Even though I work as front-end developer, I studied microelectronics at university. With this background it feels to me almost primitive, how microchips are made and how they look inside. It is however very different with anyone I usually speak. Everyone uses smartphones, computers, TVs, calculators, LED lights almost every…

Few months ago I came across an interesting project. Group of skilled electrical engineers developed machine that could regenerate old lead batteries. However they needed nice interface for workers on site to operate their machine. So they asked me for help. The setup was simple — my interface will run…

When I started working with arrays in JavaScript I always used for cycles to do operations on arrays. I was used to it from the university where we worked with C and I had no idea there are some built-in methods that would do all the dirty stuff I had…

With Redux and Hooks — When I started with React, one of my first assignments was to create a modal dialog box to display some data in it. I spent a lot of time googling how to create a function that I could call to display some window. It was a natural thing to do…

An introduction to snapshot tests — I met snapshot tests at one of the legacy projects I got into. I will be honest, I did not like them and had the same opinion as a majority of other articles that just throw dirt on snapshot testing. But then I thought: “If they are so bad, why…

It may seem that one person cannot change global warming and pollution in this dirty world. But if we do only small changes in our lives it can have big impact in large scale. And it is not about drastic changes like becoming a vegetarian or moving to the countryside…

No, I will not talk about some fancy video streams. I will talk about much more boring stuff. If you are NodeJs developer, you probably got in touch with stream api. When I first saw it, I was like: “Why do we need such complicated and relatively hard to maintain…

Avoid hackers adding a malicious SQL query into your parameter — SQL injection is an attack where a hacker adds a malicious SQL query into your parameter, which is then run on the SQL server. This can have a fatal effect on your application, as the attacker has full control over your data source. …

Recently, I was tasked to store some filter options into URL in a React + Redux app. It felt pretty simple as I’ve done it many times in other frameworks without any obstacles. As I was new to React, I started with research on Google how this should be done…