Preparation code

<script src="//ajax.googleapis.com/ajax/libs/prototype/1/prototype.js"></script>
<div id='foo'>foo</div>
<div id='bar'>bar</div><script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script>
  var foo = $('#foo').hide(),
      bar = $('#bar');
  
  $.fn.isVisible = function() {
   return $.expr.filters.visible(this[0]);
  };
</script>

Preparation code output

Test runner

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!foo.is(':hidden');
!bar.is(':hidden');

foo.isVisible();
bar.isVisible();

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Sam Korn on 14th April 2011
• Revision 2: published on 28th December 2012

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