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Javascript DOM - 如何get by tag name vs get by id...

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我们想知道如何get by tag name vs get by id。...



<html>
  <head>
    <script type="text/javascript" src='http://code.jquery.com/jquery-1.5.2.js'></script>
    <script type="text/javascript">
        $(document).ready(function(){
           console.log($("p").contents() );
           console.log($("p").contents().text());
        });
    </script>
  </head>
  <body>
        <p>Hello <span>span</span>data</p>

  </body>
</html>