Top 8 web backend Data validation libraries for validating user input, their popularity, URL, and description
1. Joi (https://github.com/hapijs/joi): Popular object schema validation library for Node.js with a fluent API for defining schemas and powerful validation logic.
2. Vuelidate (https://vuelidate.js.org/): Simple, lightweight model-based validation for Vue.js applications with a straightforward syntax and intuitive API that makes it easy to get started quickly and scale up as needed.
4. ValidatorJS (https://github.com/skaterdav85/validatorjs): A library of string validators and sanitizers that can be used to validate user input in web forms or other data sources such as JSON objects
5. express-validator (https://express-validator.github.io/docs/): An express middleware module that provides robust data validation capabilities for Express applications using the popular Joi library
7. Zod (https://zod.dev/ ): A TypeScript-based runtime type system that allows you to define complex types using an expressive syntax while providing compile-time type safety checks
8. Superstruct ( https://github.com/ianstormtaylor/superstruct ): A tiny library for creating strongly typed data structures with an intuitive syntax