Package Exports

@octetstream/invariant

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Readme

@octetstream/invariant

Declarative errors throwing for Node.js

API

This library have a two, a little bit different APIs:

invatiant(predicate, message[...format])

boolean predicate – a result of some condition
string message – an error message
any format – see more about the format in a sprintf-js documentation

invariant(predicate, Error, message[, ...format])

Function Error – custom error class that will be used as an error constructor

Example

  import invariant from "@octetstream/invariant"

  // some of your code...

  // Will threw a TypeError
  invariant(typeof foo === "string", TypeError, "Foo should be a string, but given type is: %s", typeof foo)