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:optional CSS pseudo-class

98.36

CSS

The `:optional` pseudo-class matches form inputs (`<input>`, `<textarea>`, `<select>`) which are not `:required`.

Further reading:

  1. Can I use page for: :optional CSS pseudo-class
  2. HTML specification for `:optional`
  3. MDN Web Docs - CSS :optional
  4. JS Bin testcase