# joi #### The most powerful schema description language and data validator for JavaScript. ## Installation `npm install joi` ### Visit the [joi.dev](https://joi.dev) Developer Portal for tutorials, documentation, and support ## Useful resources - [Documentation and API](https://joi.dev/api/) - [Versions status](https://joi.dev/resources/status/#joi) - [Changelog](https://joi.dev/resources/changelog/) - [Project policies](https://joi.dev/policies/)