1. Event propagation Event propagation is the way events travel through the DOM tree. There are two directions of propagation: Example of event propagation Let’s assume we have the following HTML: And we add two event listeners: If you click on #child, you will see in the console: This happens because the event bubbles (it […]

In CSS, the background property is used very often. It lets you add background colors, images, gradients, and many other visual effects. By using background-image together with background-color, you can create nice-looking sections, banners, hero images, layouts, and full website designs. Background-color This is the simplest and most commonly used type of background. The background […]

Code review is not only a learning opportunity for the person whose code is being reviewed. It is also a great way to spot recurring patterns of mistakes across the team. After reviewing dozens of pull requests, certain classics start to emerge – issues that appear regardless of a developer’s level of experience. Some of […]

In the world of IT, it’s easy to come across practices that look clever at first glance but are little more than smoke and mirrors. One of them is security by obscurity – an approach where system protection relies mainly on hiding information to make it harder for an attacker to understand how things work […]

In the technology industry, dozens of decisions are made every day, from architectural choices and implementation details to estimates and broader product decisions. Many of these decisions are not based purely on knowledge or experience, but are influenced by psychological mechanisms that shape how problems are perceived, risks are evaluated, and consequences are anticipated. These […]

The first years of commercial work in IT are an intense period of learning, not just technology, but most importantly how to function in a team and grow in the industry. During 5 years of working with code, I’ve come to understand several things that genuinely change how you think about projects, writing code, and […]

Data- attributes in HTML – what are they and what are they used for? When writing a website in HTML, we often need to store some extra information about an element. This can be information that is not visible to the user but is useful in JavaScript or CSS – for example, it can be […]

Object destructuring is a syntax in JavaScript that allows you to extract values from objects and assign them to variables in a straightforward way. This enables easy access to data stored in objects without having to reference the object’s properties each time.

Midnight Commander (MC) is a free and open-source file manager that provides a text-based user interface. It is available on numerous Unix-like systems, including Linux and macOS. It uses a two-panel layout, allowing users to view the contents of two directories simultaneously. This design makes it easy to move or copy files between directories. Due […]

If you’re reading this post then you probably have problem with slider, that don’t work correctly if occurs several times on the same page. I have a solution to you – simple jQuery slider, that you can put on page as many times, as you want and it will be work as it should.