1 . What is AngularJS
The most central: MVVM, modular, automated two-way data binding, dependency injection, internal instructions, semantic tags
Official website: https://docs.angularjs.org/
Installation file angular-1.5.8.zip
If you are using angular develop the most basic function, only need to import angular.js
From angularJS 1.2 version, the routing function is individually isolated js
