小编All*_*lez的帖子

$(document).ready(function() {
  
  var $result = $('#result');
  
  if(true instanceof Boolean) {
    $result.append('I\'m a Boolean!');
  } else {
    $result.append('I\'m something other than a Boolean!');
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div id="result"></div>