Angular CLI installation and setup - Mini Project: Build & Apply

Angular CLI Installation and Setup

📖 Scenario: You want to start building web apps using Angular. To do that, you need to install the Angular CLI tool on your computer. This tool helps you create and manage Angular projects easily.

🎯 Goal: Install Angular CLI globally, create a new Angular project named my-angular-app, and run the development server to see the default app in your browser.

📋 What You'll Learn

Install Node.js and npm on your computer

Install Angular CLI globally using npm

Create a new Angular project named my-angular-app

Run the Angular development server to serve the app locally

💡 Why This Matters

🌍 Real World

Developers use Angular CLI to quickly start and manage Angular projects, saving time and avoiding manual setup.

💼 Career

Knowing how to install and use Angular CLI is essential for frontend developers working with Angular to build modern web applications.

1

Install Angular CLI globally

Open your terminal or command prompt and type the command npm install -g @angular/cli to install Angular CLI globally on your computer.

Angular

# Run the command to install Angular CLI globally
# Your code here

Hint

This command uses npm to install the Angular CLI tool globally so you can use it anywhere on your computer.

2

Create a new Angular project

Use the Angular CLI command ng new my-angular-app to create a new Angular project named my-angular-app. When prompted, choose Yes for Angular routing and CSS for styles.

Angular

npm install -g @angular/cli
# Create a new Angular project named my-angular-app
# Your code here

Hint

This command creates a new folder with all the files needed for your Angular app.

3

Navigate into the project folder

Change your current directory to the new project folder by typing cd my-angular-app in your terminal.

Angular

ng new my-angular-app
# Change directory to my-angular-app
# Your code here

Hint

You need to be inside the project folder to run Angular commands for this app.

4

Run the Angular development server

Start the Angular development server by typing ng serve --open. This will build the app and open it in your default web browser at http://localhost:4200.

Angular

cd my-angular-app
# Run the Angular development server and open the app in the browser
# Your code here

Hint

This command compiles your app and opens it in the browser so you can see it live.

Practice

1. What is the main purpose of the Angular CLI tool?

easy

A. To create and manage Angular projects easily

B. To write Angular component code manually

C. To deploy Angular apps to the server automatically

D. To replace the need for Node.js in Angular development

Solution

1. Step 1: Understand Angular CLI role

   Angular CLI is a command-line tool that helps create and manage Angular projects quickly.

2. Step 2: Compare options

   Only To create and manage Angular projects easily correctly describes this purpose. Writing code manually or deployment are not CLI's main roles.

3. Final Answer:

   To create and manage Angular projects easily -> Option A

4. Quick Check:

   Angular CLI = project creation and management [OK]

Hint: Angular CLI helps start projects fast [OK]

Common Mistakes:

• Thinking CLI writes code for you
• Confusing CLI with deployment tools
• Assuming CLI replaces Node.js

2. Which command correctly installs Angular CLI globally using npm?

easy

A. npm install @angular/cli

B. npm install -g @angular/cli

C. ng install -g @angular/cli

D. npm global install angular-cli

Solution

1. Step 1: Recall npm global install syntax

   The correct syntax to install a package globally is npm install -g package-name.

2. Step 2: Match Angular CLI package name

   The official package name is @angular/cli, so the full command is npm install -g @angular/cli.

3. Final Answer:

   npm install -g @angular/cli -> Option B

4. Quick Check:

   Global install = npm install -g [OK]

Hint: Use npm install -g for global packages [OK]

Common Mistakes:

• Omitting the -g flag for global install
• Using ng install instead of npm install
• Wrong package name or missing @angular prefix

3. After installing Angular CLI globally, what command creates a new Angular project named my-app?

medium

A. ng create my-app

B. npm new my-app

C. ng generate project my-app

D. ng new my-app

Solution

1. Step 1: Identify Angular CLI command for new projects

   The Angular CLI uses ng new to create new projects.

2. Step 2: Check command syntax

   The correct syntax is ng new project-name, so ng new my-app is correct.

3. Final Answer:

   ng new my-app -> Option D

4. Quick Check:

   New project = ng new [OK]

Hint: Use ng new to create projects [OK]

Common Mistakes:

• Using ng create instead of ng new
• Trying npm new which doesn't exist
• Using ng generate project incorrectly

4. You run ng serve but get an error saying command not found. What is the most likely cause?

medium

A. Angular CLI is not installed globally

B. You forgot to create a new project first

C. You need to run npm start instead

D. Your Node.js version is too new

Solution

1. Step 1: Understand ng serve command

   ng serve runs the Angular development server and requires Angular CLI installed globally or locally.

2. Step 2: Analyze error cause

   If the command is not found, it usually means Angular CLI is not installed globally or not in PATH.

3. Final Answer:

   Angular CLI is not installed globally -> Option A

4. Quick Check:

   ng serve error = missing global CLI [OK]

Hint: Check if Angular CLI is installed globally [OK]

Common Mistakes:

• Assuming npm start replaces ng serve
• Ignoring CLI installation errors
• Blaming Node.js version without checking CLI

5. You want to create a new Angular project with routing enabled and SCSS styling using Angular CLI. Which command should you run?

hard

A. ng create my-app --routing --style=scss

B. ng new my-app -routing -style=scss

C. ng new my-app --routing --style=scss

D. ng generate project my-app --routing --style=scss

Solution

1. Step 1: Recall correct command for new project with options

   The Angular CLI uses ng new with flags like --routing and --style=scss to enable routing and SCSS styling.

2. Step 2: Verify option syntax

   Options must use double dashes and equal sign for style. So ng new my-app --routing --style=scss is correct.

3. Final Answer:

   ng new my-app --routing --style=scss -> Option C

4. Quick Check:

   New project with routing and SCSS = ng new with flags [OK]

Hint: Use ng new with --routing and --style flags [OK]

Common Mistakes:

• Using ng create instead of ng new
• Using single dash for options
• Wrong option syntax like -routing