From 46a9e365166caeffc965452f10931f7d724c8f3e Mon Sep 17 00:00:00 2001
From: Bram Kragten <mail@bramkragten.nl>
Date: Fri, 3 Dec 2021 12:53:50 +0100
Subject: [PATCH] Guard for non numeric states (#10775)
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Co-authored-by: Joakim Sørensen <joasoe@gmail.com>
---
 src/panels/lovelace/cards/hui-area-card.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/panels/lovelace/cards/hui-area-card.ts b/src/panels/lovelace/cards/hui-area-card.ts
index abe4897942..617f6336fc 100644
--- a/src/panels/lovelace/cards/hui-area-card.ts
+++ b/src/panels/lovelace/cards/hui-area-card.ts
@@ -188,7 +188,10 @@ export class HuiAreaCard
     }
     let uom;
     const values = entities.filter((entity) => {
-      if (!entity.attributes.unit_of_measurement) {
+      if (
+        !entity.attributes.unit_of_measurement ||
+        isNaN(Number(entity.state))
+      ) {
         return false;
       }
       if (!uom) {
@@ -200,7 +203,10 @@ export class HuiAreaCard
     if (!values.length) {
       return undefined;
     }
-    const sum = values.reduce((a, b) => a + Number(b.state), 0);
+    const sum = values.reduce(
+      (total, entity) => total + Number(entity.state),
+      0
+    );
     return `${formatNumber(sum / values.length, this.hass!.locale, {
       maximumFractionDigits: 1,
     })} ${uom}`;