From c5d8f81eb15a9af8457b60758bb31c156f90857f Mon Sep 17 00:00:00 2001
From: DerZyklop <account-github@der-zyklop.de>
Date: Mon, 9 Dec 2019 19:35:25 +0100
Subject: [PATCH] Fixes MrFrankel/ngx-popper#126

Performance improvement:
Added condition to `clearTimeout(...)`, so it only runs if a timeout was started.
---
 src/popper-directive.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/popper-directive.ts b/src/popper-directive.ts
index da601fe..2467f1d 100644
--- a/src/popper-directive.ts
+++ b/src/popper-directive.ts
@@ -235,8 +235,8 @@ export class PopperController implements OnInit, OnDestroy, OnChanges {
     this.subscriptions.length = 0;
     this.clearEventListeners();
     this.clearGlobalEventListeners();
-    clearTimeout(this.scheduledShowTimeout);
-    clearTimeout(this.scheduledHideTimeout);
+    if (this.scheduledShowTimeout !== undefined) clearTimeout(this.scheduledShowTimeout);
+    if (this.scheduledHideTimeout !== undefined) clearTimeout(this.scheduledHideTimeout);
     this.popperContent && this.popperContent.clean();
   }