Package Exports

outvariant

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (outvariant) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

`outvariant`

Why?

Type-safe implementation of invariant. Asserts the given predicate expression so it's treated as non-nullable after the invariant call:

// Regular "invariant":
invariant(user, 'Failed to fetch')
user?.firstName // "user" is possibly undefined

// The glorious "outvariant":
invariant(user, 'Failed to fetch')
user.firstName // OK, "user" exists at this point

Positionals support.

invariant(predicate, 'Expected %s but got %s', 'one', false)

Getting started

npm install outvariant
# or
yarn add outvariant

import { invariant } from 'outvariant'

invariant(user, 'Failed to load: expected user, but got %o', user)