Check if selected area is empty

First I created curves with selection of each channel separately, then I used this script from the link to check each of those four (curve) layers and it works...

It may not be the most aesthetically pleasing solution, but for me as someone who is just researching scripting, it was enough that this script cover my needs 🙂

var layer = app.activeDocument.activeLayer;
var layerName = layer.name;
if (!(layer.allLocked || layer.pixelsLocked || layer.positionLocked || layer.transparentPixelsLocked || (0 !== layer.linkedLayers.length))) { 
    if ((0 === layer.bounds[2] && (0 === layer.bounds[3]))) {
        layer.remove();
    }
    else {
////// do something
 } 
}