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A comment on CSS Vocabulary.

Re:CSS Vocabulary by nnq on Thursday April 17, 2014 @02:01AM (#7602183)
Why do they use `::before` instead of `:before`? Is that a typo?
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Re:CSS Vocabulary by agr8man on Thursday April 17, 2014 @02:20AM (#7602225)
The double-colon notation is introduced in order to establish a discrimination between pseudo-classes and pseudo-elements.

Doesn't work with IE.

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Re:CSS Vocabulary by windsurfer on Thursday April 17, 2014 @02:34AM (#7602257)
> Doesn't work with IE

That's not true. IE has supported it since IE9 at least. http://msdn.microsoft.com/en-us/library/ie/cc304078%28v=vs.8...

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Re:CSS Vocabulary by bzbarsky on Thursday April 17, 2014 @11:40AM (#7604269)
Pseudo-elements use two colons. A small number ("before", "after", "first-line", "first-letter") are grandfathered in as allowing either one or two, for backwards compat back to the days when there was no distinction between pseudo-elements and pseudo-classes in CSS.
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