@guanghechen/invariant
v6.0.0-alpha.1
Published
Invariant function
Downloads
2,258
Readme
An invariant function, which takes a condition
and a optional message
value,
and throw an error when the given condition fails.
Install
npm
npm install --save @guanghechen/invariant
yarn
yarn add @guanghechen/invariant
Usage
Syntax
function invariant( condition: boolean, message?: string | (() => string), ): asserts condition
Demo
import invariant from '@guanghechen/invariant' invariant(typeof window !== 'undefined', '`window` is not defined.') invariant(typeof window !== 'undefined', () => '`window` is not defined:' + window)