firefly-iii/resources/twig/piggy-banks/add.twig

    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
                <h4 class="modal-title" id="myModalLabel">Add money to {{ piggyBank.name }}</h4>
            </div>
            <form style="display: inline;" id="add" action="{{ route('piggy-banks.add', piggyBank.id) }}" method="POST">

            <div class="modal-body">
                <p>
                    The maximum amount you can add is {{ maxAmount|formatAmount }}.
                </p>
                <div class="input-group">
                    <div class="input-group-addon">{{ getCurrencySymbol() }}</div>
                    <input type="hidden" name="_token" value="{{ csrf_token() }}" />
                    <input step="any" class="form-control" id="amount" autocomplete="off" name="amount" max="{{ maxAmount|round(2) }}" type="number" />
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button type="submit" class="btn btn-primary">Add</button>
            </div>
            </form>
        </div>
    </div>