From b1488620b1d8fd363585719505415a6379acd25b Mon Sep 17 00:00:00 2001
From: rcourtman <courtmanr@gmail.com>
Date: Wed, 5 Nov 2025 19:37:16 +0000
Subject: [PATCH] Fix Docker container prefix textarea not accepting newlines

Added explicit onKeyDown handler to stop event propagation when Enter
is pressed in the ignored container prefixes textarea. This ensures
newlines can be properly entered to separate multiple prefixes.

Related to #625
---
 frontend-modern/src/components/Alerts/ThresholdsTable.tsx | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/frontend-modern/src/components/Alerts/ThresholdsTable.tsx b/frontend-modern/src/components/Alerts/ThresholdsTable.tsx
index 4f273a6..ad955d7 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTable.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTable.tsx
@@ -2769,6 +2769,13 @@ const cancelEdit = () => {
     <textarea
       value={dockerIgnoredInput()}
       onInput={(event) => handleDockerIgnoredChange(event.currentTarget.value)}
+      onKeyDown={(event) => {
+        // Ensure Enter key works in textarea for creating new lines
+        if (event.key === 'Enter') {
+          // Don't prevent default - allow the newline to be inserted
+          event.stopPropagation();
+        }
+      }}
       placeholder="runner-"
       rows={4}
       class="mt-4 w-full rounded-md border border-gray-300 bg-white p-3 text-sm text-gray-900 shadow-sm focus:border-sky-500 focus:outline-none focus:ring-2 focus:ring-sky-200 dark:border-gray-700 dark:bg-gray-800 dark:text-gray-100 dark:focus:border-sky-400 dark:focus:ring-sky-600/40"