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User : www-data

Name	Size	Permission	Date
util	[ DIR ]	drwxr-xr-x	2026-09-02 23:13
escape.js	619 B	-rw-r--r--	1985-10-26 08:15
isAfter.js	733 B	-rw-r--r--	1985-10-26 08:15
isAscii.js	551 B	-rw-r--r--	1985-10-26 08:15
isBefore.js	735 B	-rw-r--r--	1985-10-26 08:15
isCurrency.js	3.28 KB	-rw-r--r--	1985-10-26 08:15
isFQDN.js	1.68 KB	-rw-r--r--	1985-10-26 08:15
isFloat.js	1.04 KB	-rw-r--r--	1985-10-26 08:15
isHalfWidth.js	523 B	-rw-r--r--	1985-10-26 08:15
isHexadecimal.js	498 B	-rw-r--r--	1985-10-26 08:15
isIP.js	2.49 KB	-rw-r--r--	1985-10-26 08:15
isISBN.js	1.44 KB	-rw-r--r--	1985-10-26 08:15
isISIN.js	1.09 KB	-rw-r--r--	1985-10-26 08:15
isISO31661Alpha2.js	2.14 KB	-rw-r--r--	1985-10-26 08:15
isISO31661Alpha3.js	2.38 KB	-rw-r--r--	1985-10-26 08:15
isISO8601.js	1.97 KB	-rw-r--r--	1985-10-26 08:15
isISSN.js	1018 B	-rw-r--r--	1985-10-26 08:15
isJWT.js	552 B	-rw-r--r--	1985-10-26 08:15
isLatLong.js	666 B	-rw-r--r--	1985-10-26 08:15
isMD5.js	468 B	-rw-r--r--	1985-10-26 08:15
isMagnetURI.js	541 B	-rw-r--r--	1985-10-26 08:15
isMobilePhone.js	4.77 KB	-rw-r--r--	1985-10-26 08:15
isMongoId.js	561 B	-rw-r--r--	1985-10-26 08:15
isRFC3339.js	1.33 KB	-rw-r--r--	1985-10-26 08:15
isSurrogatePair.js	524 B	-rw-r--r--	1985-10-26 08:15
isUppercase.js	463 B	-rw-r--r--	1985-10-26 08:15
isWhitelisted.js	571 B	-rw-r--r--	1985-10-26 08:15
ltrim.js	534 B	-rw-r--r--	1985-10-26 08:15
matches.js	590 B	-rw-r--r--	1985-10-26 08:15
stripLow.js	642 B	-rw-r--r--	1985-10-26 08:15
toDate.js	493 B	-rw-r--r--	1985-10-26 08:15
whitelist.js	499 B	-rw-r--r--	1985-10-26 08:15

Rename

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isISBN;

var _assertString = _interopRequireDefault(require("./util/assertString"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var isbn10Maybe = /^(?:[0-9]{9}X|[0-9]{10})$/;
var isbn13Maybe = /^(?:[0-9]{13})$/;
var factor = [1, 3];

function isISBN(str) {
  var version = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
  (0, _assertString.default)(str);
  version = String(version);

if (!version) {
    return isISBN(str, 10) || isISBN(str, 13);
  }

var sanitized = str.replace(/[\s-]+/g, '');
  var checksum = 0;
  var i;

if (version === '10') {
    if (!isbn10Maybe.test(sanitized)) {
      return false;
    }

for (i = 0; i < 9; i++) {
      checksum += (i + 1) * sanitized.charAt(i);
    }

if (sanitized.charAt(9) === 'X') {
      checksum += 10 * 10;
    } else {
      checksum += 10 * sanitized.charAt(9);
    }

if (checksum % 11 === 0) {
      return !!sanitized;
    }
  } else if (version === '13') {
    if (!isbn13Maybe.test(sanitized)) {
      return false;
    }

for (i = 0; i < 12; i++) {
      checksum += factor[i % 2] * sanitized.charAt(i);
    }

if (sanitized.charAt(12) - (10 - checksum % 10) % 10 === 0) {
      return !!sanitized;
    }
  }

return false;
}

module.exports = exports.default;
module.exports.default = exports.default;