Joi

Joi is a JavaScript library used for validating data, such as user input or API requests. It allows developers to define specific rules and formats that data must meet, ensuring that it’s correct and safe to use within an application. For example, Joi can check if an email address is valid, a password is strong enough, or required fields are filled out. By centralizing validation logic, Joi helps improve code readability, reduces errors, and enhances security, making it easier to build reliable web applications.