How to handle data validation in Node.js using validatorjs

Validatorjs, a JavaScript validation library inspired by Laravel's validator, simplifies input validation for backend APIs built with Node.js by offering readable, declarative validation rules and multilingual error support. The article provides a comprehensive guide on implementing basic and advanced validation techniques using validatorjs, including installation and integration with Express, MongoDB, and other Node.js tools. It demonstrates basic input validation through a signup function, using rules such as "required," "string," and "email," and explains advanced use cases like implementing strict password policies and ensuring unique attributes via asynchronous database calls. Additionally, the article suggests using LogRocket to monitor network requests and enhance user experience by replaying user sessions and capturing errors, thus ensuring more robust application performance.