There is an Option ean128 for Code128 to "Enable encoding CODE128 as GS1-128/EAN-128." AFAICS there is no method to use that option provided by the underlying BarcodeJS Lib.
The ean128 option was added to the underlying lib earlier this year, it seems. This component doesn't support it yet, but it shouldn't be too hard to add. I'll look into it soon.
There is an Option ean128 for Code128 to "Enable encoding CODE128 as GS1-128/EAN-128." AFAICS there is no method to use that option provided by the underlying BarcodeJS Lib.