In this chapter, we took a big step towards more complex elements and theory. You deserve congratulations for nailing the first example of this book!
First, we presented icons in Bootstrap! It is a very handy tool to place the perfect icon in a perfect way on your page, by customizing the icon size and color. In version 4 of Bootstrap, they dropped native support for Glyphicons, even though you can still use it as a third-party library.
Then we touched the navigations bar of Bootstrap and presented a bunch of options to customize it for our case. We played with some tricks to collapse the menu in the navigation bar, and added more components to it, such as the button dropdown.
Moreover, we again talked about input grouping by showing some more examples of its usage, such as a group of an input and a button.
Finally, we added some theory to the soup, by introducing flexbox and showing that you can use it in conjunction with Bootstrap in the new version 4.
In the next chapters, we will...
