Please read the barcode specification carefully.
If you input an invalid data for the specific barcode type, there won’t be barcode generated, and no errors report.
For example, EAN-13 only takes 13 digits, you can’t input letters or more than 13 digits.
Supported barcodes:
CODE128
CODE128 (automatic mode switching)
CODE128 A/B/C (force mode)
EAN
EAN-13
EAN-8
EAN-5
EAN-2
UPC (A)
UPC (E)
CODE39
ITF
ITF
ITF-14
MSI
MSI10
MSI11
MSI1010
MSI1110
Pharmacode
Codabar
QR code
If you want to add styles (color, margin, font, background, etc. ) to your barcode, you can do it in the following link.
https://lindell.me/JsBarcode/generator/