https://angular.io/guide/elements

https://www.npmjs.com/package/@angular/elements
https://github.com/angular/angular/tree/master/packages/elements

articles
2018
https://nitayneeman.com/posts/a-practical-guide-to-angular-elements/
https://nitayneeman.com/posts/building-a-custom-element-using-angular-elements/
https://codingthesmartway.com/angular-elements-a-practical-introduction-to-web-components-with-angular-6/

presentations
2017
https://www.youtube.com/watch?v=vHI5C-9vH-E
https://www.youtube.com/watch?v=Hi2lRWUDuHA

sample
https://stackblitz.com/edit/angular-elements