Hi nauna,

Refer below code.

HTML

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API_Key"></script>
<script type="text/javascript">
    function ViewCoOrdinate() {
        if (navigator.geolocation) {
            navigator.geolocation.getCurrentPosition(function (p) {
                var LatLng = new google.maps.LatLng(p.coords.latitude, p.coords.longitude);
                var geocoder = geocoder = new google.maps.Geocoder();
                geocoder.geocode({ 'latLng': LatLng }, function (results, status) {
                    if (status == google.maps.GeocoderStatus.OK) {
                        if (results[1]) {
                            document.getElementById("txtLocation").value = results[1].formatted_address;
                        }
                    }  
                });
            });          
        } else {
            alert('Geo Location feature is not supported in this browser.');
        }
  
        return false;
    }
</script>
<input type="text" id="txtLocation" />
<input type="button" id="btnView" value="View" onclintclick="return ViewCoOrdinate()" />