CODEWITHSUNDEEP
javascriptjqueryonclick
Ralsk28
Ralsk28

Reputation: 769

jQuery function not binding to newly added dom elements

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?

Upvotes: 75

Views: 70622

Answers (13)

Salman Ashraf
Salman Ashraf

Reputation: 1

You need to add a proper button click function to give a proper result

$("#btn1").live(function() { alert("test"); });

Upvotes: 0

Amir Raminfar
Amir Raminfar

Reputation: 34179

Use Jquery live instead. Here is the help page for it http://api.jquery.com/live/

$('.btn_test').live(function() { alert('test'); });

Edit: live() is deprecated and you should use on() instead. 

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

Upvotes: 7

scrappedcola
scrappedcola

Reputation: 10572

This is because you click event is only bound to the existing element at the time of binding. You need to use live or delegate which will bind the event to existing and future elements on the page.

$('.btn_test').live("click", function() { alert('test'); });

Jquery Live

Upvotes: 3

Moshe Katz
Moshe Katz

Reputation: 16934

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

Upvotes: 214

Doug Molineux
Doug Molineux

Reputation: 12431

You need to use a "live" click listener because initially only the single element will exist.

$('.btn_test').live("click", function() { 
   alert('test'); 
});

Update: Since live is deprecated, you should use "on()":

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

http://api.jquery.com/on/

Upvotes: 34

Rahul
Rahul

Reputation: 21

After jquery 1.7 on method can be used and it really works nice 

<!DOCTYPE html>
<html>
<head>
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">
    </script>
<script>
    $(document).ready(function(){
      $("p").on("click",function(){
       alert("The paragraph was clicked.");
       $("body").append("<p id='new'>Now click on this paragraph</p>");
    });
    $(document).on("click","#new",function(){
       alert("On really works.");
      });
    });
</script>
</head>
<body>
    <p>Click this paragraph.</p>
</body>
</html>

see it in action http://jsfiddle.net/rahulchaturvedie/CzR6n/

Upvotes: 1

Umer Farooq
Umer Farooq

Reputation: 388

I have same problem like question I was just near to pulling my hair then i got the solution. I was using different syntax

$(".innerImage").on("click", function(){ 
alert("test");
});

it was not working for me (innerImage is dynamically created dom) Now I'm using 

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

http://jsfiddle.net/SDJEp/2/

thanks @Moshe Katz

Upvotes: 15

Enigmax
Enigmax

Reputation: 59

Or just run the script at the end of your page

Upvotes: 0

Karoly Horvath
Karoly Horvath

Reputation: 96346

$('.btn_test').click

will add the handler for elements which are available on the page (at this point 'test' does not exist!)

you have to either manually add a click handler for this element when you do append, or use a live event handler which will work for every element even if you create it later..

$('.btn_test').live(function() { alert('test'); });

Upvotes: 1

Neil N
Neil N

Reputation: 25278

Because the event is tied to each matching element in the document ready. Any new elements added do NOT automatically have the same events tied to them.

You will have to manually bind the event to any new element, after it is added, or use the live listener.

Upvotes: 1

shanethehat
shanethehat

Reputation: 15580

When the document loads you add event listeners to each matching class to listen for the click event on those elements. The same listener is not automatically added to elements that you add to the Dom later.

Upvotes: 1

locrizak
locrizak

Reputation: 12279

you need live listener instead of click:

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

The reason being is that the click only assigns the listener to elements when the page is loading. Any new elements added will not have this listener on them. Live adds the click listener to element when the page loads and when they are added afterwards

Upvotes: 2

CassOnMars
CassOnMars

Reputation: 6181

.click binds to what is presently visible to jQuery. You need to use .live:

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

Upvotes: 8

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