firefly-iii/resources/views/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">{{ trans('firefly.add_money_to_piggy_title', {name: piggyBank.name}) }}</h4>
        </div>
        <form style="display: inline;" id="add" action="{{ route('piggy-banks.add', piggyBank.id) }}" method="POST">
            <div class="modal-body">
                <input type="hidden" name="_token" value="{{ csrf_token() }}"/>

                <p>
                    {{ 'max_amount_add'|_ }}: {{ maxAmount|formatAmount }}.
                </p>

                <div class="input-group">
                    <div class="input-group-addon">{{ getCurrencySymbol()|raw }}</div>
                    <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>