using indesign menu select all then object pathfinder intersect using script

I am trying to use the subtract option with two objects. My current script code is:

function main(){
var mySelections = app.selection;
var bottomObject = mySelections[0];
var cutLine = mySelections[1];
var topObject = bottomObject.duplicate();
var topPath = topObject && cutLine;
}
 

Which works to duplicate the bottom object but now i need to use the subtract pathfinder option for the topObject and cutLine (topPath). I am trying to script a solution for my post in https://creativepro.com/topic/cut-photo-in-half-along-curved-path

I tried using your bit of code in my script changing a few things to topPath[0].subtractPath(topPath); but it didn’t work.
maybe you can once again improve upon my idea =).

Skemicle, the ‘and’ operator (‘&&’) is an equality operator, not an assignment operator.

This script should work:

app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, "Subtract Paths");
function main() {
    try{
        var mySelection = app.selection;
        var myPicture = mySelection[0];
        var myPath = mySelection[1];
        var topPicture = myPicture.duplicate();
        var half1 = myPath.subtractPath(myPicture);
        var newPath = half1.duplicate();
        var half2 = newPath.subtractPath(topPicture);
        var myGroup = half1.parent.groups.add ([half1, half2]);
        app.select(myGroup);
        } catch(myError) {
            alert("Make sure you selected 2 path items")
            }
        }