Create React App is opinionated and hides build configuration. Learn how to configure multiple entry points without ejecting using Webpack dynamic imports, keeping your builds fast and maintainable.

Mobx uses observer pattern with a smart approach to create subscriptions implicitly. Some developers call it 'magic', but there's no magic at all - just pure ingenuity. Let's build a simplified version to understand how it works.

Do you like solving SQL puzzles? There is a fun exercise you can try if you love racking your brain with tough SQL tasks - write a query to display current month in calendar format.

Certbot allows to automatically install Letsencrypt certificates on a server. For a regular website with only 1 domain, the process of installing can be described as ordinary 'Next next install'. Things are getting complicated if you need to create a wildcard certificate.

Type and interface in TypeScript often confuse people because they look similar on the surface. The situation gets worse with outdated articles, biased comparisons, and style guides from some frameworks.

In ES6, there are two ways to export classes, functions, and variables from modules - named export and default export. Default exports have several disadvantages compared to named exports.