IS Packages

Check if a Buffer/Uint8Array is a BPG image

Express Validator for array to check if cotains only boolean values

Determine if an item is contained in a list.

Check if a Buffer/Uint8Array is a MIDI file

Check if a URL is local or not

Check if a string is LRC

check if a function is is-is-odd

check if a function is is-is-odd

Check if a Buffer/Uint8Array is an ISO image

A one-liner to check if a property is set (not null, undefined or empty string).

Check if a Buffer/Uint8Array is a MOV file

Check if an integer is narcissistic.

Check if a Buffer/Uint8Array is a MKV video

Check that given `name` or `user/repo` exists in npm registry or in github as user repository.

Checks if useragent is iOS

Checks if useragent is weixin browser

Validate GitHub webhook events.

Check if a string is valid ip address

Returns true if a year is valid based on a given year, range of years, sequences of years, or any mixture of these.

Check if array is 2D