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IE10 CSS Hacks

IE10 HacksLast year, Microsoft announced that IE10 will not be supporting conditional comments. With their history, this is obviously a risky move. Up to now, to target quirky behaviour in IE6-9, developers have been using conditional comments, conditional classes, and other IE-specific hacks.


But without conditional comments in IE10, the only options we’re left with to target CSS problems are hacks or browser sniffing — and we certainly don’t want to resort to the latter.


Interestingly, there have been a few posts and code snippets floating around that apparently do target IE10 specifically using a hack. Below is a summary of these three techniques, for reference.


Feature Detecting @cc_on


This interesting bit of code is discussed on this Reddit thread, and comes from someone named Rob W., who posted this code snippet on a StackOverflow thread.


The script is inside of an IE-excluding conditional comment to ensure that IE6-9 don’t recognize it, and then it feature detects something called @cc_on. Here it is:



<!--[if !IE]><!--<script>
if (/*@cc_on!@*/false) {
    document.documentElement.className+=' ie10';
}
</script><!--<![endif]-->

This appends a class of “ie10” to the <html> element, similar to what conditional classes do. Then in your CSS, just use the “ie10” class:



.ie10 .example {
   /* IE10-only styles go here */
}

I don’t know anything about this @cc_on statement, but it seems to work on my IE10 PP. Also, I would assume this would also work in IE11, so this hack might cause problems in the future.


And unlike the other two solutions in this post, this one’s actually reliant on JavaScript, so that’s another point against it.


JS Bin demo


@media -ms-high-contrast Hack


This one comes from a gist by German developer Alex Kloss. It takes advantage of two things: 1) The fact that IE10 supports media queries; and 2) The fact that IE10 supports -ms-high-contrast as a media query option, which IE9 doesn’t support.



@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
   /* IE10-specific styles go here */
}

According to Alex, this targets IE10 in both high contrast and default mode, which will evidently cover all stable versions of IE10.


This hack doesn’t work in older Platform Preview releases, because it seems that -ms-high-contrast wasn’t supported in those. I can confirm that it doesn’t work in IE10PP2.


Also, as Alex points out in the comments on the gist, this will also target IE11, so again this may not be a great choice.


JS Bin demo


@media Zero Hack


Finally, this one will target both IE9 and IE10, but nothing else. Not exactly ideal, but it’s an option if you need it.


I don’t know who came up with this one, but it’s documented on Keith Clark’s blog.



@media screen and (min-width:0\0) {
    /* IE9 and IE10 rule sets go here */
}

This one might eventually be the best choice, but maybe not at the moment. Eventually, IE9 users are supposed to get notified via Windows Update to upgrade to IE10. This is supposed to include Windows 7 users. If this happens (and I’m not holding my breath), eventually IE9′s market share will be taken over by IE10, the same way this happens with other browsers that auto-update.


And in addition to that, if this parsing bug is fixed in IE11, then that means it will also be future proof. But we won’t know until IE11 is released.


JS Bin demo


Concluding Warnings


Truth is, you shouldn’t have to use a CSS hack for a browser like IE10, or even IE9. Use a good CSS workflow and apply good principles when writing your code.


And in most cases when things differ, you should either be able to feature detect to fill in the gaps, or else use graceful degradation to allow acceptable experiences in IE10.


So take this post with a grain of salt and only use these hacks if you’re desperate and you’re on a tight deadline.


If anyone has any other info on these, or knows of any other ways to target IE10, comment and I’ll update accordingly.


Photo credit: Hacksaw on white from Bigstock



Related posts:



  1. How Do I Target IE7 or IE8 Using CSS Hacks?

  2. Dropping -ms- Vendor Prefixes for IE10

  3. Loading a Different jQuery Version for IE6-8








via Impressive Webs http://www.impressivewebs.com/ie10-css-hacks/

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