Bootstrap指示关闭图标

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = /bootstrap/css/bootstrap.min.css rel = stylesheet>
      <script src = /scripts/jquery.min.js></script>
      <script src = /bootstrap/js/bootstrap.min.js></script>
   </head>
   <body>
      <div style = width:600px;background-color:orange;>
         <span>Here's the close icon</span>
         <button type = button class = close><span aria-hidden = true>&times;</span>
            <span class=sr-only>
               Close icon
            </span>
         </button>
      </div>
   </body>
</html>

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