Advanced CSS and Sass: Flexbox, Grid, Animations and More! (Udemy.com)

It was a good match for me as much as I had the basic skills of HTML and CSS. I really learned a lot and upgraded my skills to a better level. At this point it's up to me to better my skills and try to find a way to entry level. Will be starting to build my portfolio soon that I will share with you on the Q & A section.

This guy is great. He jumps right in to more complex elements of CSS, and yet his clear explanations made it easy for me to understand. He moves just quickly enough to keep my interest whereas in some other courses people talk endlessly on simple subjects and then rush through the more difficult topics. I wish all of the courses I've signed up for were held by this guy. Thanks!

Very complete course on CSS, I absolutely loved it! Jonas explains everything very well, you can watch it in faster speed if you find his way of talking a bit slow. The course covers everything including SaSS which was amazing, do note to watch the questions as the course isn't intended to be finished in order of lessons (we make some jumps but it all makes sense don't worry). All in all if you are looking for a complete CSS course that covers advanced topics, look no further than Jonas.

A huge thank you for this amazing course! ⭐️ It was truly wonderful and incredibly interesting. I really enjoyed every moment and learned so much. Special thanks to Jonas! I also want to give a big shoutout to the teacher, Sebastian Neferu, who patiently answers every question that comes up. Sebastian Neferu is an incredible person who gives truly valuable, helpful, and clear answers. He's so responsive and a pleasure to interact with. Big thanks to both Sebastian Neferu and Jonas Schmedtmann! ❤️

This course has fully met (and honestly exceeded) my expectations for an Advanced CSS curriculum. The instructor does a fantastic job covering everything that truly matters in real-world CSS: - Advanced animations and transitions - Modern layout techniques (Floats, Flexbox, Grid) - Responsive design principles - Advanced CSS properties and patterns - Sass fundamentals and architecture - Best practices for writing maintainable and scalable CSS - Clear focus on CSS architecture and long-term code quality The explanations are clear, practical, and project-driven, which makes the concepts easy to understand and apply in real projects. I especially appreciate the emphasis on clean structure and scalability, which many CSS courses completely miss. Suggestion for improvement: One small update I’d recommend is replacing @import with modern Sass features like @use and @forward in the 7–1 architecture. Since @import is deprecated in Dart Sass and will be removed in the future, showing the modern approach would make the course even more future-proof. Overall, this is an outstanding course and a must-have for anyone serious about mastering CSS at a professional level. Highly recommended.

I came into this class with a decent understanding of the basics of CSS. I didn't think I would get anything out of the lectures until much later in the course. I purchased this course years ago to understand the fundamental rules of CSS; I had been too lazy to learn. Finally, now, at the end of 2025 and beginning of 2026, I decided I had enough of knowing just enough to break every design project I have ever worked on. Now, because I didn’t skip the beginning, I learned three significant points of CSS theory that make the difference between improving the inconsistencies that occur with CSS, if you are inexperienced, like me, and too lazy to learn the parts we should never ignore. The first two I’ll share. It is a very simple part I never knew was important — box sizing. The second is how specificity was actually calculated. This second one was so helpful, I ended up pausing the course to inspect my current project and debug it in order to fix the issue I was having. No matter how advanced you think you may be, it will be worth your time, to follow along and take in the entire course, because you will end up saving yourself huge gaps of time by learning exactly how to play by the rules as they are intended for us to follow — only then will you be able to break a few of of them with confidence.

This is an amazing course, as I have learned various techniques in developing websites using advanced CSS and SASS technologies. Although there are only three website projects included in this course, I experienced learning many design styles and animations that are useful for designing my future projects. Overall, as I’m pursuing web development, I highly recommend this course to anyone interested in the field.

An amazing course for advanced CSS learning. I have done the other courses teaching by Jonas and enjoying his teaching style. One thing to improve is to give update videos, e.g. to support the replacement of deprecated node-sass by sass package and how to make changes in the sass. While leaving as a challenge to the student is fine, but maybe just a short video to give some directions.

This is another high-quality course by Jonas Schmedtmann. It is an excellent resource for mastering advanced CSS and SASS architecture. Just be aware that the course is showing its age slightly. You may encounter issues with the provided SASS/NPM configuration and syntax, and you will miss out on some modern Flexbox/Grid shortcuts (like gap for flexbox). Despite this, the core concepts remain invaluable.

The course is great for practicing your CSS skills and for learning new features. Some parts of the course need updating, but these take only about 2-3% of the course, so it's not a problem. This course was absolutely perfect for me in terms of repeating material I have learned in the other Jonas's HTML/CSS course, overall I feel much more confident in my skills now.