Validator

Check if a character is a digit

Check if a date is a weekday

Check if a date is a weekend

Check if a date is today

Check if a date is between two dates

Check if a date occurs in the current year

Check if a flat array has duplicate values

Check if a number is a power of 2

Check if a number is even

Check if a number is in a given range

Check if a given integer is a prime number

Check if a number is negative

Check if a number is odd

Check if a number is positive

Check if a string contains lower case characters

Check if a string contains only ASCII characters

Check if a string contains only digits

Check if a string contains only letters and numbers

Check if a string contains whitespace

Check if a string contains only letters

Check if a string contains upper case characters

Check if a string is a hexadecimal color

Check if a string is a MongoDB ObjectId

Check if a string is an octal number

Check if a string is lower case

Check if a string is upper case

Check if a value is a number

Check if a value is a business identifier code

Check if a value is a regular expression

Check if a value is a plain object

Check if a value is an object

Check if a string is a hexadecimal number

Check if a value is a string

Check if a value is base32 encoded

Check if a value is base58 encoded

Check if a value is base64 encoded

Check if a year is leap year

Check if a value is nil

Check if an array contains a value matching some criterias

Check if an array is not empty

Check if all items in an array are equal

Check if an array is subset of other array

Check if an object is a Promise

Check if all array elements are equal to a given value

Check if an object is an array

Check if an object is empty

Validate a Gregorian date