Load group layer in OpenLayers 3

Question

I'm using OpenLayers 3 and i need to load a Geoserver group-layer

In OL2 i used a code like this and it worked:

var layer_group = new OpenLayers.Layer.WMS(
        "Sample Layer Group",
        "http://localhost:8081/geoserver/wms",
        {layers: "layer_group_name", transparent: true},
        {isBaseLayer: false, visibility: false}
    );
    map.addLayers([layer_group]);

I have no idea how OL3 loads a group.. simple layers he can load correctly

Answer 1

OL3 API is changed. You could check examples.

Explore this one.

var layers = [
  new ol.layer.Tile({
    source: new ol.source.MapQuest({layer: 'sat'})
  }),
  new ol.layer.Image({
    source: new ol.source.ImageWMS({
      url: 'http://demo.opengeo.org/geoserver/wms',
      params: {'LAYERS': 'topp:states'},
      serverType: 'geoserver',
      extent: [-13884991, 2870341, -7455066, 6338219]
    })
  })
];
var map = new ol.Map({
  layers: layers,
  target: 'map',
  view: new ol.View2D({
    center: [-10997148, 4569099],
    zoom: 4
  })
});