Validator

Check if a date is a weekday

Check if a character is a digit

Check if a date is a weekend

Check if a date is between two dates

Check if a date is today

Check if a date occurs in the current year

Check if a flat array has duplicate values

Check if a number is in a given range

Check if a number is a power of 2

Check if a number is negative

Check if a number is even

Check if a number is odd

Check if a given integer is a prime number

Check if a number is positive

Check if a string contains only ASCII characters

Check if a string contains only digits

Check if a string contains lower case characters

Check if a string contains only letters

Check if a string contains only letters and numbers

Check if a string contains upper case characters

Check if a string contains whitespace

Check if a string is a hexadecimal color

Check if a string is a hexadecimal number

Check if a string is an octal number

Check if a string is a MongoDB ObjectId

Check if a string is upper case

Check if a string is lower case

Check if a value is a plain object

Check if a value is a number

Check if a value is a business identifier code

Check if a value is a string

Check if a value is a regular expression

Check if a value is an object

Check if a value is base32 encoded

Check if a value is base58 encoded

Check if a value is nil

Check if a value is base64 encoded

Check if a year is leap year

Check if all array elements are equal to a given value

Check if all items in an array are equal

Check if an array is not empty

Check if an array contains a value matching some criterias

Check if an array is subset of other array

Check if an object is an array

Check if an object is a Promise

Check if an object is empty

Validate a Gregorian date