The old version of Bootstrap was designed for jQuery, which is not compatible with AngularJS. That said, the newest version 4 supports both jQuery and AngularJS. It means that when you use Bootstrap Version 4 it will work just fine in an AngularJS project!
Bootstrap has better support for large screens, which is especially important on mobile devices. Designers can use one code base and have the site automatically adapt to the screen size. Mobile-first design is becoming increasingly popular, and it's a much more efficient way of designing because it requires less work on the front end.
Sass variables allow you to store values in one place and use them elsewhere in your code without having to repeatedly type out the value. While building an app, developers can leverage the reusable code set up and applied to many different projects.
Bootstrap's re-name class is also new in the latest version of Bootstrap. You can use it to change a name that references an element to match your own naming conventions.
It includes additional typographic options for larger and smaller screens. This update is a welcome addition to the framework and should be welcomed by those developers who are looking for more customization in their projects