fix(service): check whether browserLang is undefined (#1007)

cfilipponi · web-flow · commit 3e0aebbb0252 · 2020-02-05T17:09:52.000+01:00
diff --git a/projects/ngx-translate/core/src/lib/translate.service.ts b/projects/ngx-translate/core/src/lib/translate.service.ts
@@ -503,6 +503,10 @@ export class TranslateService {
     let browserLang: any = window.navigator.languages ? window.navigator.languages[0] : null;
     browserLang = browserLang || window.navigator.language || window.navigator.browserLanguage || window.navigator.userLanguage;
 
+    if (typeof browserLang === 'undefined') {
+      return undefined
+    }
+
     if (browserLang.indexOf('-') !== -1) {
       browserLang = browserLang.split('-')[0];
     }
