unable to cope with the asynchronous nature of navigator.geolocation

by

You can use Promise:

var lat,lon;
var promise1 = new Promise(function(resolve, reject) {
    navigator.geolocation.getCurrentPosition(function(pos){
        lat = pos.coords.latitude
        lon = pos.coords.longitude
        resolve({lat,lon});
    }) 
})

promise1.then(function(value) {
      console.log(value.lat,value.lon)  
});

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