Getting Started with React Hooks: UseState and UseEffect

React Hooks, introduced in React 16.8, provide a way to use state and other React features in functional components without writing a class. Before Hooks, functional components were limited to presenting data passed via props. With the addition of Hooks, developers can manage component state, handle side effects, and reuse logic across components more easily. Two of the most fundamental Hooks are useState and useEffect, which together cover many common requirements in modern React applications.

Understanding how these Hooks work individually and in combination forms the foundation for building interactive and dynamic interfaces. This article explains the mechanics of useState and useEffect, focusing on their usage patterns, behavior, and considerations. Each Hook serves a distinct purpose: useState handles local component state, while useEffect manages side effects such as data fetching, subscriptions, or manual DOM manipulations. By the end, readers should have a clear mental model of how these Hooks operate within the React rendering lifecycle.