@yozora/invariant
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 @yozora/invariant
-
yarn
yarn add @yozora/invariant
Usage
-
Syntax
function invariant( condition: boolean, message?: string | (() => string), ): asserts condition
-
Demo
import invariant from '@yozora/invariant' invariant(typeof window !== 'undefined', '`window` is not defined.') invariant(typeof window !== 'undefined', () => '`window` is not defined:' + window)