// Type definitions for validator.js 12.0
// Project: https://github.com/validatorjs/validator.js
// Definitions by: tgfjt <https://github.com/tgfjt>
//                 Ilya Mochalov <https://github.com/chrootsu>
//                 Ayman Nedjmeddine <https://github.com/IOAyman>
//                 Louay Alakkad <https://github.com/louy>
//                 Kacper Polak <https://github.com/kacepe>
//                 Bonggyun Lee <https://github.com/deptno>
//                 Naoto Yokoyama <https://github.com/builtinnya>
//                 Philipp Katz <https://github.com/qqilihq>
//                 Jace Warren <https://github.com/keatz55>
//                 Munif Tanjim <https://github.com/MunifTanjim>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.1

declare namespace validator {
    const version: string;

    /******************
     *** Validators ***
     ******************/

    /**
     * Check if the string contains the seed.
     *
     * @param seed - Seed
     */
    function contains(str: string, seed: any): boolean;

    /**
     * Check if the string matches the comparison.
     *
     * @param comparison - String to compare
     */
    function equals(str: string, comparison: string): boolean;

    /**
     * Check if the string is a date that's after the specified date.
     *
     * @param [date] - Date string (defaults to now)
     */
    function isAfter(str: string, date?: string): boolean;

    type AlphaLocale =
        | 'en-US'
        | 'bg-BG'
        | 'cs-CZ'
        | 'da-DK'
        | 'de-DE'
        | 'el-GR'
        | 'es-ES'
        | 'fr-FR'
        | 'it-IT'
        | 'nb-NO'
        | 'nl-NL'
        | 'nn-NO'
        | 'hu-HU'
        | 'pl-PL'
        | 'pt-PT'
        | 'ru-RU'
        | 'sl-SI'
        | 'sk-SK'
        | 'sr-RS@latin'
        | 'sr-RS'
        | 'sv-SE'
        | 'tr-TR'
        | 'uk-UA'
        | 'ku-IQ'
        | 'ar'
        | 'he'
        | 'fa-IR'
        | 'en-AU'
        | 'en-GB'
        | 'en-HK'
        | 'en-IN'
        | 'en-NZ'
        | 'en-ZA'
        | 'en-ZM'
        | 'ar-AE'
        | 'ar-BH'
        | 'ar-DZ'
        | 'ar-EG'
        | 'ar-IQ'
        | 'ar-JO'
        | 'ar-KW'
        | 'ar-LB'
        | 'ar-LY'
        | 'ar-MA'
        | 'ar-QM'
        | 'ar-QA'
        | 'ar-SA'
        | 'ar-SD'
        | 'ar-SY'
        | 'ar-TN'
        | 'ar-YE'
        | 'pt-BR'
        | 'pl-Pl';

    const isAlphaLocales: AlphaLocale[];

    /**
     * Check if the string contains only letters (a-zA-Z).
     *
     * @param [locale] - AlphaLocale
     */
    function isAlpha(str: string, locale?: AlphaLocale): boolean;

    type AlphanumericLocale =
        | 'en-US'
        | 'bg-BG'
        | 'cs-CZ'
        | 'da-DK'
        | 'de-DE'
        | 'el-GR'
        | 'es-ES'
        | 'fr-FR'
        | 'it-IT'
        | 'hu-HU'
        | 'nb-NO'
        | 'nl-NL'
        | 'nn-NO'
        | 'pl-PL'
        | 'pt-PT'
        | 'ru-RU'
        | 'sl-SI'
        | 'sk-SK'
        | 'sr-RS@latin'
        | 'sr-RS'
        | 'sv-SE'
        | 'tr-TR'
        | 'uk-UA'
        | 'ku-IQ'
        | 'ar'
        | 'he'
        | 'fa-IR'
        | 'en-AU'
        | 'en-GB'
        | 'en-HK'
        | 'en-IN'
        | 'en-NZ'
        | 'en-ZA'
        | 'en-ZM'
        | 'ar-AE'
        | 'ar-BH'
        | 'ar-DZ'
        | 'ar-EG'
        | 'ar-IQ'
        | 'ar-JO'
        | 'ar-KW'
        | 'ar-LB'
        | 'ar-LY'
        | 'ar-MA'
        | 'ar-QM'
        | 'ar-QA'
        | 'ar-SA'
        | 'ar-SD'
        | 'ar-SY'
        | 'ar-TN'
        | 'ar-YE'
        | 'pt-BR'
        | 'pl-Pl';

    const isAlphanumericLocales: AlphanumericLocale[];

    /**
     * Check if the string contains only letters and numbers.
     *
     * @param [locale] - AlphanumericLocale
     */
    function isAlphanumeric(str: string, locale?: AlphanumericLocale): boolean;

    /**
     * Check if the string contains ASCII chars only.
     */
    function isAscii(str: string): boolean;

    /**
     * Check if a string is base32 encoded.
     */
    function isBase32(str: string): boolean;

    /**
     * Check if a string is base64 encoded.
     */
    function isBase64(str: string): boolean;

    /**
     * Check if the string is a date that's before the specified date.
     *
     * @param [date] - Date string (defaults to now)
     */
    function isBefore(str: string, date?: string): boolean;

    /**
     * Check if a string is a BIC (Bank Identification Code) or SWIFT code.
     */
    function isBIC(str: string): boolean;

    /**
     * check if a string is a boolean.
     */
    function isBoolean(str: string): boolean;

    interface IsByteLengthOptions {
        /**
         * @default 0
         */
        min?: number;
        /**
         * @default undefined
         */
        max?: number;
    }

    /**
     * Check if the string's length (in UTF-8 bytes) falls in a range.
     *
     * @param [options] - Options
     */
    function isByteLength(str: string, options?: IsByteLengthOptions): boolean;

    /**
     * Check if the string is a credit card.
     */
    function isCreditCard(str: string): boolean;

    interface IsCurrencyOptions {
        /**
         * @default '$'
         */
        symbol?: string;
        /**
         * @default false
         */
        require_symbol?: boolean;
        /**
         * @default false
         */
        allow_space_after_symbol?: boolean;
        /**
         * @default false
         */
        symbol_after_digits?: boolean;
        /**
         * @default true
         */
        allow_negatives?: boolean;
        /**
         * @default false
         */
        parens_for_negatives?: boolean;
        /**
         * @default false
         */
        negative_sign_before_digits?: boolean;
        /**
         * @default false
         */
        negative_sign_after_digits?: boolean;
        /**
         * @default false
         */
        allow_negative_sign_placeholder?: boolean;
        /**
         * @default ','
         */
        thousands_separator?: string;
        /**
         * @default '.'
         */
        decimal_separator?: string;
        /**
         * @default true
         */
        allow_decimal?: boolean;
        /**
         * @default false
         */
        require_decimal?: boolean;
        /**
         * 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]`.
         *
         * @default [2]
         */
        digits_after_decimal?: number[];
        /**
         * @default false
         */
        allow_space_after_digits?: boolean;
    }

    /**
     * Check if the string is a valid currency amount.
     *
     * @param [options] - Options
     */
    function isCurrency(str: string, options?: IsCurrencyOptions): boolean;

    /**
     * Check if the string is a [data uri format](https://developer.mozilla.org/en-US/docs/Web/HTTP/data_URIs).
     */
    function isDataURI(str: string): boolean;

    type DecimalLocale = FloatLocale;

    interface IsDecimalOptions {
        /**
         * @default false
         */
        force_decimal?: boolean;
        /**
         * `decimal_digits` is given as a range like `'1,3'`,
         * a specific value like `'3'` or min like `'1,'`
         *
         * @default '1,'
         */
        decimal_digits?: string;
        /**
         * DecimalLocale
         *
         * @default 'en-US'
         */
        locale?: DecimalLocale;
    }

    /**
     * Check if the string represents a decimal number,
     * such as `0.1`, `.3`, `1.1`, `1.00003`, `4.0` etc.
     *
     * @param [options] - Options
     */
    function isDecimal(str: string, options?: IsDecimalOptions): boolean;

    /**
     * Check if the string is a number that's divisible by another.
     *
     * @param number - Divider number
     */
    function isDivisibleBy(str: string, number: number): boolean;

    interface IsEmailOptions {
        /**
         * If `allow_display_name` is set to `true`, the validator will also match `Display Name <email-address>`.
         *
         * @default false
         */
        allow_display_name?: boolean;
        /**
         * If `require_display_name` is set to `true`, the validator will reject strings without the format `Display Name <email-address>`.
         *
         * @default false
         */
        require_display_name?: boolean;
        /**
         * If `allow_utf8_local_part` is set to `false`, the validator will not allow any non-English UTF8 character in email address' local part.
         *
         * @default true
         */
        allow_utf8_local_part?: boolean;
        /**
         * If `require_tld` is set to `false`, e-mail addresses without having TLD in their domain will also be matched.
         *
         * @default true
         */
        require_tld?: boolean;
        /**
         * If `ignore_max_length` is set to `true`, the validator will not check for the standard max length of an email.
         *
         * @default false
         */
        ignore_max_length?: boolean;
        /**
         * If `allow_ip_domain` is set to `true`, the validator will allow IP addresses in the host part.
         *
         * @default false
         */
        allow_ip_domain?: boolean;
        /**
         * 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.
         *
         * @default false
         */
        domain_specific_validation?: boolean;
    }

    /**
     * Check if the string is an email.
     *
     * @param [options] - Options
     */
    function isEmail(str: string, options?: IsEmailOptions): boolean;

    interface IsEmptyOptions {
        /**
         * @default false
         */
        ignore_whitespace?: boolean;
    }

    /**
     * Check if the string has a length of zero.
     *
     * @param [options] - Options
     */
    function isEmpty(str: string, options?: IsEmptyOptions): boolean;

    type FloatLocale =
        | 'en-US'
        | 'ar'
        | 'en-AU'
        | 'en-GB'
        | 'en-HK'
        | 'en-IN'
        | 'en-NZ'
        | 'en-ZA'
        | 'en-ZM'
        | 'ar-AE'
        | 'ar-BH'
        | 'ar-DZ'
        | 'ar-EG'
        | 'ar-IQ'
        | 'ar-JO'
        | 'ar-KW'
        | 'ar-LB'
        | 'ar-LY'
        | 'ar-MA'
        | 'ar-QM'
        | 'ar-QA'
        | 'ar-SA'
        | 'ar-SD'
        | 'ar-SY'
        | 'ar-TN'
        | 'ar-YE'
        | 'bg-BG'
        | 'cs-CZ'
        | 'da-DK'
        | 'de-DE'
        | 'el-GR'
        | 'es-ES'
        | 'fr-FR'
        | 'it-IT'
        | 'ku-IQ'
        | 'hu-HU'
        | 'nb-NO'
        | 'nn-NO'
        | 'nl-NL'
        | 'pl-PL'
        | 'pt-PT'
        | 'ru-RU'
        | 'sl-SI'
        | 'sr-RS@latin'
        | 'sr-RS'
        | 'sv-SE'
        | 'tr-TR'
        | 'uk-UA'
        | 'pt-BR'
        | 'pl-Pl';

    const isFloatLocales: FloatLocale[];

    interface IsFloatOptions {
        /**
         * less or equal
         */
        min?: number;
        /**
         * greater or equal
         */
        max?: number;
        /**
         * greater than
         */
        gt?: number;
        /**
         * less than
         */
        lt?: number;
        /**
         * FloatLocale
         */
        locale?: FloatLocale;
    }

    /**
     * Check if the string is a float.
     *
     * @param [options] - Options
     */
    function isFloat(str: string, options?: IsFloatOptions): boolean;

    interface IsFQDNOptions {
        /**
         * @default true
         */
        require_tld?: boolean;
        /**
         * @default false
         */
        allow_underscores?: boolean;
        /**
         * @default false
         */
        allow_trailing_dot?: boolean;
    }

    /**
     * Check if the string is a fully qualified domain name (e.g. `domain.com`).
     *
     * @param [options] - Options
     */
    function isFQDN(str: string, options?: IsFQDNOptions): boolean;

    /**
     * Check if the string contains any full-width chars.
     */
    function isFullWidth(str: string): boolean;

    /**
     * Check if the string contains any half-width chars.
     */
    function isHalfWidth(str: string): boolean;

    type HashAlgorithm =
        | 'md4'
        | 'md5'
        | 'sha1'
        | 'sha256'
        | 'sha384'
        | 'sha512'
        | 'ripemd128'
        | 'ripemd160'
        | 'tiger128'
        | 'tiger160'
        | 'tiger192'
        | 'crc32'
        | 'crc32b';

    /**
     * Check if the string is a hash of type algorithm.
     *
     * @param algorithm - HashAlgorithm
     */
    function isHash(str: string, algorithm: HashAlgorithm): boolean;

    /**
     * Check if the string is a hexadecimal number.
     */
    function isHexadecimal(str: string): boolean;

    /**
     * Check if the string is a hexadecimal color.
     */
    function isHexColor(str: string): boolean;

    type IdentityCardLocale = 'ES' | 'he-IL' | 'zh-TW';

    /**
     * Check if the string is a valid identity card code.
     *
     * @param [locale="any"] - IdentityCardLocale
     */
    function isIdentityCard(str: string, locale?: 'any' | IdentityCardLocale): boolean;

    /**
     * Check if the string is in a array of allowed values.
     *
     * @param values - Allowed values.
     */
    function isIn(str: string, values: any[]): boolean;

    interface IsIntOptions {
        /**
         * to check the integer min boundary
         */
        min?: number;
        /**
         * to check the integer max boundary
         */
        max?: number;
        /**
         * if `false`, will disallow integer values with leading zeroes
         * @default true
         */
        allow_leading_zeroes?: boolean;
        /**
         * enforce integers being greater than the value provided
         */
        lt?: number;
        /**
         * enforce integers being less than the value provided
         */
        gt?: number;
    }

    /**
     * Check if the string is an integer.
     *
     * @param [options] - Options
     */
    function isInt(str: string, options?: IsIntOptions): boolean;

    /**
     * Check if the string is an IP (version 4 or 6).
     *
     * @param [version] - IP Version
     */
    function isIP(str: string, version?: '4' | '6'): boolean;

    /**
     * Check if the string is an IP Range (version 4 only).
     */
    function isIPRange(str: string): boolean;

    /**
     * Check if the string is an ISBN (version 10 or 13).
     *
     * @param [version] - ISBN Version
     */
    function isISBN(str: string, version?: '10' | '13'): boolean;

    /**
     * Check if the string is an [ISIN](https://en.wikipedia.org/wiki/International_Securities_Identification_Number) (stock/security identifier).
     */
    function isISIN(str: string): boolean;

    /**
     * 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.
     */
    function isISO31661Alpha2(str: string): boolean;

    /**
     * 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.
     */
    function isISO31661Alpha3(str: string): boolean;

    interface IsISO8601Options {
        /**
         * If `strict` is `true`, performs additional checks for valid dates,
         * e.g. invalidates dates like `2009-02-29`.
         *
         * @default false
         */
        strict?: boolean;
    }

    /**
     * Check if the string is a valid [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) date.
     *
     * @param [options] - Options
     */
    function isISO8601(str: string, options?: IsISO8601Options): boolean;

    interface IsISSNOptions {
        /**
         * If `case_sensitive` is `true`, ISSNs with a lowercase `x` as the check digit are rejected.
         *
         * @default false
         */
        case_sensitive?: boolean;
        /**
         * @default false
         */
        require_hyphen?: boolean;
    }

    /**
     * Check if the string is an [ISSN](https://en.wikipedia.org/wiki/International_Standard_Serial_Number).
     *
     * @param [options] - Options
     */
    function isISSN(str: string, options?: IsISSNOptions): boolean;

    /**
     * Check if the string is a [ISRC](https://en.wikipedia.org/wiki/International_Standard_Recording_Code).
     */
    function isISRC(str: string): boolean;

    /**
     * Check if the string is a valid [RFC 3339](https://tools.ietf.org/html/rfc3339) date.
     */
    function isRFC3339(str: string): boolean;

    /**
     * Check if the string is valid JSON (note: uses `JSON.parse`).
     */
    function isJSON(str: string): boolean;

    /**
     * Check if the string is valid JWT token.
     */
    function isJWT(str: string): boolean;

    /**
     * Check if the string is a valid latitude-longitude coordinate in the format:
     *
     * `lat,long` or `lat, long`.
     */
    function isLatLong(str: string): boolean;

    interface IsLengthOptions {
        /**
         * @default 0
         */
        min?: number;
        /**
         * @default undefined
         */
        max?: number;
    }

    /**
     * Check if the string's length falls in a range.
     *
     * Note: this function takes into account surrogate pairs.
     *
     * @param [options] - Options
     */
    function isLength(str: string, options?: IsLengthOptions): boolean;

    /**
     * Check if the string is lowercase.
     */
    function isLowercase(str: string): boolean;

    interface IsMACAddressOptions {
        /**
         * If `no_colons` is `true`, the validator will allow MAC addresses without the colons.
         * Also, it allows the use of hyphens or spaces.
         *
         * e.g. `01 02 03 04 05 ab` or `01-02-03-04-05-ab`.
         *
         * @default false
         */
        no_colons?: boolean;
    }

    /**
     * Check if the string is a MAC address.
     *
     * @param [options] - Options
     */
    function isMACAddress(str: string, options?: IsMACAddressOptions): boolean;

    /**
     * Check if the string is a [magnet uri format](https://en.wikipedia.org/wiki/Magnet_URI_scheme).
     */
    function isMagnetURI(str: string): boolean;

    /**
     * Check if the string is a MD5 hash.
     */
    function isMD5(str: string): boolean;

    /**
     * Check if the string matches to a valid [MIME type](https://en.wikipedia.org/wiki/Media_type) format.
     */
    function isMimeType(str: string): boolean;

    type MobilePhoneLocale =
        | 'ar-AE'
        | 'ar-BH'
        | 'ar-DZ'
        | 'ar-EG'
        | 'ar-IQ'
        | 'ar-JO'
        | 'ar-KW'
        | 'ar-SA'
        | 'ar-SY'
        | 'ar-TN'
        | 'be-BY'
        | 'bg-BG'
        | 'bn-BD'
        | 'cs-CZ'
        | 'da-DK'
        | 'de-DE'
        | 'de-AT'
        | 'el-GR'
        | 'en-AU'
        | 'en-GB'
        | 'en-GG'
        | 'en-GH'
        | 'en-HK'
        | 'en-IE'
        | 'en-IN'
        | 'en-KE'
        | 'en-MT'
        | 'en-MU'
        | 'en-NG'
        | 'en-NZ'
        | 'en-PK'
        | 'en-RW'
        | 'en-SG'
        | 'en-TZ'
        | 'en-UG'
        | 'en-US'
        | 'en-ZA'
        | 'en-ZM'
        | 'es-CL'
        | 'es-ES'
        | 'es-MX'
        | 'es-PA'
        | 'es-PY'
        | 'es-UY'
        | 'et-EE'
        | 'fa-IR'
        | 'fi-FI'
        | 'fj-FJ'
        | 'fo-FO'
        | 'fr-FR'
        | 'fr-GF'
        | 'fr-GP'
        | 'fr-MQ'
        | 'fr-RE'
        | 'he-IL'
        | 'hu-HU'
        | 'id-ID'
        | 'it-IT'
        | 'ja-JP'
        | 'kk-KZ'
        | 'kl-GL'
        | 'ko-KR'
        | 'lt-LT'
        | 'ms-MY'
        | 'nb-NO'
        | 'nl-BE'
        | 'nl-NL'
        | 'nn-NO'
        | 'pl-PL'
        | 'pt-BR'
        | 'pt-PT'
        | 'ro-RO'
        | 'ru-RU'
        | 'sl-SI'
        | 'sk-SK'
        | 'sr-RS'
        | 'sv-SE'
        | 'th-TH'
        | 'tr-TR'
        | 'uk-UA'
        | 'vi-VN'
        | 'zh-CN'
        | 'zh-TW'
        | 'en-CA'
        | 'fr-BE'
        | 'zh-HK';

    const isMobilePhoneLocales: MobilePhoneLocale[];

    interface IsMobilePhoneOptions {
        /**
         * If this is set to `true`, the mobile phone number must be supplied with the country code and therefore must start with `+`.
         *
         * @default false
         */
        strictMode?: boolean;
    }

    /**
     * Check if the string is a mobile phone number.
     *
     * @param [locale] - MobilePhoneLocale(s)
     * @param [options] - Options
     */
    function isMobilePhone(
        str: string,
        locale?: 'any' | MobilePhoneLocale | MobilePhoneLocale[],
        options?: IsMobilePhoneOptions,
    ): boolean;

    /**
     * Check if the string is a valid hex-encoded representation of a [MongoDB ObjectId](http://docs.mongodb.org/manual/reference/object-id/).
     */
    function isMongoId(str: string): boolean;

    /**
     * Check if the string contains one or more multibyte chars.
     */
    function isMultibyte(str: string): boolean;

    interface IsNumericOptions {
        /**
         * If `no_symbols` is true, the validator will reject numeric strings that feature a symbol (e.g. `+`, `-`, or `.`).
         *
         * @default false
         */
        no_symbols?: boolean;
    }

    /**
     * Check if the string contains only numbers.
     *
     * @param [options] - Options
     */
    function isNumeric(str: string, options?: IsNumericOptions): boolean;

    /**
     * Check if the string is a valid octal number.
     */
    function isOctal(str: string): boolean;

    /**
     * Check if the string is a valid port number.
     */
    function isPort(str: string): boolean;

    type PostalCodeLocale =
        | 'AD'
        | 'AT'
        | 'AU'
        | 'BE'
        | 'BG'
        | 'BR'
        | 'CA'
        | 'CH'
        | 'CZ'
        | 'DE'
        | 'DK'
        | 'DZ'
        | 'EE'
        | 'ES'
        | 'FI'
        | 'FR'
        | 'GB'
        | 'GR'
        | 'HR'
        | 'HU'
        | 'ID'
        | 'IE'
        | 'IL'
        | 'IN'
        | 'IS'
        | 'IT'
        | 'JP'
        | 'KE'
        | 'LI'
        | 'LT'
        | 'LU'
        | 'LV'
        | 'MX'
        | 'MT'
        | 'NL'
        | 'NO'
        | 'NZ'
        | 'PL'
        | 'PR'
        | 'PT'
        | 'RO'
        | 'RU'
        | 'SA'
        | 'SE'
        | 'SI'
        | 'SK'
        | 'TN'
        | 'TW'
        | 'UA'
        | 'US'
        | 'ZA'
        | 'ZM';

    const isPostalCodeLocales: PostalCodeLocale[];

    /**
     * Check if the string is a postal code
     *
     * @param locale - PostalCodeLocale
     */
    function isPostalCode(str: string, locale: 'any' | PostalCodeLocale): boolean;

    /**
     * Check if the string contains any surrogate pairs chars.
     */
    function isSurrogatePair(str: string): boolean;

    interface IsURLOptions {
        /**
         * @default ['http','https','ftp']
         */
        protocols?: string[];
        /**
         * @default true
         */
        require_tld?: boolean;
        /**
         * @default false
         */
        require_protocol?: boolean;
        /**
         * @default true
         */
        require_host?: boolean;
        /**
         * @default true
         */
        require_valid_protocol?: boolean;
        /**
         * @default false
         */
        allow_underscores?: boolean;
        /**
         * @default false
         */
        host_whitelist?: Array<string | RegExp>;
        /**
         * @default false
         */
        host_blacklist?: Array<string | RegExp>;
        /**
         * @default false
         */
        allow_trailing_dot?: boolean;
        /**
         * @default false
         */
        allow_protocol_relative_urls?: boolean;
        /**
         * @default false
         */
        disallow_auth?: boolean;
    }

    /**
     * Check if the string is an URL.
     *
     * @param [options] - Options
     */
    function isURL(str: string, options?: IsURLOptions): boolean;

    /**
     * Check if the string is uppercase.
     */
    function isUppercase(str: string): boolean;

    /**
     * Check if the string is a UUID (version 3, 4 or 5).
     *
     * @param [version="all"] - UUID version
     */
    function isUUID(str: string, version?: 3 | 4 | 5 | '3' | '4' | '5' | 'all'): boolean;

    /**
     * Check if the string contains a mixture of full and half-width chars.
     */
    function isVariableWidth(str: string): boolean;

    /**
     * Checks characters if they appear in the whitelist.
     *
     * @param chars - whitelist
     */
    function isWhitelisted(str: string, chars: string | string[]): boolean;

    /**
     * Check if string matches the pattern.
     *
     * @param pattern - `/foo/i`
     */
    function matches(str: string, pattern: RegExp): boolean;
    /**
     * Check if string matches the pattern.
     *
     * @param pattern - `'foo'`
     * @param [modifiers] - `'i'`
     */
    function matches(str: string, pattern: string, modifiers?: string): boolean;

    /**
     * Check if the string is of type slug.
     */
    function isSlug(str: string): boolean;

    /******************
     *** Sanitizers ***
     ******************/

    /**
     * Remove characters that appear in the blacklist.
     *
     * @param chars - The characters are used in a `RegExp` and so you will need to escape some chars, e.g. `blacklist(input, '\\[\\]')`.
     */
    function blacklist(input: string, chars: string): string;

    /**
     * Replace `<`, `>`, `&`, `'`, `"` and `/` with HTML entities.
     */
    function escape(input: string): string;

    /**
     * Replaces HTML encoded entities with `<`, `>`, `&`, `'`, `"` and `/`.
     */
    function unescape(input: string): string;

    /**
     * Trim characters from the left-side of the input.
     *
     * @param [chars] - characters (defaults to whitespace)
     */
    function ltrim(input: string, chars?: string): string;

    interface NormalizeEmailOptions {
        /**
         * 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.
         *
         * @default true
         */
        all_lowercase?: boolean;
        /**
         * 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.
         *
         * @default true
         */
        gmail_lowercase?: boolean;
        /**
         * Removes dots from the local part of the email address, as GMail ignores them
         * (e.g. `"john.doe"` and `"johndoe"` are considered equal).
         *
         * @default true
         */
        gmail_remove_dots?: boolean;
        /**
         * Normalizes addresses by removing "sub-addresses", which is the part following a `"+"` sign
         * (e.g. `"foo+bar@gmail.com"` becomes `"foo@gmail.com"`).
         *
         * @default true
         */
        gmail_remove_subaddress?: boolean;
        /**
         * Converts addresses with domain `@googlemail.com` to `@gmail.com`, as they're equivalent.
         *
         * @default true
         */
        gmail_convert_googlemaildotcom?: boolean;
        /**
         * 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.
         *
         * @default true
         */
        outlookdotcom_lowercase?: boolean;
        /**
         * Normalizes addresses by removing "sub-addresses", which is the part following a `"+"` sign
         * (e.g. `"foo+bar@outlook.com"` becomes `"foo@outlook.com"`).
         *
         * @default true
         */
        outlookdotcom_remove_subaddress?: boolean;
        /**
         * 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.
         *
         * @default true
         */
        yahoo_lowercase?: boolean;
        /**
         * Normalizes addresses by removing "sub-addresses", which is the part following a `"-"` sign
         * (e.g. `"foo-bar@yahoo.com"` becomes `"foo@yahoo.com"`).
         *
         * @default true
         */
        yahoo_remove_subaddress?: boolean;
        /**
         * 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.
         *
         * @default true
         */
        icloud_lowercase?: boolean;
        /**
         * Normalizes addresses by removing "sub-addresses", which is the part following a `"+"` sign
         * (e.g. `"foo+bar@icloud.com"` becomes `"foo@icloud.com"`).
         *
         * @default true
         */
        icloud_remove_subaddress?: boolean;
    }

    /**
     * Canonicalizes an email address. (This doesn't validate that the input is an email, if you want to validate the email use `isEmail` beforehand)
     *
     * @param [options] - Options
     */
    function normalizeEmail(email: string, options?: NormalizeEmailOptions): string | false;

    /**
     * Trim characters from the right-side of the input.
     *
     * @param [chars] - characters (defaults to whitespace)
     */
    function rtrim(input: string, chars?: string): string;

    /**
     * Remove characters with a numerical value < `32` and `127`, mostly control characters.
     * Unicode-safe in JavaScript.
     *
     * @param [keep_new_lines=false] - if `true`, newline characters are preserved (`\n` and `\r`, hex `0xA` and `0xD`).
     */
    function stripLow(input: string, keep_new_lines?: boolean): string;

    /**
     * Convert the input string to a boolean.
     * Everything except for `'0'`, `'false'` and `''` returns `true`.
     *
     * @param [strict=false] - in `strict` mode, only `'1'` and `'true'` return `true`.
     */
    function toBoolean(input: string, strict?: boolean): boolean;

    /**
     * Convert the input string to a `Date`, or `null` if the input is not a date.
     */
    function toDate(input: string): Date | null;

    /**
     * Convert the input string to a float, or `NaN` if the input is not a float.
     */
    function toFloat(input: string): number;

    /**
     * Convert the input string to an integer, or `NaN` if the input is not an integer.
     *
     * @param [radix=10] - radix or base (defaults to 10)
     */
    function toInt(input: string, radix?: number): number;

    /**
     * Trim characters from both sides of the input.
     *
     * @param [chars] - characters (defaults to whitespace)
     */
    function trim(input: string, chars?: string): string;

    /**
     * Remove characters that do not appear in the whitelist.
     *
     * @param chars - The characters are used in a `RegExp` and so you will need to escape some chars, e.g. `whitelist(input, '\\[\\]')`.
     */
    function whitelist(input: string, chars: string): string;

    /**
     * Converts to string.
     */
    function toString(input: any): string;
}
export default validator;