btcpayserver/BTCPayServer/Views/Invoice/CreateInvoice.cshtml

@model BTCPayServer.Models.InvoicingModels.CreateInvoiceModel
@{
    ViewData.SetActivePageAndTitle(InvoiceNavPages.Create, "Create an invoice");
}

@section PageFootContent {
    <partial name="_ValidationScriptsPartial" />
    <script>
        document.addEventListener("DOMContentLoaded", function () {
            $("#create-invoice-form").on("submit", function() {
                $(this).find("input[type='submit']").prop('disabled', true);
            });

            $("#create-invoice-form input").on("input", function () {
                // Give it a timeout to make sure all form validation has completed by the time we run our callback
                setTimeout(function() {
                    var validationErrors = $('.field-validation-error');
                    if (validationErrors.length === 0) {
                        $("input[type='submit']#Create").removeAttr('disabled');
                    }
                }, 100);
            });
        });
    </script>
}

<section>
    <div class="container">
        <partial name="_StatusMessage" />

        <h2 class="mb-4">@ViewData["Title"]</h2>

        <div class="row">
            <div class="col-lg-12">
                <form asp-action="CreateInvoice" method="post" id="create-invoice-form">
                    <div asp-validation-summary="ModelOnly" class="text-danger"></div>
                    <div class="form-group">
                        <label asp-for="Amount" class="form-label"></label>
                        <input asp-for="Amount" class="form-control" />
                        <span asp-validation-for="Amount" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="Currency" class="form-label" data-required></label>
                        <input asp-for="Currency" class="form-control" required />
                        <span asp-validation-for="Currency" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="OrderId" class="form-label"></label>
                        <input asp-for="OrderId" class="form-control" />
                        <span asp-validation-for="OrderId" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="ItemDesc" class="form-label"></label>
                        <input asp-for="ItemDesc" class="form-control" />
                        <span asp-validation-for="ItemDesc" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="PosData" class="form-label"></label>
                        <input asp-for="PosData" class="form-control" />
                        <span asp-validation-for="PosData" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="BuyerEmail" class="form-label"></label>
                        <input asp-for="BuyerEmail" class="form-control" />
                        <span asp-validation-for="BuyerEmail" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="NotificationUrl" class="form-label"></label>
                        <input asp-for="NotificationUrl" class="form-control" />
                        <span asp-validation-for="NotificationUrl" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="StoreId" class="form-label"></label>
                        <select asp-for="StoreId" asp-items="Model.Stores" class="form-select"></select>
                        <span asp-validation-for="StoreId" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="SupportedTransactionCurrencies" class="form-label"></label>
                        <select asp-for="SupportedTransactionCurrencies" asp-items="Model.AvailablePaymentMethods" class="form-select" multiple="multiple"></select>
                        <span asp-validation-for="SupportedTransactionCurrencies" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="DefaultPaymentMethod" class="form-label"></label>
                        <select asp-for="DefaultPaymentMethod" asp-items="Model.AvailablePaymentMethods" class="form-select"></select>
                        <span asp-validation-for="DefaultPaymentMethod" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <label asp-for="NotificationEmail" class="form-label"></label>
                        <input asp-for="NotificationEmail" class="form-control" />
                        <span asp-validation-for="NotificationEmail" class="text-danger"></span>
                    </div>
                    <div class="form-group">
                        <input type="submit" value="Create" class="btn btn-primary" id="Create" />
                        <a asp-action="ListInvoices" class="text-muted ms-3">Back to list</a>
                    </div>
                </form>
            </div>
        </div>
    </div>
</section>