Related modules: 
This is an extension of lodash with extra isXxxx methods from the Checkit module, along with is...Case methods derived from the lodash case conversion methods. All functions have corresponding isNotXxxx methods as well.
| Name | From |
|---|---|
| isAlpha | checkit "alpha" regex /^[a-z]+$/i |
| isAlphaDash | checkit "alphaDash" regex /^[a-z0-9_-]+$/i |
| isAlphaNumeric | checkit "alphaNumeric" regex /^[a-z0-9]+$/i |
| isAlphaUnderscore | checkit "alphaUnderscore" regex /^[a-z0-9_]+$/i |
| isArguments | lodash isArguments |
| isArray | lodash isArray |
| isArrayBuffer | lodash isArrayBuffer |
| isArrayLike | lodash isArrayLike |
| isArrayLikeObject | lodash isArrayLikeObject |
| isBase64 | checkit "base64" regex /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$/ |
| isBetween | checkit validator between |
| isBoolean | lodash isBoolean |
| isBuffer | lodash isBuffer |
| isCamelCase | lodash camelCase |
| isContainerFor | checkit validator contains |
| isDate | lodash isDate |
| isDifferent | checkit validator different |
| isElement | lodash isElement |
| isEmail | checkit "email" regex /^(.+)@(.+).(.+)$/i |
| isEmpty | lodash isEmpty |
| isEqual | lodash isEqual |
| isEqualWith | lodash isEqualWith |
| isError | lodash isError |
| isExactLength | checkit validator exactLength |
| isExists | checkit validator exists |
| isFinite | lodash isFinite |
| isFunction | lodash isFunction |
| isGreaterThan | checkit validator greaterThan |
| isGreaterThanEqualTo | checkit validator greaterThanEqualTo |
| isInRange | checkit validator range |
| isInteger | lodash isInteger |
| isIpv4 | checkit "ipv4" regex /^((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2}).){3}(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[0-9]{1,2})$/i |
| isIpv6 | checkit "ipv6" regex /^((?=.::)(?!.::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5]).?\b){4})$/i |
| isKebabCase | lodash kebabCase |
| isLength | lodash isLength |
| isLessThan | checkit validator lessThan |
| isLessThanEqualTo | checkit validator lessThanEqualTo |
| isLowerCase | lodash lowerCase |
| isLuhn | checkit "luhn" regex /^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6(?:011|5[0-9][0-9])[0-9]{12}|3[47][0-9]{13}|3(?:0[0-5]|[68][0-9])[0-9]{11}|(?:2131|1800|35\d{3})\d{11})$/ |
| isMap | lodash isMap |
| isMatch | lodash isMatch |
| isMatchWith | lodash isMatchWith |
| isMaxLength | checkit validator maxLength |
| isMinLength | checkit validator minLength |
| isNaN | lodash isNaN |
| isNative | lodash isNative |
| isNatural | checkit "natural" regex /^[0-9]+$/i |
| isNaturalNonZero | checkit "naturalNonZero" regex /^[1-9][0-9]*$/i |
| isNil | lodash isNil |
| isNotAlpha | not "isAlpha" |
| isNotAlphaDash | not "isAlphaDash" |
| isNotAlphaNumeric | not "isAlphaNumeric" |
| isNotAlphaUnderscore | not "isAlphaUnderscore" |
| isNotBase64 | not "isBase64" |
| isNotBetween | not "isBetween" |
| isNotCamelCase | not "isCamelCase" |
| isNotContainerFor | not "isContainerFor" |
| isNotDifferent | not "isDifferent" |
| isNotEmail | not "isEmail" |
| isNotExactLength | not "isExactLength" |
| isNotExists | not "isExists" |
| isNotGreaterThan | not "isGreaterThan" |
| isNotGreaterThanEqualTo | not "isGreaterThanEqualTo" |
| isNotInRange | not "isInRange" |
| isNotIpv4 | not "isIpv4" |
| isNotIpv6 | not "isIpv6" |
| isNotKebabCase | not "isKebabCase" |
| isNotLessThan | not "isLessThan" |
| isNotLessThanEqualTo | not "isLessThanEqualTo" |
| isNotLowerCase | not "isLowerCase" |
| isNotLuhn | not "isLuhn" |
| isNotMaxLength | not "isMaxLength" |
| isNotMinLength | not "isMinLength" |
| isNotNatural | not "isNatural" |
| isNotNaturalNonZero | not "isNaturalNonZero" |
| isNotNumeric | not "isNumeric" |
| isNotRequired | not "isRequired" |
| isNotSnakeCase | not "isSnakeCase" |
| isNotStartCase | not "isStartCase" |
| isNotUpperCase | not "isUpperCase" |
| isNotUrl | not "isUrl" |
| isNotUuid | not "isUuid" |
| isNull | lodash isNull |
| isNumber | lodash isNumber |
| isNumeric | checkit validator numeric |
| isObject | lodash isObject |
| isObjectLike | lodash isObjectLike |
| isPlainObject | lodash isPlainObject |
| isRegExp | lodash isRegExp |
| isRequired | checkit validator required |
| isSafeInteger | lodash isSafeInteger |
| isSet | lodash isSet |
| isSnakeCase | lodash snakeCase |
| isStartCase | lodash startCase |
| isString | lodash isString |
| isSymbol | lodash isSymbol |
| isTypedArray | lodash isTypedArray |
| isUndefined | lodash isUndefined |
| isUpperCase | lodash upperCase |
| isUrl | checkit "url" regex /^((http|https)://(\w+:{0,1}\w*@)?(\S+)|)(:[0-9]+)?(/|/([\w#!:.?+=&%@!-/]))?$/ |
| isUuid | checkit "uuid" regex /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i |
| isWeakMap | lodash isWeakMap |
| isWeakSet | lodash isWeakSet |