sheetjs/bits/59_vba.js

var CT_VBA = "application/vnd.ms-office.vbaProject";
function make_vba_xls(cfb) {
  var newcfb = CFB.utils.cfb_new({ root: "R" });
  cfb.FullPaths.forEach(function(p, i) {
    if (p.slice(-1) === "/" || !p.match(/_VBA_PROJECT_CUR/))
      return;
    var newpath = p.replace(/^[^\/]*/, "R").replace(/\/_VBA_PROJECT_CUR\u0000*/, "");
    CFB.utils.cfb_add(newcfb, newpath, cfb.FileIndex[i].content);
  });
  return CFB.write(newcfb);
}
function fill_vba_xls(cfb, vba) {
  vba.FullPaths.forEach(function(p, i) {
    if (i == 0)
      return;
    var newpath = p.replace(/^[\/]*[^\/]*[\/]/, "/_VBA_PROJECT_CUR/");
    if (newpath.slice(-1) !== "/")
      CFB.utils.cfb_add(cfb, newpath, vba.FileIndex[i].content);
  });
}
var VBAFMTS = ["xlsb", "xlsm", "xlam", "biff8", "xla"];