Angular CLI

Sure! Here are some commonly used commands in Angular CLI:

• ng new: Creates a new Angular project.
• ng serve: Builds and serves the application locally for development.
• ng generate component: Generates a new component.
• ng generate service: Generates a new service.
• ng test: Runs unit tests.
• ng build: Builds the application for production.

These are just a few examples, and Angular CLI provides many more commands to help with various development tasks.

To generate a new component using Angular CLI, you can use the ng generate component command. For example, to generate a component named 'my-component', you would run the following command:

ng generate component my-component

This command will create a new folder for the component, along with the necessary files (HTML, CSS, TypeScript, and a test file) and update the necessary files to include the new component in the application.

To create a new Angular project using Angular CLI, you can use the ng new command. For example, to create a project named 'my-app', you would run the following command:

ng new my-app

This command will create a new folder named 'my-app' and generate the basic structure and files for an Angular project inside that folder. It will also install the necessary dependencies defined in the project's package.json file.

Before installing Angular CLI, make sure you have the following prerequisites:

1. Node.js: Angular CLI requires Node.js version 10.13 or later. You can download and install Node.js from the official website (https://nodejs.org/).

2. npm (Node Package Manager): npm is installed automatically with Node.js. Make sure you have the latest version of npm installed by running the following command:

npm install -g npm

Once you have Node.js and npm installed, you can proceed with installing Angular CLI.

To check the installed version of Angular CLI, you can use the following command:

ng version

This command will display the version of Angular CLI installed on your machine.

To update Angular CLI to the latest version, you can use the following command:

npm update -g @angular/cli

This command will update Angular CLI to the latest version globally on your machine.

The .angular-cli.json file allows you to configure various aspects of your Angular project, such as:

• apps: This section allows you to define multiple applications within your project, each with its own configuration settings.
• defaults: This section allows you to set default values for various options, such as the style and script file extensions.
• e2e: This section allows you to configure options related to end-to-end testing.
• lint: This section allows you to configure options related to linting.
• test: This section allows you to configure options related to unit testing.
• defaults: This section allows you to set default values for various options, such as the style and script file extensions.
• prefix: This option allows you to set the prefix for the generated component selectors.
• styles and scripts: These options allow you to specify additional stylesheets and scripts to be included in your project.
• assets: This option allows you to specify additional assets to be copied to the output directory during the build process.
• environment: This option allows you to define environment-specific configuration settings.

Angular CLI uses the .angular-cli.json file to read the configuration settings and apply them when running various CLI commands. For example, when you run the ng build command, Angular CLI reads the configuration from the .angular-cli.json file to determine how to build your project.

The .angular-cli.json file is also used by the CLI to generate code. For example, when you run the ng generate component command, Angular CLI uses the configuration settings from the .angular-cli.json file to determine the default values for the generated component.

The command to generate a service using Angular CLI is:

ng generate service service-name

Replace 'service-name' with the desired name for your service. This command will create a new service file with the specified name in the 'src/app' directory.

By default, Angular CLI generates the service in the 'src/app' directory. If you want to specify a specific module while generating a service, you can use the '--module' flag followed by the module file path.

For example, to generate a service named 'my-service' in the 'src/app/my-module' directory, you can use the following command:

ng generate service my-service --module src/app/my-module/my-module.module.ts

This will create the service file in the specified module directory.

The command to build an Angular application using Angular CLI is ng build. This command compiles the TypeScript code into JavaScript and generates the necessary files in the dist folder.

The command to serve an Angular application using Angular CLI is ng serve. This command starts a development server and hosts your application locally.

To specify a different port while serving an Angular application using Angular CLI, you can use the --port flag followed by the desired port number. For example, to serve the application on port 8080, you can use the command ng serve --port 8080.