It’s been a while from my last project (Twitch.tv API Viewer). Building this Extended JS Calculator took so much time because I decided to widen user stories to mimic Windows calculator as much as possible. As a result my calculator has display with memory row that track previous calculations. You can chain multiple calculations without pressing equals button as well. I used: HTML/CSS with Bootstrap for responsiveness/JS/jQuery. In terms of design I decided to go with Google Material style. I’m quite satisfied with results of my hard work and I would love to know what do you think about this project. I would really appreciate opinions about my code, it has a lot of if statements but I don’t have any idea how to replace them for something more sophisticated.