Move validation messages to the component class in reactive form

Описание: In this video we will discuss, how to move validation messages to the component class.

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There are several benefits to this

1. Easily unit test validation logic

2. Instead of hard-coding validation messages in the application, we can load them from an external source like a database or a file.

3. Change validation dynamically at run-time based on the decisions made in code or user selections

In this video let's move the validation messages to the component class and in our next video we will discuss moving the logic to show and hide these messages.