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JavaScript

Delve into the world of JavaScript, the language of the web. This tag covers tutorials, best practices, and tips for mastering JavaScript, from foundational concepts to advanced techniques for building dynamic and interactive applications.

What Is TC39 and Why JavaScript Developers Should Care

What Is TC39 and Why JavaScript Developers Should Care

If you’ve been working with JavaScript for a while, chances are you’ve come across the term TC39—especially when hearing about upcoming features like optional chaining, pattern matching, or pipeline operators. But what exactly is TC39? And why does it matter to your day-to-day coding? 🧠 TC39 in a

Why typeof null === "object" in JavaScript Is Not a Bug You Can Fix

Why typeof null === "object" in JavaScript Is Not a Bug You Can Fix

If you’ve been writing JavaScript for any length of time, chances are you’ve come across this puzzling behavior: typeof null; // "object" At first glance, this seems like a blatant bug—and you’re not wrong. But it’s more complicated than that. This behavior is one

The Curious Case of NaN: When Numbers Stop Making Sense

The Curious Case of NaN: When Numbers Stop Making Sense

In the world of JavaScript, there’s one value that consistently surprises both beginners and seasoned developers alike: NaN. At first glance, it might look like just another value in the Number type. But dig a little deeper, and you’ll realize it’s anything but ordinary. Let’s start

Why I Always Peek at package.json When Exploring Open Source Projects

Why I Always Peek at package.json When Exploring Open Source Projects

Whenever I browse open-source JavaScript projects on GitHub, there’s one file I always check first: package.json. At first glance, it might seem like a boring metadata file — but over time, I realized package.json is a goldmine of ideas, inspiration, and hidden gems. Let me explain why. 1.

Why "100% Node.js Compatibility" in Deno and Bun Actually Matters More Than You Think

Why "100% Node.js Compatibility" in Deno and Bun Actually Matters More Than You Think

If you have recently explored modern runtimes like Deno or Bun, you've probably seen the bold claim: "100% Node.js compatibility." At first glance, it sounds like marketing fluff. But when you dig deeper, you realize it touches on one of the most critical factors for

Your Source Code Is in Production: The Hidden Danger of Turbopack Sourcemaps

Your Source Code Is in Production: The Hidden Danger of Turbopack Sourcemaps

"We deployed our app using Next.js and Turbopack... and accidentally exposed our entire source code." That’s not clickbait. It’s happening. If you’re experimenting with or already using Turbopack, the Rust-based successor to Webpack in the Next.js ecosystem, there’s something you need to

Don't Let the Default Fool You: Choosing the Right Option When Installing React 19 Packages

Don't Let the Default Fool You: Choosing the Right Option When Installing React 19 Packages

If you've recently started a new project with React 19 and tried installing a component library like shadcn/ui, you might have been greeted by a message that looks something like this: "Some packages may fail to install due to peer dependency issues in npm..." And