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https://github.com/validatorjs/validator.js
String validation
https://github.com/validatorjs/validator.js
hacktoberfest input javascript node sanitization sanitize validate validation validations validator
Last synced: about 1 month ago
JSON representation
String validation
- Host: GitHub
- URL: https://github.com/validatorjs/validator.js
- Owner: validatorjs
- License: mit
- Created: 2010-10-06T06:58:48.000Z (almost 14 years ago)
- Default Branch: master
- Last Pushed: 2024-04-04T03:07:15.000Z (5 months ago)
- Last Synced: 2024-04-14T01:31:54.594Z (5 months ago)
- Topics: hacktoberfest, input, javascript, node, sanitization, sanitize, validate, validation, validations, validator
- Language: JavaScript
- Homepage:
- Size: 5.01 MB
- Stars: 22,517
- Watchers: 228
- Forks: 2,251
- Open Issues: 368
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE
- Security: SECURITY.md
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README
# validator.js
[![NPM version][npm-image]][npm-url]
[![CI][ci-image]][ci-url]
[![Coverage][codecov-image]][codecov-url]
[![Downloads][downloads-image]][npm-url]
[](#backers)
[](#sponsors)
[](https://github.com/alguerocode/validator.js/blob/master/LICENSE)
[![Gitter][gitter-image]][gitter-url]
A library of string validators and sanitizers.
## Strings only
**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.
## Installation and Usage
### Server-side usage
Install the `validator` package as:
```sh
npm i validator
yarn add validator
pnpm i validator
```
#### No ES6
```javascript
var validator = require('validator');
validator.isEmail('[email protected]'); //=> true
```
#### ES6
```javascript
import validator from 'validator';
```
Or, import only a subset of the library:
```javascript
import isEmail from 'validator/lib/isEmail';
```
#### Tree-shakeable ES imports
```javascript
import isEmail from 'validator/es/lib/isEmail';
```
### Client-side usage
The library can be loaded either as a standalone script, or through an [AMD][amd]-compatible loader
```html
validator.isEmail('[email protected]'); //=> true
```
The library can also be installed through [bower][bower]
```bash
$ bower install validator-js
```
CDN
```html
```
## Validators
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.
`minOccurrences`: 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][Crockford Base32].
**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][Base64 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][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', 'eo', '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)][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 `. If `require_display_name` is set to true, the validator will reject strings without the format `Display Name `. 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][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', 'eo', '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](https://en.wikipedia.org/wiki/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][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', 'PK']` 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]. 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][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][ISIN] (stock/security identifier).
**isISO6346(str)** | check if the string is a valid [ISO 6346](https://en.wikipedia.org/wiki/ISO_6346) shipping container identification.
**isISO6391(str)** | check if the string is a valid [ISO 639-1][ISO 639-1] language code.
**isISO8601(str [, options])** | check if the string is a valid [ISO 8601][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][ISO 3166-1 alpha-2] officially assigned country code.
**isISO31661Alpha3(str)** | check if the string is a valid [ISO 3166-1 alpha-3][ISO 3166-1 alpha-3] officially assigned country code.
**isISO31661Numeric(str)** | check if the string is a valid [ISO 3166-1 numeric][ISO 3166-1 numeric] officially assigned country code.
**isISO4217(str)** | check if the string is a valid [ISO 4217][ISO 4217] officially assigned currency code.
**isISRC(str)** | check if the string is an [ISRC][ISRC].
**isISSN(str [, options])** | check if the string is an [ISSN][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](https://en.wikipedia.org/wiki/Luhn_algorithm).
**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][Magnet URI Format].
**isMailtoURI(str, [, options])** | check if the string is a [Mailto URI format][Mailto URI Format].
`options` is an object of validating emails inside the URI (check `isEmail`s 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][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-GT','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][mongoid].
**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', 'eo', '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']`. Locale list is `validator.passportNumberLocales`.
**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', 'CO', '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][RFC 3339] date.
**isRgbColor(str [,options])** | check if the string is a rgb or rgba color.
`options` is an object with the following properties
`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.
`allowSpaces` defaults to `true`, which prohibits whitespace. If set to false, whitespace between color values is allowed, such as `rgb(255, 255, 255)` or even `rgba(255, 128, 0, 0.7)`.
**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'`.
`hourFormat` 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).
**isULID(str)** | check if the string is a [ULID](https://github.com/ulid/spec).
**isUUID(str [, version])** | check if the string is an RFC9562 UUID.
`version` is one of `'1'`-`'8'`, `'nil'`, `'max'`, or `'all'`.
**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][VAT Number] if validation is available for the given country code matching [ISO 3166-1 alpha-2][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')`.
## Sanitizers
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:
- *all_lowercase: true* - Transforms the local part (before the @ symbol) of all email addresses to lowercase. Please note that this may violate RFC 5321, which gives providers the possibility to treat the local part of email addresses in a case sensitive way (although in practice most - yet not all - providers don't). The domain part of the email address is always lowercased, as it is case insensitive per RFC 1035.
- *gmail_lowercase: true* - Gmail addresses are known to be case-insensitive, so this switch allows lowercasing them even when *all_lowercase* is set to false. Please note that when *all_lowercase* is true, Gmail addresses are lowercased regardless of the value of this setting.
- *gmail_remove_dots: true*: Removes dots from the local part of the email address, as Gmail ignores them (e.g. "john.doe" and "johndoe" are considered equal).
- *gmail_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "[email protected]" becomes "[email protected]").
- *gmail_convert_googlemaildotcom: true*: Converts addresses with domain @googlemail.com to @gmail.com, as they're equivalent.
- *outlookdotcom_lowercase: true* - Outlook.com addresses (including Windows Live and Hotmail) are known to be case-insensitive, so this switch allows lowercasing them even when *all_lowercase* is set to false. Please note that when *all_lowercase* is true, Outlook.com addresses are lowercased regardless of the value of this setting.
- *outlookdotcom_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "[email protected]" becomes "[email protected]").
- *yahoo_lowercase: true* - Yahoo Mail addresses are known to be case-insensitive, so this switch allows lowercasing them even when *all_lowercase* is set to false. Please note that when *all_lowercase* is true, Yahoo Mail addresses are lowercased regardless of the value of this setting.
- *yahoo_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "-" sign (e.g. "[email protected]" becomes "[email protected]").
- *icloud_lowercase: true* - iCloud addresses (including MobileMe) are known to be case-insensitive, so this switch allows lowercasing them even when *all_lowercase* is set to false. Please note that when *all_lowercase* is true, iCloud addresses are lowercased regardless of the value of this setting.
- *icloud_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "[email protected]" becomes "[email protected]").
**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
XSS sanitization was removed from the library in [2d5d6999](https://github.com/validatorjs/validator.js/commit/2d5d6999541add350fb396ef02dc42ca3215049e).
For an alternative, have a look at Yahoo's [xss-filters library](https://github.com/yahoo/xss-filters) or at [DOMPurify](https://github.com/cure53/DOMPurify).
## Maintainers
- [chriso](https://github.com/chriso) - **Chris O'Hara** (author)
- [profnandaa](https://github.com/profnandaa) - **Anthony Nandaa**
- [rubiin](https://github.com/rubiin) - **Rubin Bhandari**
- [wikirik](https://github.com/wikirik) - **Rik Smale**
- [ezkemboi](https://github.com/ezkemboi) - **Ezrqn Kemboi**
- [tux-tn](https://github.com/tux-tn) - **Sarhan Aissi**
## Reading
Remember, validating can be troublesome sometimes. See [A list of articles about programming assumptions commonly made that aren't true](https://github.com/jameslk/awesome-falsehoods).
## Contributing
We welcome contributions from the community! If you're interested in contributing to this project, please read our [Contribution Guide](CONTRIBUTING.md) to get started.
## License
This project is licensed under the [MIT](LICENSE). See the [LICENSE](LICENSE) file for details.
[downloads-image]: http://img.shields.io/npm/dm/validator.svg
[npm-url]: https://npmjs.org/package/validator
[npm-image]: http://img.shields.io/npm/v/validator.svg
[codecov-url]: https://codecov.io/gh/validatorjs/validator.js
[codecov-image]: https://codecov.io/gh/validatorjs/validator.js/branch/master/graph/badge.svg
[ci-url]: https://github.com/validatorjs/validator.js/actions?query=workflow%3ACI
[ci-image]: https://github.com/validatorjs/validator.js/workflows/CI/badge.svg?branch=master
[gitter-url]: https://gitter.im/validatorjs/community
[gitter-image]: https://badges.gitter.im/validatorjs/community.svg
[huntr-url]: https://huntr.dev/bounties/disclose/?target=https://github.com/validatorjs/validator.js
[huntr-image]: https://cdn.huntr.dev/huntr_security_badge_mono.svg
[amd]: http://requirejs.org/docs/whyamd.html
[bower]: http://bower.io/
[Crockford Base32]: http://www.crockford.com/base32.html
[Base64 URL Safe]: https://base64.guru/standards/base64url
[Data URI Format]: https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs
[European Article Number]: https://en.wikipedia.org/wiki/International_Article_Number
[Ethereum]: https://ethereum.org/
[CSS Colors Level 4 Specification]: https://developer.mozilla.org/en-US/docs/Web/CSS/color_value
[IMEI]: https://en.wikipedia.org/wiki/International_Mobile_Equipment_Identity
[ISBN]: https://en.wikipedia.org/wiki/ISBN
[ISIN]: https://en.wikipedia.org/wiki/International_Securities_Identification_Number
[ISO 639-1]: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
[ISO 8601]: https://en.wikipedia.org/wiki/ISO_8601
[ISO 3166-1 alpha-2]: https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
[ISO 3166-1 alpha-3]: https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3
[ISO 3166-1 numeric]: https://en.wikipedia.org/wiki/ISO_3166-1_numeric
[ISO 4217]: https://en.wikipedia.org/wiki/ISO_4217
[ISRC]: https://en.wikipedia.org/wiki/International_Standard_Recording_Code
[ISSN]: https://en.wikipedia.org/wiki/International_Standard_Serial_Number
[Luhn Check]: https://en.wikipedia.org/wiki/Luhn_algorithm
[Magnet URI Format]: https://en.wikipedia.org/wiki/Magnet_URI_scheme
[Mailto URI Format]: https://en.wikipedia.org/wiki/Mailto
[MIME Type]: https://en.wikipedia.org/wiki/Media_type
[mongoid]: http://docs.mongodb.org/manual/reference/object-id/
[RFC 3339]: https://tools.ietf.org/html/rfc3339
[VAT Number]: https://en.wikipedia.org/wiki/VAT_identification_number