Edit in JSFiddle

 var map = new ol.Map({
   target: 'map',
   layers: [
     new ol.layer.Tile({
       source: new ol.source.MapQuest({
         layer: 'sat'
       })
     })
   ],
   view: new ol.View({
     center: ol.proj.fromLonLat([2.424, 48.845]),
     zoom: 10
   })
 });

<div id="map" class="map"></div>

.map {
  height: 400px;
  width: 100%;
  border: solid;
}