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JavaScript options : events at initialization

Use before_init and after_init, options to set a callback before or after collection initialization.

Those callbacks will receive the current collection as argument.

Your callback doesn't require to return something.

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This demostration is made of the following files (click to see on GitHub in a new tab):
    -     Controller/OptionsController.php
    -     Resources/views/Options/initCallbacks.html.twig

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Demo: click on the following button to initialize the collection.

Click me

Add, move, remove values and press Submit.

Value

Value

Value

Submit

Value :a

Value :b

Value :c

Code used:

    <script type="text/javascript">

        $('#demo').click(function() {
            $(this).remove();
            $('.form-collection').collection({
                before_init: function(collection) {
                    alert("As you can see, there are no buttons yet...");
                },
                after_init: function(collection) {
                    alert("Look! Now there are!!");
                }
            });
        });

    </script>