CSS Specifics for Internet Explorer (IE hacks)

#1 IE Conditional Comments

IE conditional comment is probably the most commonly used to fix the IE bugs for specific versions (IE6, IE7, IE8). Below are some sample code to target different versions of Internet Explorer:

#2 CSS Rules Specific to Explorer (IE CSS hacks)

Another option is to declare CSS rules that can only be read by Explorer. For example, add an asterisk (*) before the CSS property will target IE7 or add an underscore before the property will target IE6. However, this method is not recommended because they are not valid CSS syntax.

IE8 or below: to write CSS rules specificially to IE8 or below, add a backslash and 9 (\9) at the end before the semicolon.
IE7 or below: add an asterisk (*) before the CSS property.
IE6: add an underscore (_) before the property.

.box {

background: gray; /* standard */

background: pink\9; /* IE 8 and below */

*background: green; /* IE 7 and below */

_background: blue; /* IE 6 */


#3 Conditional HTML Class

The third option, which was founded by Paul Irish, is to add an CSS class with the IE version to the HTML tag by using IE conditional comments. Basicially, it checks if it is IE, then add a class to the html tag. So to target specific IE version, simply use the IE class as the parent selector (eg. .ie6 .box). This is a clever way and it doesn’t cause any validation errors.

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