Note: Don't forget to use build systems so that the @import CSS at-rule doesn't get on production. You need to add the data-uia-text-loader-type attribute. Use the CSS file name as the value.

run npm install ngx-css-loaders2 --save link Loaders.css stylesheet to your document - you can find it in /node_modules/loaders.css/, e.g. add this in your html ...