CSS selector for attribute names based on a wildcard

As you have pointed out, there are multiple ways to target the value of an HTML attribute.

• E[foo="bar"]

  an E element whose "foo" attribute value is exactly equal to "bar"

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• E[foo~="bar"]

  an E element whose "foo" attribute value is a list of whitespace-separated values, one of which is exactly equal to "bar"

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• E[foo^="bar"]

  an E element whose "foo" attribute value begins exactly with the string "bar"

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• E[foo$="bar"]

  an E element whose "foo" attribute value ends exactly with the string "bar"

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• E[foo*="bar"]

  an E element whose "foo" attribute value contains the substring "bar"

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• E[foo|="en"]

  an E element whose "foo" attribute has a hyphen-separated list of values beginning (from the left) with "en"

But there is only one way to target the attribute name itself:

• E[foo]

  an E element with a "foo" attribute

Hence, there are currently no methods for wildcarding attribute names:

div[data-*] { ... } /* may be useful, but doesn't exist */
div[data-^] { ... } /* may be useful, but doesn't exist */

_{source: W3C Selectors Level 3 Specification}

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From another answer to a similar question:

There is a recent thread in the [email protected] mailing list, where Simon Pieters from Opera has proposed a nice possible syntax that has got some acceptance in the thread, so there is a chance that it will become standard somewhen in the future:

x-admin-* { ... }
[data-my-*] { ... }

No, there is no wildcarding for attribute names in CSS selectors. All attribute selectors contain a specific name of an attribute.