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    :optional

    Summary

    The :optional CSS pseudo-class represents any <input> element that does not have the required attribute set on it. This allows forms to easily indicate optional fields, and to style them accordingly.

    To provide an appearance for required form fields, the :required pseudo-class may be used.

    Examples

    See :invalid for an example.

    Specifications

    Specification Status Comment
    WHATWG HTML Living Standard
    The definition of ':optional' in that specification.
    Living Standard No change.
    HTML5
    The definition of ':optional' in that specification.
    Recommendation Defines the semantic regarding HTML and constraint validation.
    Selectors Level 4
    The definition of ':optional' in that specification.
    Working Draft No change.
    CSS Basic User Interface Module Level 3
    The definition of ':optional' in that specification.
    Working Draft Defines the pseudo-class, but not the associated semantic.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support 10.0 4.0 (2) 10 10.0 5.0
    Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support ? 4.0 (2) Not supported 10.0 5.0

    See also

    Document Tags and Contributors

    Contributors to this page: Sheppy, MusikAnimal, teoli, nimbupani, kscarfone, FredB, berkerpeksag, McGurk
    Last updated by: MusikAnimal,