ISBN Verify

Verify ISBN string format and check digit.

Demo

• Demo page

Examples

import IsbnVerify from '@saekitominaga/isbn-verify';

const isbnVerify = new IsbnVerify('978-4-06-519981-0');
isbnVerify.isValid(); // false
isbnVerify.isIsbn10(); // false
isbnVerify.isIsbn13(); // true
isbnVerify.isIsbn13({ check_digit: true }); // false
isbnVerify.verifyFormat(); // true
isbnVerify.verifyCheckDigit(); // false

Constructor

new IsbnVerify(isbn: string, strict = false)

Parameters

isbn

ISBN value to check

strict [Optional]

Strict mode. If `true`, syntax without hyphens is an error. If not specified, it defaults to `false`

Methods

isValid(): boolean

Alias of `verifyCheckDigit()`

isIsbn13(options?: isOption): boolean

Whether it is a 13-digit ISBN

isIsbn10(options?: isOption): boolean

Whether it is a 10-digit ISBN

verifyFormat(): boolean

Verify format (do not verify check digit)

verifyCheckDigit(): boolean

Verify format including check digit (not necessarily applicable publication)

Arguments of isIsbn13() and isIsbn10() method

interface isOption {
	check_digit?: boolean; // Verify format including check digit
}

* isIsbnXX({ check_digit: true }) has the same effect as isIsbnXX() && isValid().