Exemple OL

openlayers.js

var openlayers = require('openlayers');

var moduleCarto = (function(ol) {
  
  var initMap = function()
  {
    // Couche Open Street map
    var layerOsm = new ol.layer.Tile({
      title: 'Open Street Map',
      visible: true,
      type: 'overlays',
      source: new ol.source.OSM()
    });
      
     // Create view 
    var defCoordinates = getDefaultCorrdinates();
    var view = new ol.View({
        zoom: 10,
        center: new ol.geom.Point(defCoordinates).transform('EPSG:4326', 'EPSG:3857').getCoordinates()
    });
    
    var map = new ol.Map({
        layers: [layerOsm],
        target: 'map', // ID du div HTML contenant ta carte
        view: view
    });
    
    return map;
  };

  /**
   * Return default coordinates WGS84 (cf GPS)
   */
  var getDefaultCorrdinates = function()
  {
    return [2.352222, 48.856614]
  }
  
  return {
    initMap: initMap
  };
})(openlayers);

moduleCarto.initMap();