式，提高浏览器兼容性。对于常用的代码，作为common css引入。定义好框架总体样式。

一般前端工程师在开发前端样式时，都会引入一个公共的reset样式代码块，下面的代码是我常用的一个css reset代码段，分享给大家！

 常用比较标准的css reset 代码

    *{word-wrap:break-word}
    html,body,h1,h2,h3,h4,h5,h6,hr,p,iframe,dl,dt,dd,ul,ol,li,pre,form,button,input,textarea,th,td,fieldset{margin:0;padding:0}
    ul,ol,dl{list-style-type:none}
    html,body{*position:static}
    html{font-family: sans-serif;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}
    address,caption,cite,code,dfn,em,th,var{font-style:normal;font-weight:400}
    input,button,textarea,select,optgroup,option{font-family:inherit;font-size:inherit;font-style:inherit;font-weight:inherit}
    input,button{overflow: visible;vertical-align:middle;outline:none}
    body,th,td,button,input,select,textarea{font-family:"Microsoft Yahei","Hiragino Sans GB","Helvetica Neue",Helvetica,tahoma,arial,Verdana,sans-serif,"WenQuanYi Micro Hei","\5B8B\4F53";font-size:12px;color: #333;-webkit-font-smoothing: antialiased;-moz-osx-font-smoothing:grayscale}
    body{line-height:1.6}
    h1,h2,h3,h4,h5,h6{font-size:100%}
    a,area{outline:none;blr:expression(this.onFocus=this.blur())}
    a{text-decoration:none;cursor: pointer}
    a:hover{text-decoration:underline;outline:none}
    a.ie6:hover{zoom:1}
    a:focus{outline:none}
    a:hover,a:active{outline:none}:focus{outline:none}
    sub,sup{vertical-align:baseline}
    button,input[type="button"], input[type="submit"] {line-height:normal !important}
    /*img*/
    img{border:0;vertical-align:middle}
    a img,img{-ms-interpolation-mode:bicubic}
    .img-responsive{max-width: 100%;height: auto}
     
    /*IE下a:hover 背景闪烁*/
    *html{overflow:-moz-scrollbars-vertical;zoom:expression(function(ele){ele.style.zoom = "1";document.execCommand("BackgroundImageCache",false,true)}(this))}

     
    /*HTML5 reset*/
    header,footer,section,aside,details,menu,article,section,nav,address,hgroup,figure,figcaption,legend{display:block;margin:0;padding:0}time{display:inline}
    audio,canvas,video{display:inline-block;*display:inline;*zoom:1}
    audio:not([controls]){display:none}
    legend{width:100%;margin-bottom:20px;font-size:21px;line-height:40px;border:0;border-bottom:1px solid #e5e5e5}
    legend small{font-size:15px;color:#999}
    svg:not(:root) {overflow: hidden}
    fieldset {border-width:0;padding: 0.35em 0.625em 0.75em;margin: 0 2px;border: 1px solid #c0c0c0}
    input[type="number"]::-webkit-inner-spin-button,input[type="number"]::-webkit-outer-spin-button {height: auto}
    input[type="search"] {-webkit-appearance: textfield; /* 1 */-moz-box-sizing: content-box;-webkit-box-sizing: content-box; /* 2 */box-sizing: content-box}
    input[type="search"]::-webkit-search-cancel-button,input[type="search"]::-webkit-search-decoration {-webkit-appearance: none}
    /*
    Name:			style_clearfix
    Example:		class="clearfix|cl"
    Explain:		Clearfix（简写cl）避免因子元素浮动而导致的父元素高度缺失能问题
    */
    .cl:after,.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden}.cl,.clearfix{zoom:1}