From d70767917a43fc51f854b95e1249a271d22b5eb1 Mon Sep 17 00:00:00 2001
From: Nathan Reese <reese.nathan@gmail.com>
Date: Fri, 11 Jan 2019 16:33:16 -0700
Subject: [PATCH] [kbn-number-list] avoid adding new items that are outside of
 the range (#28304)

* dont add value outside of range

* handle last being over max

* return NaN for next when list is empty
---
 src/ui/public/number_list/number_list.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/ui/public/number_list/number_list.js b/src/ui/public/number_list/number_list.js
index 0234d7230527b..1102cae032cea 100644
--- a/src/ui/public/number_list/number_list.js
+++ b/src/ui/public/number_list/number_list.js
@@ -88,7 +88,22 @@ uiModules
             const list = self.getList();
             if (!list) return;
 
-            list.push(_.last(list) + 1);
+            function getNext() {
+              if (list.length === 0) {
+                // returning NaN adds an empty input
+                return NaN;
+              }
+
+              const next = _.last(list) + 1;
+              if (next < self.range.max) {
+                return next;
+              }
+
+              return self.range.max - 1;
+            }
+
+            const next = getNext();
+            list.push(next);
           };
 
           /**