is-number
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
is-extendable
Returns true if a value is a plain object, array or function.
is-data-descriptor
Returns true if a value has the characteristics of a valid JavaScript data descriptor.
is-descriptor
Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for data descriptors and accessor descriptors.
kind-of
Get the native type of a value.
