Middleware in Express.js
Middleware in Express.js plays a crucial role in processing HTTP requests before they reach the route handlers. Middleware functions are functions that have access to the request object (req), the response object (res), and the next middleware function in the application’s request-response cycle. Middleware can perform various tasks, such as modifying the request or response […]
Asynchronous programming in Node.js (callbacks, Promises, async/await)
1. Callbacks: Callbacks are a fundamental concept in asynchronous programming in Node.js. They are functions that are passed as arguments to other functions and are executed after the completion of an asynchronous operation. In the example above, the readFile function takes a callback function as its third parameter, which gets executed once the file is […]
Building RESTful APIs with Express.js
Building RESTful APIs with Express.js is a common practice in web development, especially when working with Node.js. Express.js is a popular web application framework for Node.js that simplifies the process of building robust and scalable web applications, including RESTful APIs. Here’s a step-by-step guide to help you get started: 1. Install Node.js and Express.js: Make […]