From e014c7aff6176eec182def5151b44e5689eefde8 Mon Sep 17 00:00:00 2001
From: Bram Kragten <mail@bramkragten.nl>
Date: Fri, 4 Dec 2020 19:02:58 +0100
Subject: [PATCH] Entity is not required for button card (#7909)

Fixes https://github.com/home-assistant/frontend/issues/7908
---
 src/panels/lovelace/cards/hui-button-card.ts        | 3 ---
 src/panels/lovelace/cards/hui-entity-button-card.ts | 9 ++++++++-
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/panels/lovelace/cards/hui-button-card.ts b/src/panels/lovelace/cards/hui-button-card.ts
index 719320ebcd..ef21e4c8b7 100644
--- a/src/panels/lovelace/cards/hui-button-card.ts
+++ b/src/panels/lovelace/cards/hui-button-card.ts
@@ -84,9 +84,6 @@ export class HuiButtonCard extends LitElement implements LovelaceCard {
   }
 
   public setConfig(config: ButtonCardConfig): void {
-    if (!config.entity) {
-      throw new Error("Entity must be specified");
-    }
     if (config.entity && !isValidEntityId(config.entity)) {
       throw new Error("Invalid entity");
     }
diff --git a/src/panels/lovelace/cards/hui-entity-button-card.ts b/src/panels/lovelace/cards/hui-entity-button-card.ts
index 7955ccf040..0cb0b7eb43 100644
--- a/src/panels/lovelace/cards/hui-entity-button-card.ts
+++ b/src/panels/lovelace/cards/hui-entity-button-card.ts
@@ -2,7 +2,14 @@ import { customElement } from "lit-element";
 import { HuiButtonCard } from "./hui-button-card";
 
 @customElement("hui-entity-button-card")
-class HuiEntityButtonCard extends HuiButtonCard {}
+class HuiEntityButtonCard extends HuiButtonCard {
+  public setConfig(config): void {
+    if (!config.entity) {
+      throw new Error("Entity must be specified");
+    }
+    super.setConfig(config);
+  }
+}
 
 declare global {
   interface HTMLElementTagNameMap {