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[Codeschnipsel] The Internet Explorer 9 and the WBB 3.1

René

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Sunday, September 19th 2010, 3:09pm

The Internet Explorer 9 and the WBB 3.1

Some users of the first Beta Version or one of the previous Platform Previews may have wondered why the IE 9 ignores the CSS 3 declarations of WBB 3.1 - two things cause that behaviour:
  • First: not all styles (for example all styles by WoltLab) have the necessary declarations - the IE does not use so called vendor-prefixes, it interpretes the correct CSS 3.
    1 example: Firefox (lower than Version 4) needs "rounded corners" declared the following way:

    Cascading style sheet

    		 
    1

    .classname {-moz-border-radius: 10px;}

    Internet Explorer doesn't know this command, but uses the standard declaration

    Cascading style sheet

    		 
    1

    .classename {border-radius: 10px;}
  • Second: the WBB 3.1 disables the IE 9 mode and forces the browser to display the style as IE 8 did. That's because of IE 8's misbehaviour to always switch to compatiblity mode causing a lot of diplay errors.


The following code is the one forcing IE 9 to display like IE 8:

HTML

 
1

<meta http-equiv="X-UA-Compatible" content="IE=8" />

You'll fin that code snippet in the headInclude template.


In order to give IE 9 users the possibility to have all the declarations working the way they should, you can use the follwoing code snippet in your headInclude template using IE Conditional Comments.

HTML

 
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<!--[if IE 8]>
<meta http-equiv="X-UA-Compatible" content="IE=8" />
<![endif]-->

[html]<!--[if IE 9]>
<meta http-equiv="X-UA-Compatible" content="IE=9" />
<![endif]-->


the last part for IE 9 is essential avoiding IE 9 to switch to compatibility mode.


Attention: You use this code at your own risk. The standard templates can not be edited via ACP - and they shouldn't be edited. When updating the WBB the changes could be lost.
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This post has been edited 1 times, last edit by "René" (Sep 19th 2010, 4:33pm)

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