From 15b732dbffd8bbde6e7c63fb04ac14fdf4701cf4 Mon Sep 17 00:00:00 2001
From: Maschga <88616799+Maschga@users.noreply.github.com>
Date: Wed, 19 Nov 2025 22:54:09 +0100
Subject: [PATCH] fix: forecast default to empty array (#25177)

---
 assets/js/components/Forecast/Chart.vue | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/assets/js/components/Forecast/Chart.vue b/assets/js/components/Forecast/Chart.vue
index 50f21e81f..24b91a002 100644
--- a/assets/js/components/Forecast/Chart.vue
+++ b/assets/js/components/Forecast/Chart.vue
@@ -163,7 +163,7 @@ export default defineComponent({
 					order: active ? 0 : 1,
 				});
 			}
-			if (this.gridSlots.length > 0) {
+			if (this.gridSlots && this.gridSlots.length > 0) {
 				const active = this.selected === ForecastType.Price;
 				const color = active ? colors.price : colors.border;
 				datasets.push({
@@ -184,7 +184,7 @@ export default defineComponent({
 					order: active ? 0 : 1,
 				});
 			}
-			if (this.co2Slots.length > 0) {
+			if (this.co2Slots && this.co2Slots.length > 0) {
 				const active = this.selected === ForecastType.Co2;
 				const color = active ? colors.co2 : colors.border;
 				datasets.push({
@@ -427,6 +427,10 @@ export default defineComponent({
 			this.startDate = now;
 		},
 		filterSlots(slots: ForecastSlot[] = []) {
+			if (!slots) {
+				return undefined;
+			}
+
 			return slots.filter(
 				(slot) =>
 					new Date(slot.end) >= this.startDate && new Date(slot.start) <= this.endDate