Useeffect Hooks (part-2)

By Author: jatin
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In this blog post, we explore how to fetch and display multiple users' data in a React application using the useEffect hook. We walk through setting up the component, making an API request to JSONPlaceholder, storing the data using useState, and rendering it dynamically in a table. Additionally, we discuss how useEffect manages side effects efficiently and provide key takeaways for improving API handling in React.

Fetching Multiple Users' Data Using useEffect Hook in React (Part 2)
Introduction

The useEffect hook is an essential tool in React for handling side effects in functional components. In this tutorial, we will explore how to fetch and display multiple users' data from an external API using the useEffect hook. By the end of this guide, you will understand how to make API calls, store the retrieved data in state, and render it dynamically in a table format.

Understanding useEffect in React

The useEffect hook allows us to perform side effects such as fetching data, updating the DOM, and managing subscriptions. It runs after the component renders and can be configured to run only when specific ...
... dependencies change.

Fetching User Data from an API

To fetch user data, we will use the fetch method inside useEffect and store the retrieved data in the component's state using the useState hook.

Step-by-Step Implementation

1. Setting Up the Component

We start by importing the necessary hooks from React:

import React, { useEffect, useState } from "react";
2. Creating the UserData Component

Inside our functional component, we define a state variable users to store the user data:

const UserData = () => {
const [users, setUsers] = useState([]);
3. Fetching Data Using useEffect

We use the useEffect hook to fetch data from an API when the component mounts:

useEffect(() => {
fetch("https://jsonplaceholder.typicode.com/users")
.then((response) => response.json())
.then((data) => setUsers(data));
}, []); // Empty dependency array ensures it runs only once on mount

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