From 692edfc4ac4fb0b281d254a318632cb23d56f92b Mon Sep 17 00:00:00 2001
From: tomastrajan <tomas.trajan@gmail.com>
Date: Thu, 24 May 2018 19:46:00 +0800
Subject: [PATCH] fix(app): only remove existing theme classes

---
 src/app/app.component.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index e975c8248..94d2ceb62 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -95,7 +95,9 @@ export class AppComponent implements OnInit, OnDestroy {
     const toRemove = Array.from(classList).filter((item: string) =>
       item.includes('-theme')
     );
-    classList.remove(...toRemove);
+    if (toRemove.length) {
+      classList.remove(...toRemove);
+    }
     classList.add(effectiveTheme);
   }