Is it possible to select elements in CSS by their HTML5 data attributes (for example, data-role)?
Answer
If you mean using an attribute selector, sure, why not:
[data-role="page"] {
/* Styles */
}
There are a variety of attribute selectors you can use for various scenarios which are all covered in the document I link to. Note that, despite custom data attributes being a "new HTML5 feature",
browsers typically don't have any problems supporting non-standard attributes, so you should be able to filter them with attribute selectors; and
you don't have to worry about CSS validation either, as CSS doesn't care about non-namespaced attribute names as long as they don't break the selector syntax.
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