Question

In order to get CSS3 effects (border-radius, box-shadow…) on IE 6/7/8, I’m using css3pie.

However, css3pie generates some css3-container (v1) / css3pie (v2) tags in DOM, which disorders the expected architecture. Here is an example:

CSS

pre {
    border: 1px solid #aaa;
    border-radius: 5px;
    behavior: url(pie.htc);
}

HTML

<div class="foo">bar</div>
<p class="getme">paragraph</p>
<pre>preformatted</pre>

jQuery

// undefined        expected: getme
alert($("pre").prev().attr("class"));

// css3-container   expected: p
alert($("pre").prev()[0].tagName);

// getme            expected: foo
alert($("pre").prev().prev().attr("class"));

// 4                expected: 3
alert($("body").children().size());

// will not set     expected: Impact
$("p+pre").css({fontFamily: "Impact"});

// it almost affects all such jQuery selctors

The actual generated source is like this:

<DIV class="foo">bar</DIV>
<P class="paragraph">paragraph</P>
<css3-container...>
    <border...>
        <shape...><stroke></stroke><stroke></stroke></shape>
    </border>
</css3-container>
<PRE>preformatted</PRE>

Has anyone encountered this kind of problems? Any workaround? Is there an alternative to css3pie to get CSS3 working on IE 6/7/8?

Answer 1

I tried using CSS3PIE too, and faced similar problems (mostly with jquery and mediaqueries). I found no easy/practical solution for all the problems it causes, indeed.

My advice would be to use Modernizr’s load to progressively enhance older IE’s user experience. It requires an harder/longer process, as you’ve to setup a single polyfill for each and every CSS3 feature. As mario.tco already told you, there’s a list of cross-browser polyfills on Modernizr’s repo. And here’s a list of feature detection snippets.

Also have a look at html5please and caniuse.

In regard to IE6 and 7, unless your site statistics indicate something different, usage rates are below 1% on average (with some exceptions, check ie6countdown), so you can almost ignore them. However, with conditional comments you can target each IE<10 version with specific fallbacks.

Keep in mind that you don’t really need to have box-shadows and other visual decorations (unless they are needed for usability) on IE<9. Indeed, any fallback will probably cause a huge performance problem (think about what hardware an IE7 user could have). Websites don’t need to look exactly the same in any browser.