Even when I use a UI component library I add ngx-toaster to add toast notification feature to the Angular App. I think it's because I like the design of ngx-toaster better than other UI Component libraries. It has a simple design and has all the basic features you would expect from a toast library. So I kind of stick to this library for all Angular projects because I'm used to the syntax and it just works without any issues.
I have used this library as the default for notifications/messages to the user. The documentation is very well written and easy to understand. The setup is also very simple. The customizability of content and animations is limited and thus the 4 stars.
Used it for some time, but there are other libraries with more components than just a toastr. Doesn't make sense to have a library just for this. Despite of that, works very well and is well designed.
A simple tool for adding live messages to inform the user about events inside the application. Easy installation and simple use are the keys to the success of this library.
Easy to use and good documentation. I like the custom toast feature, works very well in all the projects have used it in.