January 22, 2018 — Intersection information is needed for many reasons, such as lazy loading of images. But there’s so much more. It’s time to get a better understanding and different perspectives on the Intersection Observer API. Ready? Read More…

October 18, 2017 — Five years ago, when, for the first time ever, I was invited to speak at one of the best front-end conferences in Europe, I had quite a mixture of feelings. Obviously, I was incredibly proud and happy: I had never had a chance to do this before for a diverse audience of … Read More…

November 15, 2016 — Three user interfaces (UIs) go to a pub. The first one orders a drink, then several more. A couple of hours later, it asks for the bill and leaves the pub drunk. The second UI orders a drink, pays for it up front, orders another drink, pays for it and so on, and in a couple … Read More…

December 10, 2015 — When technical performance optimizations reach certain limits, psychology and perception management might help us to push the limits further. Waiting can consist of active and passive phases; for the user to perceive a wait as a shorter one, we increase the active phase and … Read More…

November 5, 2015 — Time can be analyzed from two different points: objective and psychological. When we talk about time that can be measured with a stopwatch, we’re talking about objective time, or clock time. Objective time, though, is usually different from how users perceive time while … Read More…

September 25, 2015 — Those of us who consider ourselves developers, including me, are very task-oriented. We like to be guided towards optimal results, and we find ourselves uncomfortable when there is no clear path to follow. That is why we all want to know how to do things; we like … Read More…