Angular 4 Tutorial for Beginners: Learn Angular 4 from Scratch https://www.youtube.com/watch?v=k5E2AVpwsko&list=PLTjRvDozrdlxAhsPP4ZYtt3G8KbJ449oT 安装Angular CLI: npm install -g @angular/cli 安装之后输入ng --version检查版本. 创建新项目: ng new hello-world 打开vs code,…