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Exploring CSS3 text-shadow

I consider CSS3’s text-shadow one of the most exciting CSS3* properties, which offers us a lot more effects than it’s name suggests. Of course, it can be used for creating drop shadows for text, and it carries out that task very well, but it’s inherent flexibility allows it to be also used for glow effects, outlines, bevels, extruded text, inset text, fuzzy text and many others (until browser bugs and backwards compatibility come into play… :(). This post is about various findings of mine (and others’, where a source is provided) regarding this property, including browser bugs and inconsistencies, effects that can be achieved with it, compatibility woes etc.

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On native, single-input, multiple file uploads

If you are following the current news on web development, you probably heard that the new Safari 4 has a great feature: It natively allows the user to select multiple files via a single input control, if you specify a value for the attribute multiple:

<input type="file" multiple>

or, in XHTML:

<input type="file" multiple="multiple" />

You might not know that Opera supported multiple file uploads for a while now, based on the earlier Web Forms 2.0 standard in a slightly different (and more flexible) format:

<input type="file" min="1" max="9999″ />
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Find the vendor prefix of the current browser

As you probably know already, when browsers implement an experimental or proprietary CSS property, they prefix it with their “vendor prefix”, so that 1) it doesn’t collide with other properties and 2) you can choose whether to use it or not in that particular browser, since it’s support might be wrong or incomplete.

When writing CSS you probably just include all properties and rest in peace, since browsers ignore properties they don’t know. However, when changing a style via javascript it’s quite a waste to do that.

Instead of iterating over all possible vendor prefixes every time to test if a prefixed version of a specific property is supported, we can create a function that returns the current browser’s prefix and caches the result, so that no redundant iterations are performed afterwards. How can we create such a function though?