Описание тега ng-bootstrap
Набор директив Angular 2+, основанный на разметке Twitter Bootstrap версии 4+ и CSS.
https://ng-bootstrap.github.io/img/ngb-logo.png
ng-bootstrap is a set of angular directives based on version 4+ of Twitter Bootstrap's markup and CSS.
This project was created by the angular-ui team, the same people who are behind the widely popular set of Bootstrap-powered directives for AngularJS 1.x.
The goal is to provide native Angular directives without any dependency on jQuery or Bootstrap's JavaScript. It is often better to rewrite an existing JavaScript code and create a new, pure Angular directive. Most of the time the resulting directive is smaller as compared to the original JavaScript code size and better integrated into the Angular ecosystem.
Currently supported directives are: