Added error handling and geolocation options

main.js

@@ -8,8 +8,10 @@ if (!'geolocation' in navigator) {
   speedDiv.innerHTML = 'No API'
 } else {
 	
-  const WID = navigator.geolocation.watchPosition( function (loc) {
-    // got speed
+  const WID = navigator.geolocation.watchPosition(
+    
+    // Success
+    function (loc) {
       if (loc.coords.speed) {
         console.log('Got speed:',loc.coords.speed)
         // convert to mph and display
@@ -17,5 +19,17 @@ if (!'geolocation' in navigator) {
       } else {
         speedDiv.innerHTML = '0.0'
       }
-  })
+    },
+    
+    // Error
+    function() {
+      console.error('Could not determine GPS position')
+    },
+    
+    // Options
+    {
+      enableHighAccuracy: true,
+    }
+    
+  )
 }