Should we use IE's CSS Dynamic properties?

Question

Should we use IE's CSS Dynamic properties?

I read IE8+ would not support these.

What is the best strategy to handle this?

Answer 1

If you mean CSS expressions, you should avoid them because they're slow.

Your question about how to avoid them is pretty vague. It would be easier to answer a more specific question. But here's a vague answer: Javascript. :)

Answer 2

They are very useful to solve incompatibility problems with older versions of IE, for example to get png transparency in IE6. I always (when needed...) include style-sheets using these functionalities in IE's conditional comments.

Answer 3

The dynamic properties wasn't anything that really took off. It could be used in applications that targeted IE only (i.e. intranets and such), but as it never became a standard and no other browser supports it, it never came into wide use on the web.

I haven't read what you say about IE8 not supporting dynamic properties, and I haven't tried it, but it sounds very plausible that the will not be supported when the browser renders a page in standards compliant mode. They will probably be supported in quirks mode for a few versions longer.