isbn13MaybeReg top-level property

RegExp isbn13MaybeReg

getter/setter pair

A regular expression that matches exactly 13 digits.

Used to validate ISBN-13 codes, which must consist of exactly 13 numeric digits (0–9), with no separators or spaces.

Example of a valid ISBN-13: 9783161484100

Implementation

RegExp isbn13MaybeReg = RegExp(isbn13MaybeRegStr);