Hi nauna,

Please refer below sample.

HTML

<link type="text/css" rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link type="text/css" rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/themes/smoothness/jquery-ui.css">
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API_Key"></script>
<script type="text/javascript">
    var geocoder;
    var map;
    function initialize() {
        var initialLat = $('.search_latitude').val();
        var initialLong = $('.search_longitude').val();
        initialLat = initialLat ? initialLat : 36.169648;
        initialLong = initialLong ? initialLong : -115.141000;
        var latlng = new google.maps.LatLng(initialLat, initialLong);
        var options = { zoom: 16, center: latlng, mapTypeId: google.maps.MapTypeId.ROADMAP };
        map = new google.maps.Map(document.getElementById("geomap"), options);
        geocoder = new google.maps.Geocoder();
        marker = new google.maps.Marker({ map: map, draggable: true, position: latlng });
        google.maps.event.addListener(marker, "dragend", function () {
            var point = marker.getPosition();
            map.panTo(point);
            geocoder.geocode({ 'latLng': marker.getPosition() }, function (results, status) {
                $("#search_location").val(results[0].formatted_address);
                if (status == google.maps.GeocoderStatus.OK) {
                    map.setCenter(results[0].geometry.location);
                    marker.setPosition(results[0].geometry.location);
                    $('.search_addr').val(results[0].formatted_address);
                    $('.search_latitude').val(marker.getPosition().lat());
                    $('.search_longitude').val(marker.getPosition().lng());
                }
            });
        });
    }
    $(document).ready(function () {
        initialize();
        var PostCodeid = '#search_location';
        $(function () {
            $(PostCodeid).autocomplete({
                source: function (request, response) {
                    geocoder.geocode({
                        'address': request.term
                    }, function (results, status) {
                        response($.map(results, function (item) {
                            return {
                                label: item.formatted_address,
                                value: item.formatted_address,
                                lat: item.geometry.location.lat(),
                                lon: item.geometry.location.lng()
                            };
                            $('#search_location').val(item.formatted_address);
                        }));
                    });
                },
                select: function (event, ui) {
                    $('.search_addr').val(ui.item.value);
                    $('.search_latitude').val(ui.item.lat);
                    $('.search_longitude').val(ui.item.lon);
                    var latlng = new google.maps.LatLng(ui.item.lat, ui.item.lon);
                    marker.setPosition(latlng);
                    initialize();
                }
            });
        });

        $('#search_location').blur(function (e) {
            debugger;
            var address = $(PostCodeid).val();
            geocoder.geocode({ 'address': address }, function (results, status) {
                if (status == google.maps.GeocoderStatus.OK) {
                    map.setCenter(results[0].geometry.location);
                    marker.setPosition(results[0].geometry.location);
                    $('.search_addr').val(results[0].formatted_address);
                    $('.search_latitude').val(marker.getPosition().lat());
                    $('.search_longitude').val(marker.getPosition().lng());
                } else {
                    alert("Geocode was not successful for the following reason: " + status);
                }
            });
        });

        google.maps.event.addListener(marker, 'drag', function () {
            geocoder.geocode({ 'latLng': marker.getPosition() }, function (results, status) {
                $("#search_location").val(results[0].formatted_address);
                if (status == google.maps.GeocoderStatus.OK) {
                    if (results[0]) {
                        debugger;
                        $('.search_addr').val(results[0].formatted_address);
                        $('.search_latitude').val(marker.getPosition().lat());
                        $('.search_longitude').val(marker.getPosition().lng());
                    }
                }
            });
        });
    });
</script>
<div class="form-group input-group" style="width: 100%">
    <input type="text" id="search_location" class="form-control" placeholder="Search location" />
</div>
<div id="geomap">
</div>

Screenshot