Openlayers 3.5 and GeoJSON

Question

I'm having a problem with OpenLayers 3.5. I'm trying to use the one-off loading strategy to grab features from a GeoJSON file. I'm adding a new layer to an already instantiated map. My code looks like this:

var vectorSource = new ol.source.Vector({
  url: layerInfo.url,
  format: new ol.format.GeoJSON()
});

var pointsLayer = new ol.layer.Vector({
  source: vectorSource,
  style: styleFunc
});

that.map.addLayer(pointsLayer);
pointsLayer.setVisible(true);

However, nothing shows, and when I examine pointsLayer.getSource().getFeatures(), I discover that no features were actually loaded.

So, now I tried to load the features a different way:

var that = this;

$.get(layerInfo.url, function(response) {

  var vectorSource = new ol.source.Vector({
    features: (new ol.format.GeoJSON()).readFeatures(response)
  });

  var pointsLayer = new ol.layer.Vector({
    source: vectorSource,
    style: styleFunc
  });

  that.map.addLayer(pointsLayer);
  pointsLayer.setVisible(true);
});

This DOES work. I'm banging my head against a wall here. Does anyone have any ideas? Thanks so much!

Answer 1

This is how I'm loading the data now, "data" is my GJson

var wktTraffic = new ol.source.Vector({
});

var trafficLayer = new ol.layer.Vector({
    source: wktTraffic,
    style: new ol.style.Style({
            stroke: new ol.style.Stroke({
            color: 'blue',
            width: 5
        })
    })
});

function showData(data) {
    var format = new ol.format.WKT();
    var feature;
    $.each(data, function (i, link) {
        feature = format.readFeature(link.geom);
        wktTraffic.addFeature(feature);
    })
    console.log('done load map');
}