Modifying JSX script to save all images in folder as transparent PNG-24?

Question

So the below script simply loops through a chosen folder, checks canvas size and dimensions and sets them if they're not in a 1:1 aspect ratio, and if they are, leaves them alone. The result is all images in the folder saved in 1:1 aspect ratio at dimension of 1000 x 1000 px.

The problem is they're all saved as .JPG whereas I would prefer to save them as transparent PNG-24.

I assume somewhere in the doc.save() method there is a parameter for different file types? I cannot find any documentation on this and was wondering if someone more knowledgeable knew? Thank you!

var inputFolder = Folder.selectDialog("Select a folder to process"),
      fileList = inputFolder.getFiles(/\.(jpg|tif|psd|crw|cr2|nef|dcr|dc2|raw)$/i);

for(var i=0; i < fileList.length; i++) {
    var doc = open(fileList[i]);
    if(doc.width !== doc.height) {
        if(doc.width > doc.height) {
            doc.resizeCanvas(doc.width, doc.width)
        } else {
            doc.resizeCanvas(doc.height, doc.height)
        }
    }
    if((doc.width && doc.height) > 1000) {
        doc.resizeImage(1000, 1000);
    } else {
        doc.resizeImage(doc.width, doc.height);
    }

    doc.save();
    doc.close();
}

Answer 1

Here is the modified code

As per another answer, All you had to do was using "Save For Web" instead of save.

var inputFolder = Folder.selectDialog("Select a folder to process"),
      fileList = inputFolder.getFiles(/\.(jpg|tif|psd|crw|cr2|nef|dcr|dc2|raw)$/i);

for(var i=0; i < fileList.length; i++) {
    var doc = open(fileList[i]);
    if(doc.width !== doc.height) {
        if(doc.width > doc.height) {
            doc.resizeCanvas(doc.width, doc.width)
        } else {
            doc.resizeCanvas(doc.height, doc.height)
        }
    }
    if((doc.width && doc.height) > 1000) {
        doc.resizeImage(1000, 1000);
    } else {
        doc.resizeImage(doc.width, doc.height);
    }
    var fpath = fileList[i].path;
    var saveFile = new File (fpath);
    var pngSaveOptions = new ExportOptionsSaveForWeb();
    pngSaveOptions.format = SaveDocumentType.PNG;
    pngSaveOptions.PNG8 = false;
    pngSaveOptions.interlaced = false;
    app.activeDocument.exportDocument(saveFile, ExportType.SAVEFORWEB, pngSaveOptions);
    doc.close(SaveOptions.DONOTSAVECHANGES);
}

Answer 2

You’d need either ‘Save As’ Or ‘Save for Web’ with options parameters in your script.

Here is a thread discussing same thing. I can only point you in right direction but can’t modify your code right now.