luisfernando-rf commented on issue #115: Frequency/Interval feature for 
`watchPosition`
URL: 
https://github.com/apache/cordova-plugin-geolocation/issues/115#issuecomment-427926084
 
 
   I did it this way, but you're looking at me in error.
   
   Error: 
   "Uncaught TypeError: Failed to execute 'watchPosition' on 'Geolocation': The 
callback provided as parameter 1 is not a function."
   
   `let watchLocation
   let locationLastUpdateTime = null
   let locationMinUpdateFrequency = 15 * 1000 
   
   this.watchLocation = 
navigator.geolocation.watchPosition({enableHighAccuracy: true})
       .filter((p) => p.coords !== undefined)
       .subscribe(position => {
           console.log('position: ', position, 'L: ', position.coords.longitude 
+ ' ' + position.coords.latitude)
           
           let now = new Date();
           let duration
           try {
               duration = now.getTime() - this.locationLastUpdateTime.getTime()
           } catch (error) {
               duration = 999999999
           }
   
           if (this.locationLastUpdateTime == null || duration >= 
this.locationMinUpdateFrequency) {
               console.log('Update is needed: ', duration)
               myLocation()
               this.locationLastUpdateTime = now;
           } else {
               console.log('Ignore position update: ', duration);
           }
       })`
   
   

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