Quick start

1. Add “fake_formset” to your INSTALLED_APPS setting like this:

   INSTALLED_APPS = (
       ...
       'fake_formset',
   )

2. Add static files css/js:

   <link type="text/css" rel="stylesheet" href="{% static 'fake_formset/css/fake_formset.css' %}">
   <script src="{% static 'fake_formset/js/fake_formset.js' %}"></script>

3. Setup form field, wrap field into following containers:

   <div class="fake-formset-field-group-container js-fake-formset_field_group_container">
       <div class="fake-formset-field_wrapper js-fake_formset_field_wrapper">
           {{ form.my_field }}
       </div>
   </div>

4. In form setup field like this:

   'my_field': forms.TextInput(attrs={
       'data-fake-formset-id': 'my_field',      - unique identifier
       'data-fake-formset-max-fields': 3,       - fake field max number
       'data-fake-formset-split-symbol': '-/'   - split symbol for storing value in database (1-/2-/3-/), "," by default.
   })

5. Setup js-handler:

   const fake_formset = new FakeFormset();
   fake_formset.add_button_text = 'Add row';
   fake_formset.delete_button_text = 'Remove';
   fake_formset.initSignals();
   
   $(document).on('fake-formset:fake-field:added', function (event, fake_field, field, formset_id) {
       if (formset_id === 'my_field') {
           fake_field.mask('+7 (999) 999-99-99');  - here you can bind other handlers.
       }
   })
   $(document).on('fake-formset:fake-field:deleted', function (event, base_field) {
       // callback on field delete.
   })
   $(document).on('fake-formset:target-field:recalculated', function (event, field) {
       // callback after base hidden field recalculating.
   })

Example: