Using Bootstrap in Angular with SCSS

npm install bootstrap --save

or

yarn add bootstrap

If you are using SCSS, don't add it to your angular.json config. Instead, add this to your scr/styles.scss directly:

@import '../node_modules/bootstrap/scss/bootstrap';

if you are using css

"styles": [
          "node_modules/bootstrap/dist/css/bootstrap.css",
          "src/styles.css"
        ],

        "scripts": [
          "node_modules/popper.js/dist/umd/popper.min.js",
          "node_modules/bootstrap/dist/js/bootstrap.min.js"
        ]