Simple click event

HTML

<input id="pac-input" class="controls" type="text" placeholder="Search Box">
<div id="map"></div>
 <!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBZbI5EJHVyNPd07tdhGgIODBpuqCePlIw&libraries=places&callback=initAutocomplete">
</script>

CSS

/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */
#map {
  height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

function initAutocomplete() {      
                        var myOptions = {
                            zoom: 15,
                            mapTypeId: google.maps.MapTypeId.ROADMAP,
                            mapTypeControl: false
                        }                       
                        
                        var map;
                        var marker;
                        var geocoder = new google.maps.Geocoder();
                        var address = document.getElementById('pac-input').value;
                        var infowindow = new google.maps.InfoWindow();                                              
                        
                        geocoder.geocode( { address: address}, function(results, status) {
                            if (status == google.maps.GeocoderStatus.OK && results.length) {
                                if (status != google.maps.GeocoderStatus.ZERO_RESULTS) {
                                    
                                    //create map
                                    map = new google.maps.Map(document.getElementById("map"), myOptions);

                                    //center map
                                    map.setCenter(results[0].geometry.location);
                                    
                                    //create marker
                                    marker = new google.maps.Marker({
                                        position: results[0].geometry.location,
                                        map: map,
                                        title: document.getElementById('pac-input').value,
                                    });                                                                       
                                    
                                    // Create the search box and link it to the UI element.
                                    var input = document.getElementById('pac-input');
                         ...