From fedf3e2e6e1a86fbb7c231f685faa537f277aed5 Mon Sep 17 00:00:00 2001
From: "grafana-delivery-bot[bot]"
 <132647405+grafana-delivery-bot[bot]@users.noreply.github.com>
Date: Wed, 21 Feb 2024 18:02:06 +0000
Subject: [PATCH] [v10.4.x] Alerting: Protect possible undefined (#83186)

Alerting: Protect possible undefined (#83128)

Protect possible undefined

(cherry picked from commit 16dee3cf1c540f9cffbc1a01aa275fb15a143300)

Co-authored-by: Sonia Aguilar <33540275+soniaAguilarPeiron@users.noreply.github.com>
---
 public/app/core/components/TimelineChart/TimelineChart.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/public/app/core/components/TimelineChart/TimelineChart.tsx b/public/app/core/components/TimelineChart/TimelineChart.tsx
index 524296eefba..9fb1c4ed748 100644
--- a/public/app/core/components/TimelineChart/TimelineChart.tsx
+++ b/public/app/core/components/TimelineChart/TimelineChart.tsx
@@ -59,7 +59,7 @@ export class TimelineChart extends React.Component<TimelineProps> {
       rowHeight: alignedFrame.fields.length > 2 ? this.props.rowHeight : 1,
       getValueColor: this.getValueColor,
       // @ts-ignore
-      hoverMulti: this.props.tooltip.mode === TooltipDisplayMode.Multi,
+      hoverMulti: this.props.tooltip?.mode === TooltipDisplayMode.Multi,
     });
   };