CMD:
npm install bootstrap
Add dependencies for Bootstrap:
npm install jquery popper.js
Open the file angular.json in the root of your project.
Add "node_modules/bootstrap/dist/css/bootstrap.min.css" in the styles[] array.
How to remove Bootstrap:
npm uninstall bootstrap
How to install Bootstrap 5:
npm install bootstrap@5.0.0-alpha1
npm install popper.js
Links: