From 378e5098164456e01fe3118ee251f0182caa6f25 Mon Sep 17 00:00:00 2001
From: crisbeto <crisbeto@abv.bg>
Date: Sat, 1 Apr 2017 20:33:35 +0200
Subject: [PATCH] fix(compatibility): error in theme check with angular
 universal

Fixes a reference error being thrown by the theme check when using server-side rendering.

Fixes #3870.
---
 src/lib/core/compatibility/compatibility.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/core/compatibility/compatibility.ts b/src/lib/core/compatibility/compatibility.ts
index 341e5af7fdd6..faa00bcda7ae 100644
--- a/src/lib/core/compatibility/compatibility.ts
+++ b/src/lib/core/compatibility/compatibility.ts
@@ -190,7 +190,7 @@ export class CompatibilityModule {
   }
 
   private _checkTheme(): void {
-    if (this._document) {
+    if (this._document && typeof getComputedStyle === 'function') {
       const testElement = this._document.createElement('div');
 
       testElement.classList.add('mat-theme-loaded-marker');