From 106950533c33ee539f8852cad67bf290cf02973e Mon Sep 17 00:00:00 2001
From: Brian Soumakian <bsoumakian@gmail.com>
Date: Thu, 31 Aug 2017 10:31:14 -0700
Subject: [PATCH] fix(navigation): ensure secondaryId always has a string value
 (#12641)

---
 src/components/tabs/tabs.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/components/tabs/tabs.ts b/src/components/tabs/tabs.ts
index 302432d1e62..1ec729995e5 100644
--- a/src/components/tabs/tabs.ts
+++ b/src/components/tabs/tabs.ts
@@ -642,7 +642,7 @@ export class Tabs extends Ion implements AfterViewInit, RootNode, ITabs, Navigat
   /**
    * @private
    */
-  _getSelectedTabIndex(secondaryId: string, fallbackIndex: number = 0): number {
+  _getSelectedTabIndex(secondaryId: string = '', fallbackIndex: number = 0): number {
     // we found a segment which probably represents which tab to select
     const indexMatch = secondaryId.match(/tab-(\d+)/);
     if (indexMatch) {