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For a long time it had seemed to me that life was about to begin - real life. But there was always some obstacle in the way, something to be gotten through first, some unfinished business, time still to be served, or a debt to be paid. Then life would begin. At last it dawned on me that these obstacles were my life.
Alfred D. Souza

:optional

The :optional CSS pseudo-class represents any <input>, <select>, or <textarea> element that does not have the required attribute set on it.
:optional css reference