Introduction When building login and protected pages, one common question is: where to store JWT token in Next.js? A JWT (JSON Web Token) is a signed string that proves a user is logged in. After a user enters the correct…
Next.js 16 introduced an important change to request handling. The old middleware.ts file convention has been renamed to proxy.ts. If you previously used Middleware in Next.js, the basic idea will feel familiar. You can use proxy.ts in Next.js to run…
Introduction React applications should feel fast and smooth. But sometimes, when a component has heavy rendering work, the UI may feel slow. For example, when a user types in a search box and React also filters a large list at…
When a user clicks a button on your website, the request may not stay inside one server. In modern applications, one request can travel through many services. For example: A frontend app calls an API Gateway.The API Gateway calls the…
Introduction When you build a frontend and backend separately, you will often face CORS errors and token errors. These errors are very common in real projects, especially when your frontend runs on one URL and your backend API runs on…
How to Access User Sessions in Next.js App Router Middleware If you are building a modern web application, authentication is usually your top priority. With the introduction of the Next.js App Router, the way we handle routing, data fetching, and…
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…
