Handling Errors in TextFields (e.g., Invalid Email Input)

[jeromelaban]

From @InfographieCarrera in #19548:

We also need to understand the best approach for handling validation errors in TextFields. For example:

• If a user enters an incorrect email format, how does Uno Platform handle error states?
• Can these error messages and UI states be defined within Figma, or must they be handled strictly through code?
• Are there built-in validation methods, or do we need to implement custom validation logic?

[jeromelaban]

Thanks for the question.

WinUI does not provide out of the box validation mechanisms, though we provide validation extensions to ease the creation of fields validation. The MVVM community toolkit's support is another option.