CSS hack原理与常见的hack

清疚 2022-06-10 00:11 165阅读 0赞

## **hack原理：** ##

原理：利用不同浏览器对CSS的支持和解析结果不一样编写针对特定浏览器样式。常见的hack有1）属性 hack。2）选择器hack。3）IE条件注释

IE条件注释：适用于\[IE5, IE9\]常见格式如下

**常见的hack**

选择器hack：不同浏览器对选择器的支持不一样

/***** Selector Hacks ******/
    /* IE6 and below */ 
    * html #uno { color: red }
    
    /* IE7 */ 
    *:first-child+html  #dos { color: red }
    
    /* IE7, FF, Saf, Opera */ 
    html>body #tres { color: red }
    
    /* IE8, FF, Saf, Opera (Everything but IE 6,7) */ html>/**/body #cuatro { color: red }
    
    /* Opera 9.27 and below, safari 2 */ 
    html:first-child #cinco { color: red }
    
    /* Safari 2-3 */ 
    html[xmlns*=""] body:last-child #seis { color: red }
    
    /* safari 3+, chrome 1+, opera9+, ff 3.5+ */ 
    body:nth-of-type(1) #siete { color: red }
    
    /* safari 3+, chrome 1+, opera9+, ff 3.5+ */
     body:first-of-type #ocho { color: red }
    
    /* saf3+, chrome1+ */ 
    @media screen   and (-webkit-min-device-pixel-ratio:0) {    #diez { color: red } }
    
    /* iPhone / mobile webkit */ 
    @media screen and (max-device-width: 480px) {
     #veintiseis { color: red } 
     }
    
    /* Safari 2 - 3.1 */
     html[xmlns*=""]:root #trece { color: red }
    
    /* Safari 2 - 3.1, Opera 9.25 */
     *|html[xmlns*=""]  #catorce { color: red }
    
    /* Everything but IE6-8 */
     :root *> #quince { color: red }
    
    /* IE7 */
     *+html #dieciocho { color: red }
    
    /* Firefox only. 1+ */
     #veinticuatro, x:-moz-any-link { color: red }
    
    /* Firefox 3.0+ */ 
    #veinticinco, x:-moz-any-link, x:default { color: red }

属性hack：不同浏览器解析bug或方法

/* IE6 */
     #once { _color: blue }
    /* IE6, IE7 */ 
    #doce { *color: blue; /* or #color: blue */ }
    
    /* Everything but IE6 */ 
    #diecisiete { color/**/: blue } /* IE6, IE7, IE8 */ 
    #diecinueve { color: blue\9; }
    
    /* IE7, IE8 */
     #veinte { color/*\**/: blue\9; }
    /* IE6, IE7 -- acts as an !important */
     #veintesiete { color: blue !ie; }/* string after ! can be anything */