@sumitsaha

How to Set Up WebAuthn in Node.js for Passwordless Biometric Login

Mar 19 · 19 min read · JWT auth feels clean until a stolen token still looks valid to your server. That's the real problem: a bearer token proves possession of a token, but it doesn't prove possession of a trusted device. I

SSSumit Sahasumits-blog.hashnode.dev

Refactoring Legacy JavaScript with OpenAI Codex

Mar 8 · 12 min read · Refactor legacy JavaScript and Node.js code with OpenAI Codex using a safe workflow: map undocumented logic, lock behavior with tests, then modernize CommonJS, callbacks, and outdated patterns step by

The AI Coding Loop: How to Guide AI With Rules and Tests

Feb 25 · 14 min read · Building great software isn't about perfect prompts, it's about a disciplined process. In this guide, I'll share my workflow for shipping secure code: defining clear goals, mapping edge cases, and bui

How Execution Context Works in JavaScript – A Handbook for Devs

Jan 20 · 42 min read · Execution Context is one of the most fundamental yet most misunderstood concepts in JavaScript. It defines how JavaScript code is evaluated and executed, and it plays a central role in determining how variables, functions, and scope behave. Many core...

How Closures Work in JavaScript: A Handbook for Developers

Jan 16 · 49 min read · If you're learning JavaScript, you've probably heard the term "closure" at some point. In many developers' experience, just hearing this word can trigger anxiety. In nearly 17 years of programming experience, I've noticed that closures are one of the...