Affix not working on Angular 5

[కోటిపల్లి కృష్ణ]

[Cormac Relf]

Works just fine.

# thanks @beeman
git clone https://github.com/cormacrelf/ngx-scrollspy-angular-cli-demo
cd ngx-scrollspy-angular-cli-demo
npm install @angular/{animations,common,compiler,compiler-cli,core,forms,http,platform-browser,platform-browser-dynamic,platform-server,router}@'^5.0.0' typescript@2.4.2 rxjs@'^5.5.2'
npm start
open http://localhost:4200