Understanding State

Introduction to the State parameter

The typical callback function structure that we’ve used so far contains one or more Output elements and one or more Input elements. The callbacks fire immediately when users modify an Input element. We want to relax this option a little.

We’ll start with a simple example demonstrating why and how to use State, which is an optional argument that can be given to our callbacks.

To make the problem we’re trying to solve clear, take a look at the illustration below: