angular class notes

 https://code.visualstudio.com/docs/editor/github

https://levelup.gitconnected.com/how-to-run-multiple-node-and-angular-versions-simultaneously-1f58e6d150de

https://www.zenesys.com/blog/angular-14-features

https://theninehertz.com/blog/angular-12-vs-angular-13

https://pythontutor.com/ 

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Nullish_coalescing_operator

https://angular.io/guide/styleguide

list of sample apps on angular site

https://developer.mozilla.org/en-US/docs/Web/API/Element/mouseover_event

https://angular.io/guide/architecture-services