Harnessing the Power of React API Calls

React API calls are a reference to the process of how React applications send a request to an external web API and receive a response. Without React API calls, it would not be possible for your application to communicate and exchange data with other third-party systems.

Steven Ang Cheong Seng

Steven Ang Cheong Seng

15 May 2025

Harnessing the Power of React API Calls

React is a free, open-source JavaScript library that many web developers use to create sophisticated and alluring web pages. It is also part of the popular tech development framework stack MERN that many developers rely on to create web or mobile apps.

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For React applications to interact or communicate with third-party systems, it has to execute an API call. To fully grasp this concept, this article will introduce React API calls, prime examples of React API calls with code snippets included, and real-world examples of React API calls that are commonly used.

What are [React] API Calls?

API (Application Programming Interface) calls are essential in enabling communication and data between different programs or systems. API calls can be considered the full package, acting as requests and responses between two software.

To understand how React API calls work, a simple demonstration will be shown.

Showing How to Make a React API call

It first begins when a React app needs to access a certain piece of data or functionality from another program. This is when it sends an API call, which can also be referred to as a structured request. The typical API call request will include:

Once the receiving program receives the React API call, it will process your request and send back a response. An API call response will typically include:

Positive Aspects of React API Calls

By using API calls for React applications, you will be encouraged to follow a certain structure, which can be assured, will be beneficial for you in the long run.

Real-World Examples of React API Calls

1.E-commerce websites:

ecommerce websites react api calls
E-commerce websites use API calls

2. Social media platforms:

social media api calls
Some of the popular social media platforms utilize API calls

3. Weather applications:

weather apps api call react
Weather applications also rely on API calls for data

React API Call Code Example: Fetching data from Public API Using Fetch API

Here is an example of how to fetch data from a public API using the Fetch API for updating the state of a React application (or component).

import React, { useState, useEffect } from 'react';

function App() {
  const [data, setData] = useState([]);

  useEffect(() => {
    const fetchData = async () => {
      const response = await fetch('https://jsonplaceholder.typicode.com/posts');
      const jsonData = await response.json();
      setData(jsonData);
    };

    fetchData();
  }, []);

  return (
    <div>
      <h1>Fetched data</h1>
      {data.length > 0 ? (
        <ul>
          {data.map((post) => (
            <li key={post.id}>{post.title}</li>
          ))}
        </ul>
      ) : (
        <p>Loading data...</p>
      )}
    </div>
  );
}

export default App;
Simple React App Code Sample

Code Explanation:

1. Importing the necessary components:

2. Define the App component:

3. useEffect hook:

4. Return statement:

Apidog - API Development Platform for Testing React API Calls

Apidog is an all-in-one API development tool created with a design-first orientation. With a simplistic and intuitive UI design, Apidog encourages its users to visually design and build APIs.

create new project apidog
Creating a new project on Apidog
button

If you need to test your React API calls, you can use Apidog to do so! This next section will show a simple demonstration.

Importing React API Call Onto Apidog

Before we can start testing your React API call, we need to first import the file.

import different file types onto Apidog
Importing various kinds of files onto Apidog

First press the Import Data section found after pressing the Settings button, as shown in the picture above. Here, you can drag your React API file to the Apidog window.

Generating React Fetch API Code Using Apidog

If you need help with writing React Fetch API code, you can rely on Apidog to provide you with a one-click client code generator.

generating client code using apidog
Select Generate Client Code

Firstly, locate the </> button that can be found around the top right corner of the Apidog window application.

You can then select JavaScript. The default choice is the Fetch code that we can copy for further use.

Conclusion

React API Calls are an important component to understand, especially if you are planning to create React-based applications. With React API calls, you can create a variety of applications - all you need to do is find compatible APIs that provide the functionalities or data that you need.

Apidog is an suitable all-in-one API platform that provides a comfy yet elegant interface for users to enjoy. If you need a place to test out your React API calls, try out Apidog!

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