У вашего броузера проблема в совместимости с HTML5
Swift: AutoLayout
Hello iOS developer pals! You definitely know auto layout for coding. It seems to be complicated to do, doesn’t it? Using t SnapKit for easier and more clearly way to code
Part 2: https://www.youtube.com/watch?v=-aLQ6tg-Gyo
Blog: http://huyproswift.blogspot.com/2016/11/blog-post.html