default falsey locale to 'any' in isMobilePhone

README.md

@@ -103,7 +103,7 @@ Validator                               | Description
 **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.
 **isMD5(str)**                          | check if the string is a MD5 hash.
 **isMimeType(str)**                     | check if the string matches to a valid [MIME type](https://en.wikipedia.org/wiki/Media_type) format
-**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', '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', 'sk-SK', 'sr-RS', 'sv-SE', 'th-TH', 'tr-TR', 'uk-UA', 'vi-VN', 'zh-CN', 'zh-HK', 'zh-TW']` OR 'any'. If 'any' 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 `+`.
+**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', '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', '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 `+`.
 **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.<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 `.`).

lib/isMobilePhone.js

@@ -102,7 +102,8 @@ function isMobilePhone(str, locale, options) {
     });
   } else if (locale in phones) {
     return phones[locale].test(str);
-  } else if (locale === 'any') {
+    // alias falsey locale as 'any'
+  } else if (!locale || locale === 'any') {
     for (var key in phones) {
       if (phones.hasOwnProperty(key)) {
         var phone = phones[key];

src/lib/isMobilePhone.js

@@ -91,7 +91,8 @@ export default function isMobilePhone(str, locale, options) {
     });
   } else if (locale in phones) {
     return phones[locale].test(str);
-  } else if (locale === 'any') {
+    // alias falsey locale as 'any'
+  } else if (!locale || locale === 'any') {
     for (const key in phones) {
       if (phones.hasOwnProperty(key)) {
         const phone = phones[key];

test/validators.js

@@ -4435,6 +4435,20 @@ describe('Validators', () => {
       ],
       args: ['any', { strictMode: true }],
     });
+
+    // falsey locale defaults to 'any'
+    test({
+      validator: 'isMobilePhone',
+      valid: allValid,
+      invalid: [
+        '',
+        'asdf',
+        '1',
+        'ASDFGJKLmZXJtZtesting123',
+        'Vml2YW11cyBmZXJtZtesting123',
+      ],
+      args: [],
+    });
   });
 
   it('should validate currency', () => {

validator.js

@@ -1122,7 +1122,8 @@ function isMobilePhone(str, locale, options) {
     });
   } else if (locale in phones) {
     return phones[locale].test(str);
-  } else if (locale === 'any') {
+    // alias falsey locale as 'any'
+  } else if (!locale || locale === 'any') {
     for (var key in phones) {
       if (phones.hasOwnProperty(key)) {
         var phone = phones[key];