From f648317206639bc0044fa0cf63550fbf388f15ec Mon Sep 17 00:00:00 2001
From: Franck Nijhof <git@frenck.dev>
Date: Tue, 19 Apr 2022 14:28:07 +0200
Subject: [PATCH] Fix strict error handling in developer tools templates
 (#12352)

---
 src/data/ws-templates.ts                                        | 1 +
 src/panels/developer-tools/template/developer-tools-template.ts | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/data/ws-templates.ts b/src/data/ws-templates.ts
index a1c294bab7..57bfde655b 100644
--- a/src/data/ws-templates.ts
+++ b/src/data/ws-templates.ts
@@ -20,6 +20,7 @@ export const subscribeRenderTemplate = (
     entity_ids?: string | string[];
     variables?: Record<string, unknown>;
     timeout?: number;
+    strict?: boolean;
   }
 ): Promise<UnsubscribeFunc> =>
   conn.subscribeMessage((msg: RenderTemplateResult) => onChange(msg), {
diff --git a/src/panels/developer-tools/template/developer-tools-template.ts b/src/panels/developer-tools/template/developer-tools-template.ts
index 97fa25cc84..a0c91ec175 100644
--- a/src/panels/developer-tools/template/developer-tools-template.ts
+++ b/src/panels/developer-tools/template/developer-tools-template.ts
@@ -329,6 +329,7 @@ class HaPanelDevTemplate extends LitElement {
         {
           template: this._template,
           timeout: 3,
+          strict: true,
         }
       );
       await this._unsubRenderTemplate;