HTML and CSS Reference
In-Depth Information
USING HTML5 TODAY
As you've seen, HTML5 is an odd mix. At the same time
that it revives (and standardizes) some of the old laissez-
faire rules of HTML, it also introduces bleeding-edge
features that won't work in anything but the newest
browsers around.
As far as browser compatibility is concerned, you can
think of HTML5 features in three categories:
Features that already work . This includes features that
are well supported but weren't an official part of
HTML in the past (like drag-and-drop). It also in-
cludes features that can work on older browsers with
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