validator
Advanced tools
The validator npm package is a library of string validators and sanitizers. It provides a variety of functions to validate and sanitize strings, such as checking if a string is in a certain format (e.g., email, URL) or transforming strings to ensure they are safe for use in different contexts.
Email Validation
Checks if the input string is an email.
const validator = require('validator');
console.log(validator.isEmail('test@example.com')); // trueURL Validation
Checks if the input string is a URL.
const validator = require('validator');
console.log(validator.isURL('https://www.example.com')); // trueSanitizing Strings
Escapes HTML characters in the input string to prevent XSS attacks.
const validator = require('validator');
console.log(validator.escape('<script>alert("xss")</script>')); // '<script>alert("xss")</script>'Checking String Length
Checks if the input string's length falls within a specified range.
const validator = require('validator');
console.log(validator.isLength('Hello', {min: 2, max: 10})); // trueBlacklisting Characters
Removes specified characters from the input string.
const validator = require('validator');
console.log(validator.blacklist('abc123', '123')); // 'abc'Joi is a powerful schema description language and data validator for JavaScript. It allows for a more detailed and structured validation process compared to validator, including the ability to create custom validation schemas.
Yup is a JavaScript schema builder for value parsing and validation. It uses a schema-based approach similar to Joi and can be integrated with form libraries like Formik. It is more focused on object schema validation.
Class-validator works with classes and decorators to validate that the properties of an object conform to specified rules. It is typically used with TypeScript and integrates well with class-based frameworks like TypeORM.
Express-validator is a set of express.js middlewares that wraps validator.js functions. It is specifically designed for use with the Express web application framework and allows for easy integration of validation into the request processing pipeline.
A library of string validators and sanitizers.
This library validates and sanitizes strings only.
If you're not sure if your input is a string, coerce it using input + ''.
Passing anything other than a string will result in an error.
Install the library with npm install validator
var validator = require('validator');
validator.isEmail('foo@bar.com'); //=> true
import validator from 'validator';
Or, import only a subset of the library:
import isEmail from 'validator/lib/isEmail';
import isEmail from 'validator/es/lib/isEmail';
The library can be loaded either as a standalone script, or through an AMD-compatible loader
<script type="text/javascript" src="validator.min.js"></script>
<script type="text/javascript">
validator.isEmail('foo@bar.com'); //=> true
</script>
The library can also be installed through bower
$ bower install validator-js
CDN
<script src="https://unpkg.com/validator@latest/validator.min.js"></script>
Here is a list of the validators currently available.
| Validator | Description |
|---|---|
| contains(str, seed [, options]) | check if the string contains the seed.options is an object that defaults to { ignoreCase: false, minOccurrences: 1 }.Options: ignoreCase: Ignore case when doing comparison, default false.minOccurences: Minimum number of occurrences for the seed in the string. Defaults to 1. |
| equals(str, comparison) | check if the string matches the comparison. |
| isAbaRouting(str) | check if the string is an ABA routing number for US bank account / cheque. |
| isAfter(str [, options]) | check if the string is a date that is after the specified date.options is an object that defaults to { comparisonDate: Date().toString() }.Options: comparisonDate: Date to compare to. Defaults to Date().toString() (now). |
| isAlpha(str [, locale, options]) | check if the string contains only letters (a-zA-Z).locale is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'bn', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'eo', 'es-ES', 'fa-IR', 'fi-FI', 'fr-CA', 'fr-FR', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'kk-KZ', 'ko-KR', 'ja-JP', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA'] and defaults to en-US. Locale list is validator.isAlphaLocales. options is an optional object that can be supplied with the following key(s): ignore which can either be a String or RegExp of characters to be ignored e.g. " -" will ignore spaces and -'s. |
| isAlphanumeric(str [, locale, options]) | check if the string contains only letters and numbers (a-zA-Z0-9).locale is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bn', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'eo', 'es-ES', 'fa-IR', 'fi-FI', 'fr-CA', 'fr-FR', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'kk-KZ', 'ko-KR', 'ja-JP','ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA']) and defaults to en-US. Locale list is validator.isAlphanumericLocales. options is an optional object that can be supplied with the following key(s): ignore which can either be a String or RegExp of characters to be ignored e.g. " -" will ignore spaces and -'s. |
| isAscii(str) | check if the string contains ASCII chars only. |
| isBase32(str [, options]) | check if the string is base32 encoded. options is optional and defaults to { crockford: false }.When crockford is true it tests the given base32 encoded string using Crockford's base32 alternative. |
| isBase58(str) | check if the string is base58 encoded. |
| isBase64(str [, options]) | check if the string is base64 encoded. options is optional and defaults to { urlSafe: false }when urlSafe is true it tests the given base64 encoded string is url safe. |
| isBefore(str [, date]) | check if the string is a date that is before the specified date. |
| isBIC(str) | check if the string is a BIC (Bank Identification Code) or SWIFT code. |
| isBoolean(str [, options]) | check if the string is a boolean.options is an object which defaults to { loose: false }. If loose is set to false, the validator will strictly match ['true', 'false', '0', '1']. If loose is set to true, the validator will also match 'yes', 'no', and will match a valid boolean string of any case. (e.g.: ['true', 'True', 'TRUE']). |
| isBtcAddress(str) | check if the string is a valid BTC address. |
| isByteLength(str [, options]) | check if the string's length (in UTF-8 bytes) falls in a range.options is an object which defaults to { min: 0, max: undefined }. |
| isCreditCard(str [, options]) | check if the string is a credit card number.options is an optional object that can be supplied with the following key(s): provider is an optional key whose value should be a string, and defines the company issuing the credit card. Valid values include ['amex', 'dinersclub', 'discover', 'jcb', 'mastercard', 'unionpay', 'visa'] or blank will check for any provider. |
| isCurrency(str [, options]) | check if the string is a valid currency amount.options is an object which defaults to { symbol: '$', require_symbol: false, allow_space_after_symbol: false, symbol_after_digits: false, allow_negatives: true, parens_for_negatives: false, negative_sign_before_digits: false, negative_sign_after_digits: false, allow_negative_sign_placeholder: false, thousands_separator: ',', decimal_separator: '.', allow_decimal: true, require_decimal: false, digits_after_decimal: [2], allow_space_after_digits: false }.Note: The array digits_after_decimal is filled with the exact number of digits allowed not a range, for example a range 1 to 3 will be given as [1, 2, 3]. |
| isDataURI(str) | check if the string is a data uri format. |
| isDate(str [, options]) | check if the string is a valid date. e.g. [2002-07-15, new Date()].options is an object which can contain the keys format, strictMode and/or delimiters.format is a string and defaults to YYYY/MM/DD.strictMode is a boolean and defaults to false. If strictMode is set to true, the validator will reject strings different from format.delimiters is an array of allowed date delimiters and defaults to ['/', '-']. |
| isDecimal(str [, options]) | check if the string represents a decimal number, such as 0.1, .3, 1.1, 1.00003, 4.0, etc.options is an object which defaults to {force_decimal: false, decimal_digits: '1,', locale: 'en-US'}.locale determines the decimal separator and is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fa', 'fa-AF', 'fa-IR', 'fr-FR', 'fr-CA', 'hu-HU', 'id-ID', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pl-Pl', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA', 'vi-VN'].Note: decimal_digits is given as a range like '1,3', a specific value like '3' or min like '1,'. |
| isDivisibleBy(str, number) | check if the string is a number that is divisible by another. |
| isEAN(str) | check if the string is an EAN (European Article Number). |
| isEmail(str [, options]) | check if the string is an email.options is an object which defaults to { allow_display_name: false, require_display_name: false, allow_utf8_local_part: true, require_tld: true, allow_ip_domain: false, allow_underscores: false, domain_specific_validation: false, blacklisted_chars: '', host_blacklist: [] }. If allow_display_name is set to true, the validator will also match Display Name <email-address>. If require_display_name is set to true, the validator will reject strings without the format Display Name <email-address>. If allow_utf8_local_part is set to false, the validator will not allow any non-English UTF8 character in email address' local part. If require_tld is set to false, email addresses without a TLD in their domain will also be matched. If ignore_max_length is set to true, the validator will not check for the standard max length of an email. If allow_ip_domain is set to true, the validator will allow IP addresses in the host part. If domain_specific_validation is true, some additional validation will be enabled, e.g. disallowing certain syntactically valid email addresses that are rejected by Gmail. If blacklisted_chars receives a string, then the validator will reject emails that include any of the characters in the string, in the name part. If host_blacklist is set to an array of strings and the part of the email after the @ symbol matches one of the strings defined in it, the validation fails. If host_whitelist is set to an array of strings and the part of the email after the @ symbol matches none of the strings defined in it, the validation fails. |
| isEmpty(str [, options]) | check if the string has a length of zero.options is an object which defaults to { ignore_whitespace: false }. |
| isEthereumAddress(str) | check if the string is an Ethereum address. Does not validate address checksums. |
| isFloat(str [, options]) | check if the string is a float.options is an object which can contain the keys min, max, gt, and/or lt to validate the float is within boundaries (e.g. { min: 7.22, max: 9.55 }) it also has locale as an option.min and max are equivalent to 'greater or equal' and 'less or equal', respectively while gt and lt are their strict counterparts.locale determines the decimal separator and is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-CA', 'fr-FR', 'hu-HU', 'it-IT', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']. Locale list is validator.isFloatLocales. |
| isFQDN(str [, options]) | check if the string is a fully qualified domain name (e.g. domain.com).options is an object which defaults to { require_tld: true, allow_underscores: false, allow_trailing_dot: false, allow_numeric_tld: false, allow_wildcard: false, ignore_max_length: false }. If allow_wildcard is set to true, the validator will allow domain starting with *. (e.g. *.example.com or *.shop.example.com). |
| isFreightContainerID(str) | alias for isISO6346, check if the string is a valid ISO 6346 shipping container identification. |
| isFullWidth(str) | check if the string contains any full-width chars. |
| isHalfWidth(str) | check if the string contains any half-width chars. |
| isHash(str, algorithm) | check if the string is a hash of type algorithm. Algorithm is one of ['crc32', 'crc32b', 'md4', 'md5', 'ripemd128', 'ripemd160', 'sha1', 'sha256', 'sha384', 'sha512', 'tiger128', 'tiger160', 'tiger192']. |
| isHexadecimal(str) | check if the string is a hexadecimal number. |
| isHexColor(str) | check if the string is a hexadecimal color. |
| isHSL(str) | check if the string is an HSL (hue, saturation, lightness, optional alpha) color based on CSS Colors Level 4 specification. Comma-separated format supported. Space-separated format supported with the exception of a few edge cases (ex: hsl(200grad+.1%62%/1)). |
| isIBAN(str, [, options]) | check if the string is an IBAN (International Bank Account Number).options is an object which accepts two attributes: whitelist: where you can restrict IBAN codes you want to receive data from and blacklist: where you can remove some of the countries from the current list. For both you can use an array with the following values ['AD','AE','AL','AT','AZ','BA','BE','BG','BH','BR','BY','CH','CR','CY','CZ','DE','DK','DO','EE','EG','ES','FI','FO','FR','GB','GE','GI','GL','GR','GT','HR','HU','IE','IL','IQ','IR','IS','IT','JO','KW','KZ','LB','LC','LI','LT','LU','LV','MC','MD','ME','MK','MR','MT','MU','MZ','NL','NO','PK','PL','PS','PT','QA','RO','RS','SA','SC','SE','SI','SK','SM','SV','TL','TN','TR','UA','VA','VG','XK']. |
| isIdentityCard(str [, locale]) | check if the string is a valid identity card code.locale is one of ['LK', 'PL', 'ES', 'FI', 'IN', 'IT', 'IR', 'MZ', 'NO', 'TH', 'zh-TW', 'he-IL', 'ar-LY', 'ar-TN', 'zh-CN', 'zh-HK'] OR 'any'. If 'any' is used, function will check if any of the locales match.Defaults to 'any'. |
| isIMEI(str [, options])) | check if the string is a valid IMEI number. IMEI should be of format ############### or ##-######-######-#.options is an object which can contain the keys allow_hyphens. Defaults to first format. If allow_hyphens is set to true, the validator will validate the second format. |
| isIn(str, values) | check if the string is in an array of allowed values. |
| isInt(str [, options]) | check if the string is an integer.options is an object which can contain the keys min and/or max to check the integer is within boundaries (e.g. { min: 10, max: 99 }). options can also contain the key allow_leading_zeroes, which when set to false will disallow integer values with leading zeroes (e.g. { allow_leading_zeroes: false }). Finally, options can contain the keys gt and/or lt which will enforce integers being greater than or less than, respectively, the value provided (e.g. {gt: 1, lt: 4} for a number between 1 and 4). |
| isIP(str [, version]) | check if the string is an IP (version 4 or 6). |
| isIPRange(str [, version]) | check if the string is an IP Range (version 4 or 6). |
| isISBN(str [, options]) | check if the string is an ISBN.options is an object that has no default.Options: version: ISBN version to compare to. Accepted values are '10' and '13'. If none provided, both will be tested. |
| isISIN(str) | check if the string is an ISIN (stock/security identifier). |
| isISO6346(str) | check if the string is a valid ISO 6346 shipping container identification. |
| isISO6391(str) | check if the string is a valid ISO 639-1 language code. |
| isISO8601(str [, options]) | check if the string is a valid ISO 8601 date. options is an object which defaults to { strict: false, strictSeparator: false }. If strict is true, date strings with invalid dates like 2009-02-29 will be invalid. If strictSeparator is true, date strings with date and time separated by anything other than a T will be invalid. |
| isISO31661Alpha2(str) | check if the string is a valid ISO 3166-1 alpha-2 officially assigned country code. |
| isISO31661Alpha3(str) | check if the string is a valid ISO 3166-1 alpha-3 officially assigned country code. |
| isISO4217(str) | check if the string is a valid ISO 4217 officially assigned currency code. |
| isISRC(str) | check if the string is an ISRC. |
| isISSN(str [, options]) | check if the string is an ISSN.options is an object which defaults to { case_sensitive: false, require_hyphen: false }. If case_sensitive is true, ISSNs with a lowercase 'x' as the check digit are rejected. |
| isJSON(str [, options]) | check if the string is valid JSON (note: uses JSON.parse).options is an object which defaults to { allow_primitives: false }. If allow_primitives is true, the primitives 'true', 'false' and 'null' are accepted as valid JSON values. |
| isJWT(str) | check if the string is valid JWT token. |
| isLatLong(str [, options]) | check if the string is a valid latitude-longitude coordinate in the format lat,long or lat, long.options is an object that defaults to { checkDMS: false }. Pass checkDMS as true to validate DMS(degrees, minutes, and seconds) latitude-longitude format. |
| isLength(str [, options]) | check if the string's length falls in a range.options is an object which defaults to { min: 0, max: undefined }. Note: this function takes into account surrogate pairs. |
| isLicensePlate(str, locale) | check if the string matches the format of a country's license plate.locale is one of ['cs-CZ', 'de-DE', 'de-LI', 'en-IN', 'en-PK', 'es-AR', 'hu-HU', 'pt-BR', 'pt-PT', 'sq-AL', 'sv-SE'] or 'any'. |
| isLocale(str) | check if the string is a locale. |
| isLowercase(str) | check if the string is lowercase. |
| isLuhnNumber(str) | check if the string passes the Luhn algorithm check. |
| isMACAddress(str [, options]) | check if the string is a MAC address.options is an object which defaults to { no_separators: false }. If no_separators is true, the validator will allow MAC addresses without separators. Also, it allows the use of hyphens, spaces or dots e.g. '01 02 03 04 05 ab', '01-02-03-04-05-ab' or '0102.0304.05ab'. The options also allow a eui property to specify if it needs to be validated against EUI-48 or EUI-64. The accepted values of eui are: 48, 64. |
| isMagnetURI(str) | check if the string is a Magnet URI format. |
| isMailtoURI(str, [, options]) | check if the string is a Mailto URI format.options is an object of validating emails inside the URI (check isEmails options for details). |
| isMD5(str) | check if the string is a MD5 hash. Please note that you can also use the isHash(str, 'md5') function. Keep in mind that MD5 has some collision weaknesses compared to other algorithms (e.g., SHA). |
| isMimeType(str) | check if the string matches to a valid MIME type format. |
| isMobilePhone(str [, locale [, options]]) | check if the string is a mobile phone number,locale is either an array of locales (e.g. ['sk-SK', 'sr-RS']) OR one of ['am-Am', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-EH', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-PS', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'az-AZ', 'az-LB', 'az-LY', 'be-BY', 'bg-BG', 'bn-BD', 'bs-BA', 'ca-AD', 'cs-CZ', 'da-DK', 'de-AT', 'de-CH', 'de-DE', 'de-LU', 'dv-MV', 'dz-BT', 'el-CY', 'el-GR', 'en-AG', 'en-AI', 'en-AU', 'en-BM', 'en-BS', 'en-BW', 'en-CA', 'en-GB', 'en-GG', 'en-GH', 'en-GY', 'en-HK', 'en-IE', 'en-IN', 'en-JM', 'en-KE', 'en-KI', 'en-KN', 'en-LS', 'en-MO', 'en-MT', 'en-MU', 'en-MW', 'en-NG', 'en-NZ', 'en-PG', 'en-PH', 'en-PK', 'en-RW', 'en-SG', 'en-SL', 'en-SS', 'en-TZ', 'en-UG', 'en-US', 'en-ZA', 'en-ZM', 'en-ZW', 'es-AR', 'es-BO', 'es-CL', 'es-CO', 'es-CR', 'es-CU', 'es-DO', 'es-EC', 'es-ES', 'es-HN', 'es-MX', 'es-NI', 'es-PA', 'es-PE', 'es-PY', 'es-SV', 'es-UY', 'es-VE', 'et-EE', 'fa-AF', 'fa-IR', 'fi-FI', 'fj-FJ', 'fo-FO', 'fr-BE', 'fr-BF', 'fr-BJ', 'fr-CD', 'fr-CF', 'fr-FR', 'fr-GF', 'fr-GP', 'fr-MQ', 'fr-PF', 'fr-RE', 'fr-WF', 'ga-IE', 'he-IL', 'hu-HU', 'id-ID', 'ir-IR', 'it-IT', 'it-SM', 'ja-JP', 'ka-GE', 'kk-KZ', 'kl-GL', 'ko-KR', 'ky-KG', 'lt-LT', 'mg-MG', 'mn-MN', 'ms-MY', 'my-MM', 'mz-MZ', 'nb-NO', 'ne-NP', 'nl-AW', 'nl-BE', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-AO', 'pt-BR', 'pt-PT', 'ro-Md', 'ro-RO', 'ru-RU', 'si-LK', 'sk-SK', 'sl-SI', 'so-SO', 'sq-AL', 'sr-RS', 'sv-SE', 'tg-TJ', 'th-TH', 'tk-TM', 'tr-TR', 'uk-UA', 'uz-UZ', 'vi-VN', 'zh-CN', 'zh-HK', 'zh-MO', 'zh-TW'] OR defaults to 'any'. If 'any' or a falsey value is used, function will check if any of the locales match).options is an optional object that can be supplied with the following keys: strictMode, if this is set to true, the mobile phone number must be supplied with the country code and therefore must start with +. Locale list is validator.isMobilePhoneLocales. |
| isMongoId(str) | check if the string is a valid hex-encoded representation of a MongoDB ObjectId. |
| isMultibyte(str) | check if the string contains one or more multibyte chars. |
| isNumeric(str [, options]) | check if the string contains only numbers.options is an object which defaults to { no_symbols: false } it also has locale as an option. If no_symbols is true, the validator will reject numeric strings that feature a symbol (e.g. +, -, or .).locale determines the decimal separator and is one of ['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fr-CA', 'hu-HU', 'it-IT', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']. |
| isOctal(str) | check if the string is a valid octal number. |
| isPassportNumber(str, countryCode) | check if the string is a valid passport number.countryCode is one of ['AM', 'AR', 'AT', 'AU', 'AZ', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE', 'IN', 'IR', 'ID', 'IS', 'IT', 'JM', 'JP', 'KR', 'KZ', 'LI', 'LT', 'LU', 'LV', 'LY', 'MT', 'MX', 'MY', 'MZ', 'NL', 'NZ', 'PH', 'PK', 'PL', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TH', 'TR', 'UA', 'US', 'ZA']. |
| isPort(str) | check if the string is a valid port number. |
| isPostalCode(str, locale) | check if the string is a postal code.locale is one of ['AD', 'AT', 'AU', 'AZ', 'BA', 'BE', 'BG', 'BR', 'BY', 'CA', 'CH', 'CN', 'CZ', 'DE', 'DK', 'DO', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HT', 'HU', 'ID', 'IE', 'IL', 'IN', 'IR', 'IS', 'IT', 'JP', 'KE', 'KR', 'LI', 'LK', 'LT', 'LU', 'LV', 'MG', 'MT', 'MX', 'MY', 'NL', 'NO', 'NP', 'NZ', 'PL', 'PR', 'PT', 'RO', 'RU', 'SA', 'SE', 'SG', 'SI', 'SK', 'TH', 'TN', 'TW', 'UA', 'US', 'ZA', 'ZM'] OR 'any'. If 'any' is used, function will check if any of the locales match. Locale list is validator.isPostalCodeLocales. |
| isRFC3339(str) | check if the string is a valid RFC 3339 date. |
| isRgbColor(str [, includePercentValues]) | check if the string is a rgb or rgba color.includePercentValues defaults to true. If you don't want to allow to set rgb or rgba values with percents, like rgb(5%,5%,5%), or rgba(90%,90%,90%,.3), then set it to false. |
| isSemVer(str) | check if the string is a Semantic Versioning Specification (SemVer). |
| isSurrogatePair(str) | check if the string contains any surrogate pairs chars. |
| isUppercase(str) | check if the string is uppercase. |
| isSlug(str) | check if the string is of type slug. |
| isStrongPassword(str [, options]) | check if the string can be considered a strong password or not. Allows for custom requirements or scoring rules. If returnScore is true, then the function returns an integer score for the password rather than a boolean.Default options: { minLength: 8, minLowercase: 1, minUppercase: 1, minNumbers: 1, minSymbols: 1, returnScore: false, pointsPerUnique: 1, pointsPerRepeat: 0.5, pointsForContainingLower: 10, pointsForContainingUpper: 10, pointsForContainingNumber: 10, pointsForContainingSymbol: 10 } |
| isTime(str [, options]) | check if the string is a valid time e.g. [23:01:59, new Date().toLocaleTimeString()].options is an object which can contain the keys hourFormat or mode.hourFormat is a key and defaults to 'hour24'.mode is a key and defaults to 'default'. hourFomat can contain the values 'hour12' or 'hour24', 'hour24' will validate hours in 24 format and 'hour12' will validate hours in 12 format. mode can contain the values 'default' or 'withSeconds', 'default' will validate HH:MM format, 'withSeconds' will validate the HH:MM:SS format. |
| isTaxID(str, locale) | check if the string is a valid Tax Identification Number. Default locale is en-US.More info about exact TIN support can be found in src/lib/isTaxID.js.Supported locales: [ 'bg-BG', 'cs-CZ', 'de-AT', 'de-DE', 'dk-DK', 'el-CY', 'el-GR', 'en-CA', 'en-GB', 'en-IE', 'en-US', 'es-AR', 'es-ES', 'et-EE', 'fi-FI', 'fr-BE', 'fr-CA', 'fr-FR', 'fr-LU', 'hr-HR', 'hu-HU', 'it-IT', 'lb-LU', 'lt-LT', 'lv-LV', 'mt-MT', 'nl-BE', 'nl-NL', 'pl-PL', 'pt-BR', 'pt-PT', 'ro-RO', 'sk-SK', 'sl-SI', 'sv-SE', 'uk-UA']. |
| isURL(str [, options]) | check if the string is a URL.options is an object which defaults to { protocols: ['http','https','ftp'], require_tld: true, require_protocol: false, require_host: true, require_port: false, require_valid_protocol: true, allow_underscores: false, host_whitelist: false, host_blacklist: false, allow_trailing_dot: false, allow_protocol_relative_urls: false, allow_fragments: true, allow_query_components: true, disallow_auth: false, validate_length: true }.require_protocol - if set to true isURL will return false if protocol is not present in the URL.require_valid_protocol - isURL will check if the URL's protocol is present in the protocols option.protocols - valid protocols can be modified with this option.require_host - if set to false isURL will not check if host is present in the URL.require_port - if set to true isURL will check if port is present in the URL.allow_protocol_relative_urls - if set to true protocol relative URLs will be allowed.allow_fragments - if set to false isURL will return false if fragments are present.allow_query_components - if set to false isURL will return false if query components are present.validate_length - if set to false isURL will skip string length validation (2083 characters is IE max URL length). |
| isUUID(str [, version]) | check if the string is a UUID (version 1, 2, 3, 4 or 5). |
| isVariableWidth(str) | check if the string contains a mixture of full and half-width chars. |
| isVAT(str, countryCode) | check if the string is a valid VAT number if validation is available for the given country code matching ISO 3166-1 alpha-2. countryCode is one of ['AL', 'AR', 'AT', 'AU', 'BE', 'BG', 'BO', 'BR', 'BY', 'CA', 'CH', 'CL', 'CO', 'CR', 'CY', 'CZ', 'DE', 'DK', 'DO', 'EC', 'EE', 'EL', 'ES', 'FI', 'FR', 'GB', 'GT', 'HN', 'HR', 'HU', 'ID', 'IE', 'IL', 'IN', 'IS', 'IT', 'KZ', 'LT', 'LU', 'LV', 'MK', 'MT', 'MX', 'NG', 'NI', 'NL', 'NO', 'NZ', 'PA', 'PE', 'PH', 'PL', 'PT', 'PY', 'RO', 'RS', 'RU', 'SA', 'SE', 'SI', 'SK', 'SM', 'SV', 'TR', 'UA', 'UY', 'UZ', 'VE']. |
| isWhitelisted(str, chars) | check if the string consists only of characters that appear in the whitelist chars. |
| matches(str, pattern [, modifiers]) | check if the string matches the pattern. Either matches('foo', /foo/i) or matches('foo', 'foo', 'i'). |
Here is a list of the sanitizers currently available.
| Sanitizer | Description |
|---|---|
| blacklist(input, chars) | remove characters that appear in the blacklist. The characters are used in a RegExp and so you will need to escape some chars, e.g. blacklist(input, '\\[\\]'). |
| escape(input) | replace <, >, &, ', " and / with HTML entities. |
| ltrim(input [, chars]) | trim characters from the left-side of the input. |
| normalizeEmail(email [, options]) | canonicalize an email address. (This doesn't validate that the input is an email, if you want to validate the email use isEmail beforehand).options is an object with the following keys and default values:
|
| rtrim(input [, chars]) | trim characters from the right-side of the input. |
| stripLow(input [, keep_new_lines]) | remove characters with a numerical value < 32 and 127, mostly control characters. If keep_new_lines is true, newline characters are preserved (\n and \r, hex 0xA and 0xD). Unicode-safe in JavaScript. |
| toBoolean(input [, strict]) | convert the input string to a boolean. Everything except for '0', 'false' and '' returns true. In strict mode only '1' and 'true' return true. |
| toDate(input) | convert the input string to a date, or null if the input is not a date. |
| toFloat(input) | convert the input string to a float, or NaN if the input is not a float. |
| toInt(input [, radix]) | convert the input string to an integer, or NaN if the input is not an integer. |
| trim(input [, chars]) | trim characters (whitespace by default) from both sides of the input. |
| unescape(input) | replace HTML encoded entities with <, >, &, ', " and /. |
| whitelist(input, chars) | remove characters that do not appear in the whitelist. The characters are used in a RegExp and so you will need to escape some chars, e.g. whitelist(input, '\\[\\]'). |
XSS sanitization was removed from the library in 2d5d6999.
For an alternative, have a look at Yahoo's xss-filters library or at DOMPurify.
Remember, validating can be troublesome sometimes. See A list of articles about programming assumptions commonly made that aren't true.
Copyright (c) 2018 Chris O'Hara <cohara87@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
String validation and sanitization
The npm package validator receives a total of 7,847,326 weekly downloads. As such, validator popularity was classified as popular.
We found that validator demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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