字符串验证
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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 validator package as:
npm i validator
yarn add validator
pnpm i validator
var validator = require('validator');
validator.isEmail('[email protected]'); //=> 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][amd]-compatible loader
<script type="text/javascript" src="validator.min.js"></script>
<script type="text/javascript">
validator.isEmail('[email protected]'); //=> true
</script>
The library can also be installed through [bower][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.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', 'bn-IN', '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', 'gu-IN', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'ja-JP', 'kk-KZ', 'kn-IN', 'ko-KR', 'ku-IQ', 'ml-IN', 'nb-NO', 'nl-NL', 'nn-NO', 'or-IN', 'pa-IN', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sk-SK', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'ta-IN', 'te-IN', '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', 'bg-BG', 'bn', 'bn-IN', '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', 'gu-IN', 'he', 'hi-IN', 'hu-HU', 'it-IT', 'ja-JP', 'kk-KZ', 'kn-IN', 'ko-KR', 'ku-IQ', 'ml-IN', 'nb-NO', 'nl-NL', 'nn-NO', 'or-IN', 'pa-IN', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'si-LK', 'sk-SK', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'ta-IN', 'te-IN', '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, padding: true }when urlSafe is true default value for padding is false and it tests the given base64 encoded string is [url safe][Base64 URL Safe]. |
| isBefore(str [, options]) | check if the string is a date that is before the specified date.options is an object that defaults to { comparisonDate: Date().toString() }.Options: comparisonDate: Date to compare to. Defaults to Date().toString() (now). |
| 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 <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 or regexp, 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 or regexp, 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', 'c |
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