GyaanSetu JavaScript

The JavaScript and TypeScript ecosystem.

115 articlesDeep, practical knowledge

Legacy Code Gets Worse With Age

Legacy Code Gets Worse With Age Legacy code does not get better over time. It gets worse. Last week, I spent three hours fixing a bug. It should have taken 20 minutes. The issue w…

JavaScript · 2 min read

Array Iteration Methods in JavaScript

Array Iteration Methods in JavaScript JavaScript arrays offer many tools to handle data. You should know these methods to write clean code. forEach() Runs a function for each elem…

JavaScript · 2 min read

Stop Circular Dependencies With SDP

Stop Circular Dependencies With SDP Circular dependencies are silent killers. They do not cause build errors. They do not cause runtime exceptions on import. Instead, they cause s…

JavaScript · 2 min read

Most PDF Extractors Use the Wrong API

Most PDF Extractors Use the Wrong API Most PDF tools use the wrong data source. When developers talk about PDF extraction, they usually mean getTextContent(). This method provides…

JavaScript · 2 min read

Understanding Zustand

Understanding Zustand State management often feels too complex. You know how to use React useState. You know how to pass props. You know how to lift state up. But everything break…

JavaScript · 2 min read

How to Add WebMCP to Your Next.js App

How to Add WebMCP to Your Next.js App AI agents often struggle to understand web apps. They scrape the DOM and guess what buttons do. This leads to errors and hallucinations. WebM…

JavaScript · 2 min read

Your Code Is Being Replaced

Your Code Is Being Replaced I watched an AI agent work last week. It opened a GitHub PR. It wrote tests. It responded to review comments. It fixed a failing...

JavaScript · 2 min read

Types of Functions in JavaScript

Types of Functions in JavaScript Functions are essential in JavaScript. They organize your code. They stop repetition. They make programs easy to maint...

JavaScript · 2 min read