How to Script Adding An Empty, White Layer + Merging X Number of Layers into normal Raster layer

// 2019, use it at your own risk;

#target photoshop

if (app.documents.length > 0) {

var myDoc = app.activeDocument;

myDoc.activeLayer = myDoc.backgroundLayer;

var aLayer = myDoc.artLayers.add();

aLayer.name = myDoc.name;

try {myDoc.backgroundLayer.remove()} catch (e) {};

try {myDoc.mergeVisibleLayers()} catch (e) {};

deleteHiddenLayers ();

resetForeAndBackground();

var anotherLayer = myDoc.artLayers.add();

anotherLayer.isBackgroundLayer = true

};

////// delete hidden layers //////

function deleteHiddenLayers () {

try {

// =======================================================

var desc3 = new ActionDescriptor();

var ref2 = new ActionReference();

ref2.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), stringIDToTypeID( "hidden" ) );

desc3.putReference( charIDToTypeID( "null" ), ref2 );

executeAction( charIDToTypeID( "Dlt " ), desc3, DialogModes.NO );

} catch (e) {}

};

////// reset fore- and background color //////

function resetForeAndBackground () {

// =======================================================

var desc2 = new ActionDescriptor();

var ref1 = new ActionReference();

ref1.putProperty( charIDToTypeID( "Clr " ), charIDToTypeID( "Clrs" ) );

desc2.putReference( charIDToTypeID( "null" ), ref1 );

executeAction( charIDToTypeID( "Rset" ), desc2, DialogModes.NO );

};

Edit:

If you want to give it a try, save the above text as a new txt-file with the extension jsx into Photoshop’s Presets/Scripts-folder.

After restarting Photoshop the Script should be available under File > Scripts and can be assigned a Keyboard Shortcut directly and recorded into an Action.