Use of lenght validator.

Summary

How to use lenght validator in an input field.

Content

Hi, i´d like to know if you can guide me in the process on validating an input field that the user must fill, and i need this user to write a minimum of 3 characters. My question is, what do i have to write in the following options: validators.type and validators.options (inside validators sub properties). I tried to look for it over the internet with no success. Thank you very much in advance!