useCallback in React is an important React Hook that helps you optimize performance by memoizing functions and preventing unnecessary function recreation during component re-renders. Introduction React is one of the most popular JavaScript libraries for building modern user interfaces. When…
Modern web applications receive thousands of requests every day. Without proper protection, your API can become vulnerable to abuse, brute-force attacks, excessive traffic, and even server crashes. This is where a Rate Limiter in Node.js becomes extremely important. A rate…
Apollo Server Context Undefined Fix If you are building a GraphQL API using Node.js, Express, and Apollo Server, you may suddenly face an issue where context becomes undefined. This is one of the most common problems developers face while implementing…
Cannot GET / Route Express Fix If you are learning Node.js and Express.js, one of the most common errors you will see is: This error confuses many beginners because the server is running correctly, but the browser still shows an…
Next.js Cookies Not Working If you are building authentication, sessions, JWT login, or user tracking in Next.js, you will eventually face one common issue: Next.js cookies not working This problem is extremely common, especially when using: Sometimes cookies work in…
Next.js JWT Authentication is one of the most important concepts in modern web development.. If you are building a modern application using Next.js App Router, then understanding how to use JWT authentication with GraphQL is extremely valuable. In this tutorial,…
GraphQL has become one of the most popular technologies for building modern APIs. If you are working with Node.js, Apollo Server, or any GraphQL backend, understanding GraphQL Context is extremely important. Context helps you share common data like authentication details,…
What is JWT Verification in GraphQL in Simple Terms? JWT (JSON Web Token) is a secure token used to identify users. After login: Example token format: Why JWT After Merging Resolvers? This guide is a continuation of our previous post…
As a JavaScript developer, you’ve likely encountered the concept of closure, but perhaps you’re still unsure about how to harness its full potential. Closure is a fundamental aspect of JavaScript that can help you write more efficient, modular, and scalable…
JavaScript Guide for Beginners JavaScript is one of the most powerful programming languages used in modern web development. In this guide, you will learn core concepts, ES6 features, asynchronous programming, and best practices to build efficient web applications. Introduction to…
