Verify ISBN string format and check digit
Examples
import IsbnVerify from '@saekitominaga/isbn-verify';
const isbnVerify1 = new IsbnVerify('978-4-06-519981-0'); // ISBN with correct format but wrong check digit
isbnVerify1.isValid(); // false
isbnVerify1.isIsbn10(); // false
isbnVerify1.isIsbn10({ check_digit: true }); // false
isbnVerify1.isIsbn13(); // true
isbnVerify1.isIsbn13({ check_digit: true }); // false
isbnVerify1.verify(); // true
isbnVerify1.verify({ check_digit: true }); // false
const isbnVerify2 = new IsbnVerify('9784065199817');
isbnVerify2.isValid(); // true
const isbnVerify3 = new IsbnVerify('9784065199817', { strict: true });
isbnVerify3.isValid(); // false
Constructor
new IsbnVerify(isbn: string, options?: Option)
Parameters
-
isbn
[Required]
- ISBN value
-
options
[Optional]
- See below for details
Option
interface Option {
strict?: boolean; // If `true`, syntax without hyphens is an error. If not specified, it defaults to `false`
}
Methods
isValid(): boolean
- Verify both format and check digit (Alias of
verify({ check_digit: true })
)
isIsbn13(options?: VerifyOption): boolean
- Whether it is a current standard (13 digit) ISBN or not
isIsbn10(options?: VerifyOption): boolean
- Whether it is a old standard (10 digit) ISBN or not
verify(options?: VerifyOption): boolean
- Verify format, optionally check digit
Option
interface VerifyOption {
check_digit?: boolean; // Verify format including check digit
}