ITF 14
ITF-14 (Interleaved Two of Five) is the GS1 implementation of an Interleaved 2 of 5 bar code to encode a Global Trade Item Number. ITF-14 symbols are generally used on packaging levels of a product, such as a case box of 24 cans of soup. The ITF-14 will always encode 14 digits.
The last digit of an ITF-14 barcode is an checksum. It is normally included but JsBarcode can automatically calculate it for you if it is left out.
JsBarcode("#barcode", "12345678901231", {
format: "ITF14"
});