Last updated 29-07-23 03:07
Angular CLI (Command Line Interface) is a powerful tool that allows developers to create, manage, and deploy Angular applications effortlessly. Whether you are a seasoned developer or just getting started with Angular, this article will provide you with a step-by-step guide on how to install Angular CLI and use it to streamline your development process.
Angular CLI is a command-line tool provided by the Angular team that helps in initializing, developing, testing, and deploying Angular applications. It abstracts away the complex configuration and setup tasks, enabling developers to focus on writing code and building features. Angular CLI streamlines the development process and provides various utilities to make Angular development more efficient.
Before installing Angular CLI, you need to have the following prerequisites in place:
To install Node.js, follow these steps:
Once Node.js is installed, you can verify the installation by opening a terminal or command prompt and running the following commands:
If the versions of Node.js and NPM are displayed, you have successfully installed Node.js.
With Node.js and NPM in place, you can now proceed with the installation of Angular CLI. Open your terminal or command prompt and enter the following command:
npm install -g @angular/cli
This command will install Angular CLI globally on your system.
To ensure that Angular CLI is installed correctly, run the following command:
You should see the installed version of Angular CLI along with other relevant details.
Now that Angular CLI is installed, you can start a new Angular project with the following command:
ng new my-angular-app
my-angular-app with the desired name for your project. Angular CLI will
generate a new project with the basic structure and necessary files.
Angular CLI sets up the project structure in a specific way to promote best practices. The main files and folders in your project include:
src: This folder contains the source code of your application.
node_modules: This folder contains all the project dependencies installed via NPM.
angular.json: This configuration file holds various settings for your Angular project.
package.json: This file defines the project's dependencies and scripts.
tsconfig.json: This file contains TypeScript compiler options.
To view your Angular application in the browser, run the following command:
This will compile your application and serve it locally. Open your browser and navigate to
http://localhost:4200/ to see your app in action.
Angular CLI provides convenient commands for generating different parts of your application. For example:
ng generate component my-component
ng generate service my-service
ng generate module my-module
These commands will create the corresponding files with boilerplate code, making your development faster and more efficient.
When you're ready to deploy your application to a production environment, build it using the following command:
ng build --prod
The build artifacts will be stored in the
dist/ directory, ready to be deployed
to a web server.
Angular CLI offers various optimization options to reduce the size and improve the performance of your application. Additionally, you can write unit tests and end-to-end tests for your Angular application using tools like Jasmine and Protractor.
To deploy your Angular application to a web server or a cloud platform, you need to upload the
contents of the
dist/ directory generated during the build process. Various hosting providers
support Angular applications, making it easy to deploy your app globally.
As the Angular framework evolves, so does Angular CLI. To keep up with the latest features and bug fixes, you can update Angular CLI using the following command:
ng update @angular/cli
This will update Angular CLI to the latest version.
Encountering issues while using Angular CLI is not uncommon. However, many common problems have simple solutions. Refer to the official Angular documentation, forums, and community resources to troubleshoot and resolve any problems you may encounter.
In conclusion, Angular CLI is an indispensable tool for Angular developers. Its seamless integration with the Angular ecosystem allows for smoother development and efficient project management. By following the steps outlined in this article, you should now have a solid understanding of how to install Angular CLI and leverage its capabilities to build robust and scalable Angular applications.
While it is possible to develop Angular applications without Angular CLI, using it greatly simplifies and speeds up the development process.
Yes, you can have multiple versions of Angular CLI installed on your system. Use the
npm install -g @angular/cli@ command to install a specific version.
No, Angular CLI is specifically designed for Angular (version 2 and above) projects.
Yes, when you create a new project with Angular CLI, it automatically installs the required
dependencies defined in the
You can uninstall Angular CLI globally using
npm uninstall -g @angular/cli, but
it's recommended to keep it installed for easier project management.