isNone

isNone(value)

Checks if a value is null or undefined. Returns true if the value is either null or undefined, otherwise returns false.

data-first

isNone(null); // true
isNone(undefined); // true
isNone(0); // false
isNone(""); // false

data-last

pipe(null, isNone()); // true
pipe(undefined, isNone()); // true
pipe(0, isNone()); // false
pipe("", isNone()); // false