Validating user input is a crucial aspect of building a user-friendly and error-free interface. However, it should not be overly complicated, as the primary goal is to notify the user of incorrect input. This can be achieved by displaying error messages, highlighting fields, and enabling/disabling certain actions.

One common approach to implementing validation is to create custom components, but this method also has its drawbacks. In this article, we will explore several options for validating user input and demonstrate how to cover it with tests.

Validating user input is essential to prevent errors and provide a seamless user experience. By following the guidelines outlined in this article, developers can create robust and user-friendly interfaces that efficiently handle user input.