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# validator.js [![NPM version][npm-image]][npm-url] [![Build Status][travis-image]][travis-url] [![Coveralls Status][coveralls-image]][coveralls-url] [![Downloads][downloads-image]][npm-url] A library of string validators and sanitizers. ### Server-side usage Install the library with `npm install validator` ```javascript var validator = require('validator'); validator.isEmail('foo@bar.com'); //=> true ``` ### Client-side usage The library can be loaded either as a standalone script, or through an [AMD][amd]-compatible loader ```html <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] ```bash $ bower install validator-js ``` ### Validators - **contains(str, seed)** - check if the string contains the seed. - **equals(str, comparison)** - check if the string matches the comparison. - **isAfter(str [, date])** - check if the string is a date that's after the specified date (defaults to now). - **isAlpha(str)** - check if the string contains only letters (a-zA-Z). - **isAlphanumeric(str)** - check if the string contains only letters and numbers. - **isAscii(str)** - check if the string contains ASCII chars only. - **isBase64(str)** - check if a string is base64 encoded. - **isBefore(str [, date])** - check if the string is a date that's before the specified date. - **isBoolean(str)** - check if a string is a boolean. - **isByteLength(str, min [, max])** - check if the string's length (in bytes) falls in a range. - **isCreditCard(str)** - check if the string is a credit card. - **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_space_after_digits: false }`. - **isDate(str)** - check if the string is a date. - **isDivisibleBy(str, number)** - check if the string is a number that's divisible by another. - **isEmail(str [, options])** - check if the string is an email. `options` is an object which defaults to `{ allow_display_name: false, allow_utf8_local_part: true }`. If `allow_display_name` is set to true, the validator will also match `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. - **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 }`. - **isFloat(str [, options])** - check if the string is a float. `options` is an object which can contain the keys `min` and/or `max` to validate the float is within boundaries (e.g. `{ min: 7.22, max: 9.55 }`). - **isFullWidth(str)** - check if the string contains any full-width chars. - **isHalfWidth(str)** - check if the string contains any half-width chars. - **isHexColor(str)** - check if the string is a hexadecimal color. - **isHexadecimal(str)** - check if the string is a hexadecimal number. - **isIP(str [, version])** - check if the string is an IP (version 4 or 6). - **isISBN(str [, version])** - check if the string is an ISBN (version 10 or 13). - **isISIN(str)** - check if the string is an [ISIN][ISIN] (stock/security identifier). - **isIn(str, values)** - check if the string is in a 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 }`). - **isJSON(str)** - check if the string is valid JSON (note: uses JSON.parse). - **isLength(str, min [, max])** - check if the string's length falls in a range. Note: this function takes into account surrogate pairs. - **isLowercase(str)** - check if the string is lowercase. - **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['zh-CN', 'en-ZA', 'en-AU', 'en-HK', 'pt-PT', 'fr-FR', 'el-GR', 'en-GB', 'en-US', 'en-ZM']`). - **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. - **isNull(str)** - check if the string is null. - **isNumeric(str)** - check if the string contains only numbers. - **isSurrogatePair(str)** - check if the string contains any surrogate pairs chars. - **isURL(str [, options])** - check if the string is an URL. `options` is an object which defaults to `{ protocols: ['http','https','ftp'], require_tld: true, require_protocol: false, allow_underscores: false, host_whitelist: false, host_blacklist: false, allow_trailing_dot: false, allow_protocol_relative_urls: false }`. - **isUUID(str [, version])** - check if the string is a UUID (version 3, 4 or 5). - **isUppercase(str)** - check if the string is uppercase. - **isVariableWidth(str)** - check if the string contains a mixture of full and half-width chars. - **matches(str, pattern [, modifiers])** - check if string matches the pattern. Either `matches('foo', /foo/i)` or `matches('foo', 'foo', 'i')`. ### Sanitizers - **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. `options` is an object which defaults to `{ lowercase: true }`. With `lowercase` set to `true`, the local part of the email address is lowercased for all domains; the hostname is always lowercased and the local part of the email address is always lowercased for hosts that are known to be case-insensitive (currently only GMail). Normalization follows special rules for known providers: currently, GMail addresses have dots removed in the local part and are stripped of tags (e.g. `some.one+tag@gmail.com` becomes `someone@gmail.com`) and all `@googlemail.com` addresses are normalized to `@gmail.com`. - **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 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 to a date, or `null` if the input is not a date. - **toFloat(input)** - convert the input to a float, or `NaN` if the input is not a float. - **toInt(input [, radix])** - convert the input to an integer, or `NaN` if the input is not an integer. - **toString(input)** - convert the input to a string. - **trim(input [, chars])** - trim characters (whitespace by default) from both sides of the input. - **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/chriso/validator.js/commit/2d5d6999541add350fb396ef02dc42ca3215049e). For an alternative, look at Yahoo's [xss-filters library](https://github.com/yahoo/xss-fi