Hey Pete, I know it was like that prior to Angular 6, and I successfully used hammerjs in my app without additional ‘install’ efforts. But I think it got “debundled” with Angular 6. Here is the SO: https://stackoverflow.com/questions/52584700/could-not-find-hammerjs-in-angular-6

If you know exact details — please share — would love to add those to the article for clarity!