Combining useState and useEffect for Dynamic Interactions
Explore how to use React 19 hooks useState and useEffect together to create interactive components that manage state and side effects. Learn to build a dynamic search feature, manage timers, and track user input for real-time updates.
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In real-world applications, components often need to manage their internal state and respond to external factors, such as 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, such as product or user searches.
Step 1: Start with a static list
Let’s begin by rendering a static list of items. This step demonstrates how to use JSX to display a simple list in React.