Copy base64 data of all selected Photoshop layers into clipboard

psLayersToBase64.js

init();

funtion init() {
  var layerID, pngPath, pngFile, pngData64, pngBase64Image;
  
  layerID = app.activeDocument.activeLayer.id;
  
  pngPath = new File(Folder.temp + "/" + layerID).fsName;

  writeLayerPNGfile(pngPath);

  pngFile = new File(pngPath + ".base64");
  pngFile.open('r');
  pngFile.encoding = "UTF-8";

  pngData64 = pngFile.read();

  pngFile.close();
  pngFile.remove();

  pngBase64Image = "data:img/png;base64," + pngData64;

  copyTextToClipboard(pngBase64Image);
};

function writeLayerPNGfile(path) {
  var desc = new ActionDescriptor();
  desc.putBoolean(stringIDToTypeID("selectedLayers"), true); // Get data from all selected layers
  desc.putString(stringIDToTypeID("rawPixmapFilePath"), path); // Path to file
  desc.putBoolean(stringIDToTypeID("bounds"), true);
  desc.putInteger(stringIDToTypeID("width"), 10000); // Max size in pixels
  desc.putInteger(stringIDToTypeID("height"), 10000);
  desc.putInteger(stringIDToTypeID("format"), 2); // raw pixels (Don't touch this!)
  executeAction(stringIDToTypeID("sendLayerThumbnailToNetworkClient"), desc, DialogModes.NO);
}

function copyTextToClipboard(text, tag) {
  var strDesc = new ActionDescriptor();
  strDesc.putString(charIDToTypeID('TxtD'), text);
  executeAction(stringIDToTypeID("textToClipboard"), strDesc, DialogModes.NO);
}