Combining useState and useEffect for Dynamic Interactions

In real-world applications, components often need to manage their internal state and respond to external factors like user input, fetched data, or timers. By combining useState and useEffect, we can create fully interactive, dynamic components that manage both state and side effects seamlessly.

Building a dynamic search component

Let’s build a dynamic search component step by step, to appreciate how useState and useEffect work independently and then together to create a fully functional feature.

We need to build a dynamic search component that allows users to type a query into an input field and see a filtered list of items in real time. Additionally, the items should be fetched dynamically when the component loads, simulating a common feature in modern applications like product or user searches.

Step 1: Start with a static list

Let’s begin by rendering a static list of items. This step shows how we can use JSX to display a simple list in React.