Validator.js is a library of pure, stateless functions designed for the validation and sanitization of string data within any JavaScript environment. It provides a modular suite of tools to verify that user-provided information conforms to specific formats, such as emails, URLs, and dates, while simultaneously cleaning untrusted input to mitigate security risks.
The library distinguishes itself through a design that avoids platform-specific APIs, ensuring consistent execution across browsers, servers, and edge runtimes. By utilizing a pre-compiled regular expression engine and a pure data transformation pipeline, it maintains predictable performance and side-effect-free processing for all string analysis tasks.
The project covers a broad range of data integrity requirements, including the normalization of web form submissions and the enforcement of constraints for incoming API requests. These utilities assist in preventing injection attacks and cross-site scripting by filtering and escaping dangerous characters before data is processed or rendered.
