NG-Bootstrap

That has a library of things already built that you can use and customize easily.

NG-bootstrap is easy to use and very convenient to use in real-world projects. You don't have to learn anything new to use NG-Bootstrap. It is simple if you already work on Angular Framework. NG-bootstrap installation in the project is simple by just using a single command. Widgets are perfectly built and have responsive behavior. I liked the way components are built-in ng-bootstrap keeping angular capabilities in mind. By default, animations are turned on in standard bootstrap components.

ng-bootstrap is a tool that helps developers create beautiful and responsive user interfaces for their Angular applications. It is compatible with Angular and has a range of UI components based on Bootstrap 4, which can be customized to match the application's design needs. Additionally, ng-bootstrap is designed with accessibility in mind, ensuring that all users, including those with disabilities, can use the application.