AJAX Call in Node.js

Representational State Transfer is referred to as REST. An API or web API (Application Programming Interface) that complies with the limits and restrictions of the REST architectural style and allows interaction with RESTful web services is known as a REST API or RESTful API.

In today’s post, we’ll learn how to make requests using third-party packages using Node.js.

AJAX Call in Node.js

The node-fetch is a lightweight package/module that allows us to use the fetch() function in Node.js. Its functionality is very similar to window.fetch() in Vanilla JavaScript.

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The node-fetch is a free third-party package, a Promise-based HTTP client for the browser and Node.js. It is available on NPM.

You can send asynchronous HTTP requests to REST endpoints using node-fetch. Performing CRUD operations becomes an easy task using node-fetch.

We can use this in Vanilla JavaScript or with a library like Node.js or React. You can find more information about node-fetch here.

The HTTP GET method fetches resources from the server. For example, browsers use the HTTP GET request method when fetching the TODO data list from the server or fetching information of specific TODO requests.

GET and HEAD requests do not change the server’s state.

GET APIs are idempotent, which means making multiple identical requests always produce the same result every time until another API such as POST or PUT is made to the server, which changes the resource’s state on the server.

Install the node-fetch library using the following command $ npm i node-fetch.

A GET request is created with the get method.

const fetch = require('node-fetch');
async function getTodoData() {
const payload = { title: 'Hello World', body: 'Welcome to Node tutorial' };
  const response = await fetch('https://jsonplaceholder.typicode.com/posts', {
    method: 'post',
    body: JSON.stringify(payload),
    headers: {'Content-Type': 'application/json'}
  });
  const data = await response.json();
  console.log(data);
}
getTodoData();

In the example above, once the user runs the file, a GET call is sent to the Node server using the fetch module with the specified URL (dummy in this post). If the server processes this data without interruption, it returns a successful message.

Based on the output of the server response, you can print the message on the console or notify the user with the appropriate message.

Attempt to run the above code snippet in replit, which supports Node.js; it will display the result below.

{ title: 'Hello World', body: 'Welcome to Node tutorial', id: 101 }

Demo