Closes [#952](#952)

index.js

@@ -153,6 +153,8 @@ var _isWhitelisted = _interopRequireDefault(require("./lib/isWhitelisted"));
 
 var _normalizeEmail = _interopRequireDefault(require("./lib/normalizeEmail"));
 
+var _isSlug = _interopRequireDefault(require("./lib/isSlug"));
+
 function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
@@ -239,7 +241,8 @@ var validator = {
   blacklist: _blacklist.default,
   isWhitelisted: _isWhitelisted.default,
   normalizeEmail: _normalizeEmail.default,
-  toString: toString
+  toString: toString,
+  isSlug: _isSlug.default
 };
 var _default = validator;
 exports.default = _default;

lib/isSlug.js

@@ -0,0 +1,24 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = isSlug;
+
+var _assertString = _interopRequireDefault(require("./util/assertString"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+var charset = '^([a-z0-9\\-]{1,})$';
+
+function isSlug(str) {
+  (0, _assertString.default)(str);
+  var regex_charset = new RegExp("".concat(charset));
+  var regex_boundaries_consecutive = /[-_]{2,}/;
+  var regex_boundaries_leading = /^[-_]/;
+  var regex_boundaries_trailing = /[-_]$/;
+  return regex_charset.test(str) && !regex_boundaries_consecutive.test(str) && !regex_boundaries_leading.test(str) && !regex_boundaries_trailing.test(str);
+}
+
+module.exports = exports.default;
+module.exports.default = exports.default;

src/index.js

@@ -97,6 +97,8 @@ import isWhitelisted from './lib/isWhitelisted';
 
 import normalizeEmail from './lib/normalizeEmail';
 
+import isSlug from './lib/isSlug';
+
 const version = '11.1.0';
 
 const validator = {
@@ -181,6 +183,7 @@ const validator = {
   isWhitelisted,
   normalizeEmail,
   toString,
+  isSlug,
 };
 
 export default validator;

src/lib/isSlug.js

@@ -0,0 +1,19 @@
+import assertString from './util/assertString';
+
+let charset = '^([a-z0-9\\-]{1,})$';
+
+export default function isSlug(str) {
+  assertString(str);
+
+  let regex_charset = new RegExp(`${charset}`);
+  let regex_boundaries_consecutive = /[-_]{2,}/;
+  let regex_boundaries_leading = /^[-_]/;
+  let regex_boundaries_trailing = /[-_]$/;
+
+  return (
+    regex_charset.test(str) &&
+    !regex_boundaries_consecutive.test(str) &&
+    !regex_boundaries_leading.test(str) &&
+    !regex_boundaries_trailing.test(str)
+  );
+}

test/validators.js

@@ -6910,4 +6910,13 @@ describe('Validators', () => {
       ],
     });
   });
+
+  it('should validate slug', () => {
+    test({
+      validator: 'isSlug',
+      args: ['cs_67CZ'],
+      valid: ['cs-cz', 'cscz'],
+      invalid: ['cs--------CZ12 ', '@#_$@'],
+    });
+  });
 });

validator.js

@@ -2027,6 +2027,16 @@ function normalizeEmail(email, options) {
   return parts.join('@');
 }
 
+var charset = '^([a-z0-9\\-]{1,})$';
+function isSlug(str) {
+  assertString(str);
+  var regex_charset = new RegExp("".concat(charset));
+  var regex_boundaries_consecutive = /[-_]{2,}/;
+  var regex_boundaries_leading = /^[-_]/;
+  var regex_boundaries_trailing = /[-_]$/;
+  return regex_charset.test(str) && !regex_boundaries_consecutive.test(str) && !regex_boundaries_leading.test(str) && !regex_boundaries_trailing.test(str);
+}
+
 var version = '11.1.0';
 var validator = {
   version: version,
@@ -2109,7 +2119,8 @@ var validator = {
   blacklist: blacklist$1,
   isWhitelisted: isWhitelisted,
   normalizeEmail: normalizeEmail,
-  toString: toString
+  toString: toString,
+  isSlug: isSlug
 };
 
 return validator;