From a20906bc125c4b0a65bad3990090369a4f9855b0 Mon Sep 17 00:00:00 2001
From: "nicolas.dorier" <nicolas.dorier@gmail.com>
Date: Thu, 12 Aug 2021 10:04:23 +0900
Subject: [PATCH] Fix paybutton like when no amount set

---
 BTCPayServer/wwwroot/paybutton/paybutton.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/BTCPayServer/wwwroot/paybutton/paybutton.js b/BTCPayServer/wwwroot/paybutton/paybutton.js
index ffab19815..f1ee81a85 100644
--- a/BTCPayServer/wwwroot/paybutton/paybutton.js
+++ b/BTCPayServer/wwwroot/paybutton/paybutton.js
@@ -148,7 +148,7 @@ function inputChanges(event, buttonSize) {
 
     // Fixed amount: Add price and currency as hidden inputs
     if (isFixedAmount) {
-        if (srvModel.price !== '')
+        if (srvModel.price)
             html += addInput(priceInputName, srvModel.price);
         if(allowCurrencySelection){
             html += addInput("currency", srvModel.currency);
@@ -158,7 +158,8 @@ function inputChanges(event, buttonSize) {
     else if (isCustomAmount) {
         html += '  <div class="btcpay-custom-container">\n    <div class="btcpay-custom">\n';
         html += srvModel.simpleInput ? '' : addPlusMinusButton("-", srvModel.step, srvModel.min, srvModel.max);
-        html += '  ' + addInputPrice(priceInputName, srvModel.price, widthInput, "",   "number", srvModel.min, srvModel.max, srvModel.step);
+        if (srvModel.price)
+            html += '  ' + addInputPrice(priceInputName, srvModel.price, widthInput, "",   "number", srvModel.min, srvModel.max, srvModel.step);
         html += srvModel.simpleInput ? '' : addPlusMinusButton("+", srvModel.step, srvModel.min, srvModel.max);
         html += '    </div>\n';
         if(allowCurrencySelection) {
@@ -198,7 +199,7 @@ function inputChanges(event, buttonSize) {
     var url =  new URL(form.getAttribute("action"));
     var formData =   new FormData(form);
     formData.forEach((value, key) => {
-        if(key !== "jsonResponse"){
+        if (key !== "jsonResponse") {
             url.searchParams.append(key, value);
         }
     });