JavaScript

After web creation with HTML and its layout with CSS, JavaScript has become the language with which we can interact with the user in the browser.

But if this doesn’t sound like much to you, the function of JavaScript has transcended, becoming a language for both FrontEnd and BackEnd developers.

Many frameworks have been created based on JavaScripts.
We can develop anything including the famous AppWeb.

Without a doubt, JavaScript is a language that every programmer should master today.

In this section we help you with the most frequent doubts and with some day-to-day problems.

Common npm Problems and How to Fix Them Safely

Discover frequent npm problems, why they happen and how to fix them safely, from permissions to audits, without breaking your projects.

Learn how to bundle npm packages like uniq with Browserify and run Node-style require() code directly in any web browser.

Claude now generates interactive charts and diagrams inside the chat, helping explain complex data and concepts without leaving the conversation.

Learn how to build quadratic and kernel ridge regression with SGD training in JavaScript, from gradients and loss to practical implementation tips.

Discover how JavaScript reached a stable, TypeScript‑driven, server‑first era with ECMAScript 2025, Vite, React stacks, AI tools and edge platforms.

Learn to use useEffect and useState correctly in React with real examples, dependency tips and best practices that avoid bugs and loops.

Aprende a implementar autenticación JWT en APIs Node.js con Express, MongoDB y JWKS de forma segura y escalable.

Understand arrow functions and the this keyword in JavaScript with clear rules, examples and pitfalls so you know exactly when to use each one.

Learn why long polling in PHP is hard to scale, how to optimize it, and when to switch to WebSockets, SSE or external real-time services.