Text Validate Dynamic Action

Hi.
I have a text box and a button. I have some validations in place on the text box and a button click dynamic event. I am not using a form & submit button because I need to redirect to a custom URL.

In the click event of button, I have 2 actions - validate text box & browser goto (with custom URL).
When the validation fails, browser goto still executes. So I have two questions:

1. What is the purpose of this validate action… where/how is it used if not this way?
2. Is there any way to achieve this in Wappler besides custom JS?