I used ignite 15.2 and I found javascript to help to client export grid data to excel file:
https://www.igniteui.com/help/using-the-javascript-excel-library?v=15.2
It's still working good.

But after upgrade to ignite v16.1, I got error "Invalid arguments" when run export, cause that :

workbook.save(function (err, data) {
  if (err) {
    alert('Error Exporting');
  }
  else {
    var blob = new Blob([data], {
      type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
      });
    saveAs(blob, "grid.xlsx");
  }
});

Only 1 argument(is a function) pass in save method, but in infragistics.excel.js(v16.1) has checking the number of argument:

save: function() {
  var n;
  if (arguments.length === 2) {
    n = 1
  } else if (arguments.length === 3) {
    n = 0
  }
  switch (n) {
    case 0:
      return this._save.apply(this, arguments);
    case 1:
      return this._save1.apply(this, arguments); 
    default:
      throw new Error("Invalid arguments")
  }
}
....

we can see n alway have value = undefined and we will get "Invalid arguments" error
How should I fix it?

https://www.igniteui.com/help/using-the-javascript-excel-library?v=16.1 (same code with v15.2)

Sorry for my poor english skill.