1. Course Introduction

Angular (commonly referred to as "Angular 2+" or "Angular v2 and above")[4][5] is a TypeScript-based open-source front-end web application platform led by the Angular Team at Google and by a community of individuals and corporations. Angular is a complete rewrite from the same team that built AngularJS.
' Angular was a ground-up rewrite of AngularJS'.

Angular does not have a concept of "scope" or controllers, instead it uses a hierarchy of components as its primary architectural characteristic.[6]
Angular has a different expression syntax, focusing on "[ ]" for property binding, and "( )" for event binding[7]
Modularity – much core functionality has moved to modules
Angular recommends the use of Microsoft's TypeScript language, which introduces the following features:
Class-based Object Oriented Programming
Static Typing
Generics
TypeScript is a superset of ECMAScript 6 (ES6), and is backwards compatible with ECMAScript 5 (i.e.: JavaScript). Angular also includes ES6:
Lambdas
Iterators
For/Of loops
Python-style generators
Reflection
Dynamic loading
Asynchronous template compilation
Iterative callbacks provided by RxJS. RxJS limits state visibility and debugging, but these can be solved with reactive add-ons like ngReact or ngrx.
Angular 6 was released on May 4, 2018.[20]. This is a major release focused less on the underlying framework, and more on the toolchain and on making it easier to move quickly with Angular in the future, like: ng update, ng add, Angular Elements, Angular Material + CDK Components, Angular Material Starter Components, CLI Workspaces, Library Support, Tree Shakable Providers, Animations Performance Improvements, and RxJS v6.