Category: JavaScript

80 questions in JavaScript.

How to set up a modern JavaScript development environment

May 25, 2026 · JavaScript

Configure a productive JavaScript dev environment with package managers, linters, formatters, bundlers, and testing tools.

May 18, 2026 · JavaScript

Learn how polyfills add missing features to older environments and strategies for including them without bloating modern browsers.

May 12, 2026 · JavaScript

Identify and prevent frequent JavaScript bugs related to type coercion, scope, closures, and asynchronous execution.

May 06, 2026 · JavaScript

Explore essential JavaScript design patterns including module, singleton, factory, observer, and decorator for maintainable architecture.

April 29, 2026 · JavaScript

Learn how tree shaking eliminates dead code in JavaScript bundles, reducing size and improving load performance.

April 23, 2026 · JavaScript

Learn the differences between ES Modules and CommonJS, how to use import/export versus require/module.exports, and interoperability tips.

April 17, 2026 · JavaScript

Understand JavaScript bundling, how tools like Webpack and Vite combine modules, and the benefits for performance and compatibility.

April 10, 2026 · JavaScript

Learn the essential fields and scripts in package.json to manage metadata, entry points, and build tasks for JavaScript projects.

April 04, 2026 · JavaScript

Learn how to use npm to install, update, and manage JavaScript packages, and understand semantic versioning and lock files.

March 29, 2026 · JavaScript

Learn how to use the Performance tab and console APIs to identify bottlenecks, memory leaks, and slow functions in JavaScript.