Objective

Get latitude and longitude from a Google Address when an user type in an input form

HTML

<form method="post">
    <input id="place" name="place" type="text" placeholder="Address">
    <input id="lat" name="lat" type="hidden" value="">
    <input id="lng" name="lng" type="hidden" value="">
 
     <input id="submit-search" type="submit" value="Send">
</form>
 
<!-- call Google Maps javascript files, note libraries=places and language -->
<script type="text/javascript" src="//maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=places&language=es_ES"></script>

Javascript

<script>
var input = (document.getElementById('place'));
var searchBox = new google.maps.places.SearchBox((input));
var places;
 
google.maps.event.addListener(searchBox, 'places_changed', function() {
    places = searchBox.getPlaces();
 
    // if Google returns something, assign latitude and longitude
    if (places[0]) {
        $('#lat').val(places[0].geometry.location.lat());
        $('#lng').val(places[0].geometry.location.lng());
    }
});
 
// avoid submit by return key
$("#place").on("keypress", function(e) {
    if (e.keyCode === 13) return false;
});
</script>