javascript - Google Maps generates blank grey <div> -

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i trying generate several google map elements on single page inside jquery each() function. there several .new-venue-item elements on page, , this:

<div class="new-venue-item">    <div class="image">       <div class="image">          <a href="/venue/8121_the-square-bristol-city-of-bristol" title="discover more square"><img src="http://static.weddingvenues.com/venues/200x300/wedding-image-with-logo-rectangular.jpg" class="" width="200" height="300" alt="" title="" item-prop=""></a>       </div>       <div id="map8121" class="map" data-lng="-2.6101986" data-lat="51.4590031">       </div>       <div class="overlay">          <a href="#" class="action-btn btn-wv contact-venue trackit" data-click-type="search-contact" data-venue-id="8121" data-customer-id="4038" data-id="8121">contact venue</a>          <a href="/venue/8121_the-square-bristol-city-of-bristol/" class="action-btn btn-white trackit" data-click-type="search-map" data-venue-id="8121" data-customer-id="4038">more info</a>       </div>    </div>    <div class="info">       <a href="/venue/8121_the-square-bristol-city-of-bristol" title="discover more square">the square</a>       <span class="address"><span class="address"><a href="/p-544/united-kingdom/england/city-of-bristol/bristol/" title="bristol, city of bristol">bristol</a>, <a href="/p-164/united-kingdom/england/city-of-bristol/" title="city of bristol, england">city of bristol</a></span></span>    </div> </div>

and jquery code is:

$('.new-venue-item').each(function() {      var $map = $(this).find('.map'),         lat = parsefloat($map.data('lat')),         lng = parsefloat($map.data('lng'));      // hook map:     var mapoptions = {         scrollwheel: false,         streetviewcontrol: false,         maptypecontrol: false,         pancontrol: false,         zoomcontrol: false,         draggable: false,         zoomlevel: 14,         center: {             lat: lat,             lng: lng         }     };      //new google.maps.map( document.getelementbyid('map8160'), mapoptions );      $(this).data('map', new google.maps.map($map[0], mapoptions));   });

unfortunately, generates blank map element grey background. there no errors in console, , map api being correctly included. has encountered issue before, , how might fix it?

i have put jsfiddle demonstrating problem.

in example zoomlevel needs changed zoom fixes issue.

$('.new-venue-item').each(function() {      var $map = $(this).find('.map'),         lat = parsefloat($map.data('lat')),         lng = parsefloat($map.data('lng'));      // hook map:     var mapoptions = {         scrollwheel: false,         streetviewcontrol: false,         maptypecontrol: false,         pancontrol: false,         zoomcontrol: false,         draggable: false,         zoom: 14, //changed zoomlevel         center: {             lat: lat,             lng: lng         }     };      //new google.maps.map( document.getelementbyid('map8160'), mapoptions );      $(this).data('map', new google.maps.map($map[0], mapoptions));  });

it took me while figure out


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