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Modern applications constantly communicate with servers. Examples: mobile apps fetching data websites loading products frontend sending login requests This communication usually happens using API
Middleware is one of the most important concepts in Express.js. At first, beginners usually memorize syntax like: app.use() without understanding what middleware actually does. But middleware is the
Many modern applications allow users to upload files. Examples: profile pictures PDFs resumes product images But handling uploads in Node.js is not as simple as handling normal JSON data. This i
Node.js allows JavaScript to run on the server, but building applications using only the built-in HTTP module quickly becomes difficult. Even simple routing requires a lot of code. This is where Expre
File uploads are used in many real-world applications. Examples: profile pictures PDFs resumes product images videos But beginners often upload files without understanding an important question
Modern applications need a way to identify users securely. Whenever users: log in access private data use protected routes the server needs to verify their identity. This process is called: Authe
Strings are one of the most commonly used data types in JavaScript. Whenever we work with: names emails search inputs messages user data we constantly process strings. JavaScript already provid
Authentication is one of the most important parts of backend development. Whenever users: log in access accounts stay signed in the server needs a way to identify them. This is where: sessions
Before building APIs or backend applications using Node.js, the first step is setting up the environment correctly. Many beginners get confused between: Node.js JavaScript terminal commands REPL