PWA, how to wait for user to accept 'allow location'

Ionic Framework ionic-v3
1

Hi
I’m building a PWA with Google Maps Javascript API.
When loading I want to know the user location. (If the user answers Yes.)
As it is now user have to do a refresh after answer Yes… How to wait for the user to accept locationsharing?
Also, what to do if the user answers No?

ionViewDidLoad(){

     this.loadMap();

 //loading some wordpress posts
    if(!(this.posts.length > 0)){
      let loading = this.loadingCtrl.create();
      loading.present();

      this.wordpressService.getRecentPosts(this.categoryId)
      .subscribe(data => {
        for(let post of data){
          post.excerpt.rendered = post.excerpt.rendered.split('<a')[0] + "</p>";
          this.posts.push(post);
        }

      this.addMarker();
      loading.dismiss();
      });
    }

  }



loadMap(){

    this.geolocation.getCurrentPosition().then((position) => {
   
      this.currentPosition=position;
     let latLng = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);


       let mapOptions = {
         center: latLng,
         zoom: 10,
         mapTypeId: google.maps.MapTypeId.ROADMAP
       }

       this.map = new google.maps.Map(this.mapElement.nativeElement, mapOptions);
       this.map.addListener('click', (e) => {
            this.mapClick();
        });


     }, (err) => {
       console.log( err);
     });


 }

addMarker(){
   // adding markers to the map
 }