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  1. Mar 2021
  2. stackoverflow.com stackoverflow.com
    Detect if an input has text in it using CSS -- on a page I am visiting and do not control?
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    1. TylerRick 10 Mar 2021
      If you would like to make “empty” include values that consist of spaces only, you can add the attribute pattern=.*\S.*.
      HTML: constraint validation HTML: constraint validation: pattern
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    stackoverflow.com/questions/16952526/detect-if-an-input-has-text-in-it-using-css-on-a-page-i-am-visiting-and-do-no