Frontend design: IE6/IE7/IE8/IE9/FF hack

HACK principle: different browsers recognize different characters

Special Character Recognition tables are commonly used in CSS: (1 )*:IE6 + IE7Yes, but the standard browser FF + IE8 cannot recognize; (2 )! Important: Except IE6, it cannot be recognized! Outside important,FF + IE8 + IE7Yes! Important; (3) _: DivisionIE6Supported _ external, FF + IE8 + IE7 are not supported _; (4) \ 9: AllIERecognize all browsers (IE6, IE7, IE8, and IE9)

Example:

(1) Difference between FF (IE8) and IE6 IE7

Backgorund: orange; FF and IE8 background colors will be orange

* Backgorund: red; the background colors of IE6 and IE7 will be red.

(2) Difference between FF (IE8) and IE6 and IE7

Background: orange; FF and IE8 background colors will be orange

* Background: red! Important; IE7 background color will be red

* Background: blue; the background color of IE6 is blue.

(3) Difference between FF (IE8) and IE6 and IE7

Background: orange; FF and IE8 background colors will be orange

* Background: red; the background color of IE7 is red.

_ Background: blue; IE6 background color will be blue

(4) Difference between FF and IE6 IE7 IE8 IE9

Color: gray; FF and other non-IE browser font colors will be gray

Color: red \ 9; IE8 IE9 font color will be red

* Color: green; The IE7 font color will be green

_ Color: blue; IE6 font color will be blue

Tip:CSS
HACK writing sequence: first write the style required by FF and other non-ie browsers, then write the style required by IE8, then IE7, and then IE6!

Summary:In practice, I feel less useful! Important
As long as you remember "*" and "_", I think it is enough to distinguish FF (IE8) from IE6 and IE7.