StyleFunction Openlayers-3 - multiple callback variables?

Question

I am using the "styleFunction" from the following example: http://openlayers.org/en/v3.9.0/examples/geojson.html

var styleFunction = function(feature, resolution){
    var properties = feature.getProperties();
    var type = feature.getGeometry().getType();
    switch (type) {
        case 'Point':
        ...return some styling...
        break;
        case 'Polygon':
        ...return some styling...
        break;
    }
}   

I am currently using only the "feature" from the callback. I can't seem to find documentation about this function on Openlayers.org so I ask here:

Are there more variables available for callback and is there a way to find out without documentation?

(I need to know the layer name the function is styling, and I can't get that from the feature alone.)

Answer 1

No, no more variables on callback. To solve your question just store the layer name on feature and then get it back on callback.

//before you add ol.Feature to ol.source.Vector
feature.set('layer-name', layerName);

Get it back on styleFunction:

feature.get('layer-name');