yVal

yVal is a JavaScript library designed for data validation. It provides a simple and declarative way to define validation rules for JavaScript objects and their properties. The primary goal of yVal is to make the process of validating data structures efficient and easy to manage, especially in applications dealing with user input or data coming from external sources.

The library uses a JSON-like schema to define validation rules. These schemas specify expected data types, required fields, patterns (using regular expressions), minimum and maximum values, and custom validation logic. yVal can validate primitive types like strings, numbers, and booleans, as well as complex structures such as arrays and nested objects.

When validation is performed, yVal returns a detailed report of any errors found, including the path to the invalid property and the specific rule that was violated. This makes it straightforward to identify and correct data issues. The library is lightweight and has minimal dependencies, making it suitable for use in both browser-based and Node.js environments. Its straightforward API allows developers to integrate validation logic quickly into their projects without a steep learning curve.