This is a very short chapter. In fact, it's probably the shortest in the book. However, I wanted to include it to give you options, particularly in terms of having an alternative technology to Bootstrap. Within reason, the more options you have, the better off you are. Additionally, some developers enjoy using Bootstrap, while others don't. I suspect that the reason for this is that Bootstrap's layout system is a grid. I don't know many developers who like being sandboxed into something like that. Don't get me wrong, I'm not knocking Bootstrap (Bootstrap is a great technology, and the name is even in the title of this book!), but Flex-Layout definitely feels like it is less rigid. Another reason that some developers would prefer working with something like Flex-Layout is that it feels more developer-friendly. For instance, instead of using DIV elements with special attributes, you use dedicated elements. This is sometimes referred to as taking a declarative approach, which sometimes simply feels more natural to developers. This may or may not make sense to you at the moment, but it will by the end of the chapter.