221 lines
23 KiB
Markdown
221 lines
23 KiB
Markdown
# validator.js
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[![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Downloads][downloads-image]][npm-url]
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A library of string validators and sanitizers.
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## Strings only
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**This library validates and sanitizes strings only.**
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If you're not sure if your input is a string, coerce it using `input + ''`.
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Passing anything other than a string is an error.
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## Installation and Usage
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### Server-side usage
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Install the library with `npm install validator`
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#### No ES6
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```javascript
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var validator = require('validator');
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validator.isEmail('foo@bar.com'); //=> true
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```
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#### ES6
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```javascript
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import validator from 'validator';
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```
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Or, import only a subset of the library:
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```javascript
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import isEmail from 'validator/lib/isEmail';
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```
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### Client-side usage
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The library can be loaded either as a standalone script, or through an [AMD][amd]-compatible loader
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```html
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<script type="text/javascript" src="validator.min.js"></script>
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<script type="text/javascript">
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validator.isEmail('foo@bar.com'); //=> true
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</script>
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```
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The library can also be installed through [bower][bower]
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```bash
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$ bower install validator-js
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```
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## Validators
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Here is a list of the validators currently available.
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Validator | Description
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--------------------------------------- | --------------------------------------
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***contains(str, seed)*** | check if the string contains the seed.
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**equals(str, comparison)** | check if the string matches the comparison.
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**isAfter(str [, date])** | check if the string is a date that's after the specified date (defaults to now).
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**isAlpha(str [, locale])** | check if the string contains only letters (a-zA-Z).<br/><br/>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', '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', 'fr-FR', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphaLocales`.
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**isAlphanumeric(str [, locale])** | check if the string contains only letters and numbers.<br/><br/>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', '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', 'fr-FR', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphanumericLocales`.
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**isAscii(str)** | check if the string contains ASCII chars only.
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**isBase64(str)** | check if a string is base64 encoded.
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**isBefore(str [, date])** | check if the string is a date that's before the specified date.
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**isBoolean(str)** | check if a string is a boolean.
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**isByteLength(str [, options])** | check if the string's length (in UTF-8 bytes) falls in a range.<br/><br/>`options` is an object which defaults to `{min:0, max: undefined}`.
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**isCreditCard(str)** | check if the string is a credit card.
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**isCurrency(str [, options])** | check if the string is a valid currency amount.<br/><br/>`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}`.<br/>**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].
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**isDataURI(str)** | check if the string is a [data uri format](https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs).
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**isMagnetURI(str)** | check if the string is a [magnet uri format](https://en.wikipedia.org/wiki/Magnet_URI_scheme).
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**isDecimal(str [, options])** | check if the string represents a decimal number, such as 0.1, .3, 1.1, 1.00003, 4.0, etc.<br/><br/>`options` is an object which defaults to `{force_decimal: false, decimal_digits: '1,', locale: 'en-US'}`<br/><br/>`locale` determine 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', 'hu-HU', 'it-IT', 'ku-IQ', 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']`.<br/>**Note:** `decimal_digits` is given as a range like '1,3', a specific value like '3' or min like '1,'.
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**isDivisibleBy(str, number)** | check if the string is a number that's divisible by another.
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**isEmail(str [, options])** | check if the string is an email.<br/><br/>`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, domain_specific_validation: false }`. 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, e-mail addresses without having TLD in their domain will also be matched. 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.
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**isEmpty(str [, options])** | check if the string has a length of zero.<br/><br/>`options` is an object which defaults to `{ ignore_whitespace:false }`.
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**isFQDN(str [, options])** | check if the string is a fully qualified domain name (e.g. domain.com).<br/><br/>`options` is an object which defaults to `{ require_tld: true, allow_underscores: false, allow_trailing_dot: false }`.
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**isFloat(str [, options])** | check if the string is a float.<br/><br/>`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.<br/><br/>`min` and `max` are equivalent to 'greater or equal' and 'less or equal', respectively while `gt` and `lt` are their strict counterparts.<br/><br/>`locale` determine 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', '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`.
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**isFullWidth(str)** | check if the string contains any full-width chars.
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**isHalfWidth(str)** | check if the string contains any half-width chars.
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**isHash(str, algorithm)** | check if the string is a hash of type algorithm.<br/><br/>Algorithm is one of `['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128', 'tiger160', 'tiger192', 'crc32', 'crc32b']`
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**isHexColor(str)** | check if the string is a hexadecimal color.
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**isHexadecimal(str)** | check if the string is a hexadecimal number.
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**isIdentityCard(str [, locale])** | check if the string is a valid identity card code.<br/><br/>`locale` is one of `['ES']` OR `'any'`. If 'any' is used, function will check if any of the locals match.<br/><br/>Defaults to 'any'.
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**isIP(str [, version])** | check if the string is an IP (version 4 or 6).
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**isIPRange(str)** | check if the string is an IP Range(version 4 only).
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**isISBN(str [, version])** | check if the string is an ISBN (version 10 or 13).
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**isISSN(str [, options])** | check if the string is an [ISSN](https://en.wikipedia.org/wiki/International_Standard_Serial_Number).<br/><br/>`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.
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**isISIN(str)** | check if the string is an [ISIN][ISIN] (stock/security identifier).
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**isISO8601(str)** | check if the string is a valid [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) date.
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**isRFC3339(str)** | check if the string is a valid [RFC 3339](https://tools.ietf.org/html/rfc3339) date.
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**isISO31661Alpha2(str)** | check if the string is a valid [ISO 3166-1 alpha-2](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) officially assigned country code.
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**isISO31661Alpha3(str)** | check if the string is a valid [ISO 3166-1 alpha-3](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-3) officially assigned country code.
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**isISRC(str)** | check if the string is a [ISRC](https://en.wikipedia.org/wiki/International_Standard_Recording_Code).
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**isIn(str, values)** | check if the string is in a array of allowed values.
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**isInt(str [, options])** | check if the string is an integer.<br/><br/>`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).
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**isJSON(str)** | check if the string is valid JSON (note: uses JSON.parse).
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**isJWT(str)** | check if the string is valid JWT token.
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**isLatLong(str)** | check if the string is a valid latitude-longitude coordinate in the format `lat,long` or `lat, long`.
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**isLength(str [, options])** | check if the string's length falls in a range.<br/><br/>`options` is an object which defaults to `{min:0, max: undefined}`. Note: this function takes into account surrogate pairs.
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**isLowercase(str)** | check if the string is lowercase.
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**isMACAddress(str)** | check if the string is a MAC address.<br/><br/>`options` is an object which defaults to `{no_colons: false}`. If `no_colons` is true, the validator will allow MAC addresses without the colons.
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**isMD5(str)** | check if the string is a MD5 hash.
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**isMimeType(str)** | check if the string matches to a valid [MIME type](https://en.wikipedia.org/wiki/Media_type) format
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**isMobilePhone(str [, locale [, options]])** | check if the string is a mobile phone number,<br/><br/>(locale is either an array of locales (e.g `['sk-SK', 'sr-RS']`) OR one of `['ar-AE', 'ar-DZ', 'ar-EG', 'ar-IQ', ar-JO', 'ar-KW', 'ar-SA', 'ar-SY', 'ar-TN', 'be-BY', 'bg-BG', 'bn-BD', 'cs-CZ', 'de-DE', 'da-DK', 'el-GR', 'en-AU', 'en-CA', 'en-GB', 'en-HK', 'en-IN', 'en-KE', 'en-NG', 'en-NZ', 'en-RW', 'en-SG', 'en-UG', 'en-US', 'en-TZ', 'en-ZA', 'en-ZM', 'en-PK', 'es-ES', 'es-MX','et-EE', 'fa-IR', 'fi-FI', 'fr-FR', 'he-IL', 'hu-HU', 'it-IT', 'ja-JP', 'kk-KZ', 'ko-KR', 'lt-LT', 'ms-MY', 'nb-NO', 'nn-NO', 'pl-PL', 'pt-PT', 'pt-BR', 'ro-RO', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA', 'vi-VN', 'zh-CN', 'zh-HK', 'zh-TW']` OR defaults to 'any'. If 'any' or a falsey value is used, function will check if any of the locales match).<br/><br/>`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`.
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**isMongoId(str)** | check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
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**isMultibyte(str)** | check if the string contains one or more multibyte chars.
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**isNumeric(str [, options])** | check if the string contains only numbers.<br/><br/>`options` is an object which defaults to `{no_symbols: false}`. If `no_symbols` is true, the validator will reject numeric strings that feature a symbol (e.g. `+`, `-`, or `.`).
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**isPort(str)** | check if the string is a valid port number.
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**isPostalCode(str, locale)** | check if the string is a postal code,<br/><br/>(locale is one of `[ 'AD', 'AT', 'AU', 'BE', 'BG', 'CA', 'CH', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IL', 'IN', 'IS', 'IT', 'JP', 'KE', 'LI', 'LT', 'LU', 'LV', 'MX', 'NL', 'NO', 'PL', 'PT', 'RO', 'RU', 'SA', 'SE', 'SI', 'TN', 'TW', 'US', 'ZA', 'ZM' ]` OR 'any'. If 'any' is used, function will check if any of the locals match. Locale list is `validator.isPostalCodeLocales`.).
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**isSurrogatePair(str)** | check if the string contains any surrogate pairs chars.
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**isURL(str [, options])** | check if the string is an URL.<br/><br/>`options` is an object which defaults to `{ protocols: ['http','https','ftp'], require_tld: true, require_protocol: false, require_host: true, require_valid_protocol: true, allow_underscores: false, host_whitelist: false, host_blacklist: false, allow_trailing_dot: false, allow_protocol_relative_urls: false }`.
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**isUUID(str [, version])** | check if the string is a UUID (version 3, 4 or 5).
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**isUppercase(str)** | check if the string is uppercase.
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**isVariableWidth(str)** | check if the string contains a mixture of full and half-width chars.
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**isWhitelisted(str, chars)** | checks characters if they appear in the whitelist.
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**matches(str, pattern [, modifiers])** | check if string matches the pattern.<br/><br/>Either `matches('foo', /foo/i)` or `matches('foo', 'foo', 'i')`.
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## Sanitizers
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Here is a list of the sanitizers currently available.
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Sanitizer | Description
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-------------------------------------- | -------------------------------
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**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, '\\[\\]')`.
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**escape(input)** | replace `<`, `>`, `&`, `'`, `"` and `/` with HTML entities.
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**unescape(input)** | replaces HTML encoded entities with `<`, `>`, `&`, `'`, `"` and `/`.
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**ltrim(input [, chars])** | trim characters from the left-side of the input.
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**normalizeEmail(email [, options])** | canonicalizes an email address. (This doesn't validate that the input is an email, if you want to validate the email use isEmail beforehand)<br/><br/>`options` is an object with the following keys and default values:<br/><ul><li>*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's case insensitive per RFC 1035.</li><li>*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.</li><li>*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).</li><li>*gmail_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "foo+bar@gmail.com" becomes "foo@gmail.com").</li><li>*gmail_convert_googlemaildotcom: true*: Converts addresses with domain @googlemail.com to @gmail.com, as they're equivalent.</li><li>*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.</li><li>*outlookdotcom_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "foo+bar@outlook.com" becomes "foo@outlook.com").</li><li>*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.</li><li>*yahoo_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "-" sign (e.g. "foo-bar@yahoo.com" becomes "foo@yahoo.com").</li><li>*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.</li><li>*icloud_remove_subaddress: true*: Normalizes addresses by removing "sub-addresses", which is the part following a "+" sign (e.g. "foo+bar@icloud.com" becomes "foo@icloud.com").</li></ul>
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**rtrim(input [, chars])** | trim characters from the right-side of the input.
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**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.
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**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`.
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**toDate(input)** | convert the input string to a date, or `null` if the input is not a date.
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**toFloat(input)** | convert the input string to a float, or `NaN` if the input is not a float.
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**toInt(input [, radix])** | convert the input string to an integer, or `NaN` if the input is not an integer.
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**trim(input [, chars])** | trim characters (whitespace by default) from both sides of the input.
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**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, '\\[\\]')`.
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### XSS Sanitization
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XSS sanitization was removed from the library in [2d5d6999](https://github.com/chriso/validator.js/commit/2d5d6999541add350fb396ef02dc42ca3215049e).
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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).
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## Contributing
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In general, we follow the "fork-and-pull" Git workflow.
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1. Fork the repo on GitHub
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2. Clone the project to your own machine
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3. Work on your fork
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1. Make your changes and additions
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2. Change or add tests if needed
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3. Run tests and make sure they pass
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4. Add changes to README.md if needed
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4. Commit changes to your own branch
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5. **Make sure** you merge the latest from "upstream" and resolve conflicts if there is any
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6. Repeat step 3(3) above
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7. Push your work back up to your fork
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8. Submit a Pull request so that we can review your changes
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## Tests
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Tests are using mocha, to run the tests use:
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```sh
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$ npm test
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```
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## Maintainers
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- [chriso](https://github.com/chriso) - **Chris O'Hara** (author)
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- [profnandaa](https://github.com/profnandaa) - **Anthony Nandaa**
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## Reading
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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).
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## License (MIT)
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```
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Copyright (c) 2018 Chris O'Hara <cohara87@gmail.com>
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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||
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.
|
||
```
|
||
|
||
[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
|
||
|
||
[travis-url]: https://travis-ci.org/chriso/validator.js
|
||
[travis-image]: http://img.shields.io/travis/chriso/validator.js.svg
|
||
|
||
[amd]: http://requirejs.org/docs/whyamd.html
|
||
[bower]: http://bower.io/
|
||
|
||
[mongoid]: http://docs.mongodb.org/manual/reference/object-id/
|
||
[ISIN]: https://en.wikipedia.org/wiki/International_Securities_Identification_Number
|