Angular 12 CLI

CLI is abbreviated as command line interface used to create angular resources and prototype or blueprint application.

This is very useful instant application, adding comments,services,templates,directives and pipes,helps reduce the time to run the application.

You can check more information here


Once applications created, let’s see an examples of usage of angular cli commands

Angular cli cheat sheet

Following are usage of CLI with examples

Create a new component with cli command

ng generate component creates new components and update the component reference to application module.

ng generate component [componentname] or 
ng g component [componentname]
ng g c [componentname]

option This creates following files

  • Typescript component file
  • HTML template
  • CSS or SCSS styles files
  • Unit testing or end to end testing spec file
B:\github\angular9\myapp>ng g c FirstComponent
CREATE src/app/first-component/first-component.component.html (30 bytes)
CREATE src/app/first-component/first-component.component.spec.ts (685 bytes)
CREATE src/app/first-component/first-component.component.ts (310 bytes)
CREATE src/app/first-component/first-component.component.css (0 bytes)
UPDATE src/app/app.module.ts (430 bytes)

To create a component without testing file (–spec=false)

To create a child components, use the command inside a fold

ng generate component

Start Angular server

ng serve is the command to start the server, By default webserver is started with default port 4200.

ng serve

You can change the port number to different port

ng serve --port=91001
feature Syntax Description
create a new application ng new appname Create a application with default folder structure with required components and install dependencies
Generate component ng generate component feature Created new Component’s,template,- css/scss/typescript and unit testcases, router configurations
Generate component ng generate component feature Created Component’s template,css/scss/typescript and unit testcases, router configurations
Building angular applicaiton ng build This compiles, minification ,transpile during build process