jQuery function not binding to newly added dom elements

javascript jquery onclick
Ralsk28 picture Ralsk28 · Jun 30, 2011 · Viewed 68.4k times · Source

Here's index.html:

<head>
  <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
  <script type="text/javascript">

    $(document).ready(function() {
      $('.btn_test').click(function() { alert('test'); });
    });

    function add(){
      $('body').append('<a href=\'javascript:;\' class=\'btn_test\'>test</a>');
    }

  </script>
</head>
<body>
  <a href="javascript:;" class="btn_test">test1</a>
  <a href="javascript:;" onclick="add()">add</a>
</body>

If I click on test1 link, it shows alert('test'), but if I click on add link then click on test, it doesn't show anything.

Could you explain it?

Answer

Moshe Katz picture Moshe Katz · Aug 14, 2012

For users coming to this question after 2011, there is a new proper way to do this:

$(document).on('click', '.btn_test', function() { alert('test'); });

This is as of jQuery 1.7.

For more information, see Direct and delegated events

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