Calling a function on Bootstrap modal open

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I used to use jQuery UI’s dialog, and it had the open option, where you can specify some Javascript code to execute once the dialog is opened. I would have used that option to select the text within the dialog using a function I have.

Now I want to do that using bootstrap’s modal. Below is the HTMl code:

<div id="code" class="modal hide fade">
    <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
        <h3>Modal header</h3>
    </div>
    <div class="modal-body">
        <pre>
print 'Hello World'

And as for the button that opens the modal:

 <a href="#code" data-toggle="modal" class="btn code-dialog">Display code</a>

I tried to use an onclick listener of the button, but the alert message was displayed before the modal appeared:

$( ".code-dialog" ).click(function(){
    alert("I want this to appear after the modal has opened!");
});

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