How to use the isISBN function from validator

nconf-validator.js

GitHub: mihirgokani007/nconf-validator

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},
date: function(x) {
  check(x, "a date", validator.isDate(x));
},
isbn: function(x) {
  check(x, "a book number", validator.isISBN(x));
},
json: function(x) {
  check(x, "a JSON object", validator.isJSON(x));
}

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bundle.js

GitHub: bevacqua/infer

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};

validator.isISBN = function (str, version) {
    version = validator.toString(version);
    if (!version) {
        return validator.isISBN(str, 10) || validator.isISBN(str, 13);
    }
    var sanitized = str.replace(/[\s-]+/g, '')
      , checksum = 0, i;
    if (version === '10') {

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express-validator2.js

GitHub: yinhaixiang/express-validator2

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  }
  return true;
},
isISBN: function(rule, value) {
  if (rule) {
    return validator.isISBN(value);
  }
  return true;
},
isJSON: function(rule, value) {

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+ 5 other calls in file

validators.js

GitHub: mmerkes/express-route-validator

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isIP: function (str, version) {
  return validator.isIP(str, typeof version !== 'boolean' ? version : undefined);
},
// isISBN(str [, version]) - check if the string is an ISBN (version 10 or 13).
isISBN: function (str, version) {
  return validator.isISBN(str, typeof version !== 'boolean' ? version : undefined);
},
// isISIN(str) - check if the string is an ISIN (stock/security identifier).
isISIN: validator.isISIN,
// isIn(str, values) - check if the string is in a array of allowed values.

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+ 17 other calls in file

validationTypes.js

GitHub: HtunHtun97/sails-hook-req-validate-json-response

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'isbn10': {
  method: (val) => V.isISBN(val, 10),
  message: 'ISBN (version 10) string'
},
'isbn13': {
  method: (val) => V.isISBN(val, 13),
  message: 'ISBN (version 13) string'
},
// check if the string is an ISSN. (https://en.wikipedia.org/wiki/International_Standard_Serial_Number)
'issn': {

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