Css condition annotation theory and practice source file _ experience exchange

Css condition annotation theory and practice source file browser condition annotation theory. The following example is used to explain this problem.

(X) HTML

The following code is used to test the effect of the condition comment statement in Microsoft's IE browser.








The following code is a condition comment for running in a non-IE browser


You are not using Internet Explorer

It eventually works in non-IE and special IE browsers
(Or use lte lt or gt gte to determine, for example:

).


You are using Internet Explorer version 6

Or a non-IE browser


From: cssplay. co. uk/menu/conditional.html "target =" _ blank "> http://www.cssplay.co.uk/menu/conditional.html

The condition annotation mentioned above is to determine the browser type and then define what content is displayed under the browser.

This dropmenu (drop-down menu) model comes from cssplay, which is made after many researches and repeated tests by the author. I want to use this model to illustrate the principle of conditional annotation.

First look at a simple model

Below is the xhtm

• DEMOS
  
  
  
  
  

  Zero dollars advertising page Wrapping text around images Styled form Active focus Hover/click with no borders Shadow boxing Image map for detailed information Fun with background images Fade scrolling Em image sizes compared

  
  
  
  

CSS



Bytes

First, let's see how css is defined in non-ie.
. Menu ul li ul {
Display: none;
}
/* Specific to non IE browsers */
. Menu ul li: hover {
Color: # fff;
Background: # bd8d5e;
}
/* Define the mouse over style */
. Menu ul li: hover ul {
Display: block;
Position: absolute;
Top: 3em;
Margin-top: 1px;
Left: 0;
Width: 150px;
}


In non-IE mode, the ul contained in li is displayed when the mouse slides over, because these browsers support li: hover usage.

Css in IE
. Menu ul li a: hover {
Color: # fff;
Background: # bd8d5e;
}
/* Ul display included in li when the mouse slides */
. Menu ul li a: hover ul {
Display: block;
Position: absolute;
Top: 3em;
Left: 0;
Background: # fff;
Margin-top: 0;
Marg \ in-top: 1px;
}

The final_drop.css style of the inheritance class. When there is no mouse time, the ul contained by li is not displayed.
Because

So when the mouse slides over IE6, a: hover is used to display the ul content.
In IE7, li: hover shows the same effect.