Jojen is an updated take on Joi's API. Joi has a very pleasant and fluent API, however it suffers from relatively poor performance, lacks language support, doesn't allow user-defined validation functions, and doesn't work well in a Browserify/Webpack frontend.

Jojens goals are to:

• Mostly match the Joi API with very few inconsistencies (see compatibility)
• Fixes the inconsistent parts of Joi (again, see compatibility)
• Perform reasonably well (at least 18x faster than Joi in all cases, see bench output) in a reasonably small package (currently 13.5 KB)
• Support browsers, user-defined validations, and internationalisation.