What is Joi, and Why is It Essential for Form Validation?
Joi is a powerful, schema-based validator for JavaScript. Created by the Hapi team, it’s designed to validate JavaScript objects efficiently. With Joi, you can define rules for inputs, such as requiring a specific data type, setting constraints on length, format, and even complex rules like regular expressions. This flexibility makes Joi ideal for managing form data and ensuring that only valid information is passed to your server.
Setting Up Joi for Form Validation
To start using Joi in your project, you first need to install it. You can do this easily with npm: