After installing Bootstrap 4, in Angular 4, I am getting an error : [Script Loader] Error: Bootstrap tooltips require Tether (http://tether.io/). I tried installing tether, passing tether CDN but it dint help.
Add the reference to tether.min.css in your angular-cli.json file
styles": [
"styles.css",
"../node_modules/tether/dist/css/tether.min.css",
"../node_modules/bootstrap/dist/css/bootstrap.min.css"
],
"scripts": [
"../node_modules/jquery/dist/jquery.min.js",
"../node_modules/tether/dist/js/tether.min.js",
"../node_modules/bootstrap/dist/js/bootstrap.min.js"
],