How to get access in the method to the object that I form in the render and make a check?

Question

React

A question. I have an object. It is formed in the render. and in the same place I do the check
const isFormValid = values(personalDataValidationStateOnFocus).every(
state => state === null
);
I also have a form onSubmit method. And there, inside this method, you need to check if isFormValid === true, then send data
. How can I implement this? I wanted to create some other variable in the state and change it in the render (set true if isFormValid = true), but this does not work and is incorrect.