From 679e07189ddfe66b7257a08ee752996e6963da3a Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Mon, 1 Nov 2021 20:10:52 +0000
Subject: [PATCH] Do not modify inject node props in oneditprepare Fixes #3241

---
 .../@node-red/nodes/core/common/20-inject.html       | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/packages/node_modules/@node-red/nodes/core/common/20-inject.html b/packages/node_modules/@node-red/nodes/core/common/20-inject.html
index 73dd7fe40..2cbf274ce 100644
--- a/packages/node_modules/@node-red/nodes/core/common/20-inject.html
+++ b/packages/node_modules/@node-red/nodes/core/common/20-inject.html
@@ -353,14 +353,16 @@
         },
         oneditprepare: function() {
             var node = this;
+            var payloadType = node.payloadType;
+
             if (node.payloadType == null) {
                 if (node.payload == "") {
-                    node.payloadType = "date";
+                    payloadType = "date";
                 } else {
-                    node.payloadType = "str";
+                    payloadType = "str";
                 }
             } else if (node.payloadType === 'string' || node.payloadType === 'none') {
-                node.payloadType = "str";
+                payloadType = "str";
             }
 
             $("#inject-time-type-select").on("change", function() {
@@ -557,7 +559,7 @@
                 var payload = {
                     p:'payload',
                     v: node.payload ? node.payload : '',
-                    vt:node.payloadType ? node.payloadType : 'date'
+                    vt:payloadType ? payloadType : 'date'
                 };
                 var topic = {
                     p:'topic',
@@ -573,7 +575,7 @@
                 if (newProp.v === undefined) {
                     if (prop.p === 'payload') {
                         newProp.v = node.payload ? node.payload : '';
-                        newProp.vt = node.payloadType ? node.payloadType : 'date';
+                        newProp.vt = payloadType ? payloadType : 'date';
                     } else if (prop.p === 'topic' && prop.vt === "str") {
                         newProp.v =  node.topic ? node.topic : '';
                     }