npm install --save ngx-http-loader
// Import in app module
NgxHttpLoaderModule.forRoot()
// Use in app.component.html
<ngx-http-loader [opacity]="0.9" [title]="'paithaniandsilksaree.com'" [subTitle]="'Buy best paithani or semi paithani silk sarees or paithani accessories.'" [loader]="loader.ELLIPSIS" [iconColor]="'white'" [backdropBackgroundColor]="'black'">
</ngx-http-loader>
// add Loader enum to app.component.ts
public loader = NgxLoader;
more info visit
https://www.npmjs.com/package/ngx-http-loader
demo link
https://bhushanzade.github.io/ngx-http-loader/