Angular Js

selector: 'app-root' call method <app-root></app-root>    Using Class method selector: '.app-root'  call method <div class="app-root"></div>   Using attribute method selector: '[app-root]'  call method <div app-root></div>

 ng g c test above command is to create new component, and test is a component name

 Install the CLI using the npm package manager:    npm install -g @angular/cli   ng new my - first - project  cd my - first - project  ng serve