method.js

 methods: {
    initMarker(loc) {
      this.existingPlace = loc;
    },
    addLocationMarker() {
      if (this.existingPlace) {
        const marker = {
          lat: this.existingPlace.geometry.location.lat(),
          lng: this.existingPlace.geometry.location.lng(),
        };
        this.locationMarkers.push({ position: marker });
        this.locPlaces.push(this.existingPlace);
        this.center = marker;
        this.existingPlace = null;
      }
    },
    locateGeoLocation: function () {
      navigator.geolocation.getCurrentPosition((res) => {
        this.center = {
          lat: res.coords.latitude,
          lng: res.coords.longitude,
        };
      });
    },
  },