URL Parameters vs Query Strings in Express.js: When to Use Each and Why
Learn the difference between URL parameters and query strings in Express.js, when to use each, and how to access them with real working code examples.
Node.js & Express
19 articles
Storing and Serving Uploaded Files in Express: A Complete Guide
Learn how to store uploaded files with Multer, serve them via Express static middleware, and secure your uploads against common vulnerabilities.
Async Code in Node.js: Callbacks and Promises Explained with Real Examples
Learn why async code exists in Node.js, how callbacks work, why they fail at scale, and how Promises solve it with real, runnable examples.
Async Code in Node.js: From Callback Hell to Promises
Learn how async code works in Node.js, why callbacks nest badly, and how Promises fix it with flat chains and unified error handling.
Setting up Express.js with TypeScript
TypeScript catches Express bugs at compile time, not in production. This guide sets up strict typing, hot-reload dev workflow, and a compiled producti
Why Does setImmediate Sometimes Run Before setTimeout(fn, 0)?
Author: Saurabh Prajapati · Software Engineer @ IBM India · May 2025 I was writing some async Node.js code and stumbled across something that genuinely…
Function Declaration vs Function Expression: What's the Difference?
By Saurabh Prajapati | IBM Software Engineer | WebDev Cohort 2026 When I first started writing JavaScript, I would just write functions like this and move…