https://medium.com/mitchtalmadge/bulk-export-script-for-adobe-illustrator-b23a90b1cc20

Illustrator_Drawing_Exporter.jsx

#target Illustrator

/**
 * This script will export an Illustrator file into multiple sizes of multiple file types.
 * @author Mitch Talmadge ( https://MitchTalmadge.com )
 */

if (app.documents.length > 0) {
  main();
} else {
  Window.alert("Cancelled export.");
}

function main() {
  var sizes = [1024, 512, 300, 256, 150, 100, 64, 50, 32, 16];
  var document = app.activeDocument;
  var afile = document.fullName;
  var filename = afile.name.split('.')[0];

  var svgFolder = new Folder(afile.parent.fsName + "/SVG");
  if (!svgFolder.exists) {
    svgFolder.create();
  }

  var pngFolder = new Folder(afile.parent.fsName + "/PNG");
  if (!pngFolder.exists) {
    pngFolder.create();
  }

  var jpgFolder = new Folder(afile.parent.fsName + "/JPG");
  if (!jpgFolder.exists) {
    jpgFolder.create();
  }

  Window.alert("Press OK to begin exporting.");

  var size, file;

  if (svgFolder != null) {
    var options = new ExportOptionsSVG();
    options.cssProperties = SVGCSSPropertyLocation.PRESENTATIONATTRIBUTES;
    options.documentEncoding = SVGDocumentEncoding.UTF8;
    options.fontType = SVGFontType.OUTLINEFONT;
    options.fontSubsetting = SVGFontSubsetting.None;
    options.preserveEditability = false;
    options.embedRasterImages = true;

    file = new File(svgFolder.fsName + '/' + filename + ".svg");

    document.exportFile(file, ExportType.SVG, options);
  }

  if (pngFolder != null) {
    var options = new ExportOptionsPNG24();
    options.antiAliasing = false;
    options.transparency = true;
    options.artBoardClipping = true;

    for (var i = 0; i < sizes.length; i++) {
      size = sizes[i];

      file = new File(pngFolder.fsName + '/' + filename + "-" + size + "px.png");

      var scale = size / document.height;

      if (scale <= 7.76) {
        options.verticalScale = 100 * scale;
        options.horizontalScale = 100 * scale;

        document.exportFile(file, ExportType.PNG24, options);
      } else {
        Window.alert("Cannot scale to required size. Artboard too small.");
        reopenDocument(document, afile);
        return;
      }
    }
  }

  if (jpgFolder != null) {
    var options = new ExportOptionsJPEG();
    options.antiAliasing = false;
    options.qualitySetting = 100;
    options.optimization = true;
    options.artBoardClipping = true;

    for (var i = 0; i < sizes.length; i++) {
      size = sizes[i];

      file = new File(jpgFolder.fsName + '/' + filename + "-" + size + "px.jpg");

      var scale = size / document.height;

      if (scale <= 7.76) {
        options.verticalScale = 100 * scale;
        options.horizontalScale = 100 * scale;

        document.exportFile(file, ExportType.JPEG, options);
      } else {
        Window.alert("Cannot scale to required size. Artboard too small.");
        reopenDocument(document, afile);
        return;
      }
    }
  }

  Window.alert("Images have been exported!");

  reopenDocument(document, afile);
}

function reopenDocument(document, afile) {
  document.close(SaveOptions.DONOTSAVECHANGES);
  app.open(afile);
}