Elegant data validation with Vest
Blog post from LogRocket
Vest is a versatile JavaScript data validation library inspired by modern testing frameworks like Mocha and Jest, offering a code-testing-like approach to validating form data. As a framework-agnostic tool, Vest can be easily integrated into different coding environments without requiring form serialization methods, supporting both vanilla JavaScript and frameworks like React for data collection. It allows developers to create validation functions, known as "suits," to test input data, providing methods to handle validation results, check for errors or warnings, and respond to user inputs dynamically. Vest supports advanced features such as grouping tests, skipping or executing tests conditionally, and performing asynchronous validation, which is useful for real-time user input validation or server-side checks. Additionally, enforcement rules in Vest can be extended or customized, and the library offers a classNames() function to dynamically update UI elements based on validation states, enhancing both functionality and user experience.