Select / Deselect all checkboxes using jQuery

Select / Deselect all checkboxes using jQuery 
<!DOCTYPE html>
<html>
<head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Select / Deselect all checkboxes using jQuery</title>

</head>
<body>
<ul class="main">
    <li><input type="checkbox" id="select_all" /> Select all</li>
    <ul>
        <li><input type="checkbox" class="checkbox" value="1"/>Item 1</li>
        <li><input type="checkbox" class="checkbox" value="2"/>Item 2</li>
        <li><input type="checkbox" class="checkbox" value="3"/>Item 3</li>
        <li><input type="checkbox" class="checkbox" value="4"/>Item 4</li>
        <li><input type="checkbox" class="checkbox" value="5"/>Item 5</li>
    </ul>
</ul>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $('#select_all').on('click',function(){
        if(this.checked){
            $('.checkbox').each(function(){
                this.checked = true;
            });
        }else{
             $('.checkbox').each(function(){
                this.checked = false;
            });
        }
    });
    
    $('.checkbox').on('click',function(){
        if($('.checkbox:checked').length == $('.checkbox').length){
            $('#select_all').prop('checked',true);
        }else{
            $('#select_all').prop('checked',false);
        }
    });
});
</script>
</body>
</html>

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