Load layer as an selection

Question

Is it possible in Applescript or JavaScript to load a layer as an selection, the way you do manually with
pressing-and-hold the Command (PC: Ctrl) key and click on the layer's thumbnail?

Answer 1

Here is the javascript version.
function loadLayerTransparencyToSelection() {
    var desc = new ActionDescriptor();
        var ref = new ActionReference();
        ref.putProperty( charIDToTypeID('Chnl'), charIDToTypeID('fsel') );
    desc.putReference( charIDToTypeID('null'), ref );
        var ref = new ActionReference();
        ref.putEnumerated( charIDToTypeID('Chnl'), charIDToTypeID('Chnl'), charIDToTypeID('Trsp') );
    desc.putReference( charIDToTypeID('T   '), ref );
    executeAction( charIDToTypeID('setd'), desc, DialogModes.NO );