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jQuery code doesn't work in CodeIgniter

I'm trying to do following with jQuery:

<head>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

    <script> 
        $('#test').hover(function(){
            alert('sub');
        });
    </script>
</head>

Thanks.

I'm assuming that HTML DOM element with id="test" exists.

<head>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

    <script>
        $(function() {
            $('#test').hover(function() {
                alert('sub');
            });
        });
    </script>
</head>

By the way, CodeIgniter has nothing to do with your issue.

Seems like you are accessing an element which does not exists.

Try this:

<head>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>

    <script>
        $(document).ready(function() {
            $('#test').hover(function() {
                alert('sub');
            });
        });
    </script>
</head>

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