@kakekomu/result-type v1.3.1

Result

Result type for error handling. This is a frequently used approach for handling results of side effects in functinal languages, sometimes called an Either type.

Result is an union type.

type Result<err, val> = Err<err> | Ok<val>

Under the hood, these four types are simple objects with a type field. You can use a switch or if statement to get the wrapped value (see the example below).