From 874e77464ce435ca488dfbc66042071a6c4d7f2c Mon Sep 17 00:00:00 2001
From: Rahul singh mawari <51601150+sudoStatus200@users.noreply.github.com>
Date: Fri, 25 Oct 2019 23:11:44 +0530
Subject: [PATCH] fixed issue 192:fixed geolocate control bug (#914)

---
 src/components/geolocate-control.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/components/geolocate-control.js b/src/components/geolocate-control.js
index 4ffd59ad..ab90f75b 100644
--- a/src/components/geolocate-control.js
+++ b/src/components/geolocate-control.js
@@ -110,10 +110,12 @@ export default class GeolocateControl extends BaseControl<
   componentWillUnmount() {
     // re-implement MapboxGeolocateControl's _onRemove
     // clear the geolocation watch if exists
-    const geolocationWatchID = this._mapboxGeolocateControl._geolocationWatchID;
-    if (geolocationWatchID !== undefined) {
-      window.navigator.geolocation.clearWatch(geolocationWatchID);
-      this._mapboxGeolocateControl._geolocationWatchID = undefined;
+    if (this._mapboxGeolocateControl) {
+      const geolocationWatchID = this._mapboxGeolocateControl._geolocationWatchID;
+      if (geolocationWatchID !== undefined) {
+        window.navigator.geolocation.clearWatch(geolocationWatchID);
+        this._mapboxGeolocateControl._geolocationWatchID = undefined;
+      }
     }
   }