Angular 2 - Installation

Last modified on: December 1, 2024

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<h3>Angular 2 - Installation Guide</h3>
<h4>What is Angular 2?</h4>
<p>Angular 2 is a JavaScript framework for building web applications. It features a component-based architecture, TypeScript support, and tools for creating efficient single-page applications (SPAs). This guide walks you through installing Angular 2 and setting up your first project.</p>
<hr />
<h3>Prerequisites</h3>
<p>Before installing Angular 2, ensure the following tools are installed:</p>
<ol>
<li>
<p><strong>Node.js and npm</strong><br />Angular requires Node.js and npm for managing dependencies.</p>
<ul>
<li>Download and install Node.js from <a href="https://nodejs.org" target="_new" rel="noopener">nodejs.org</a>.</li>
<li>Verify installation:
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<pre class="language-javascript"><code>node -v
npm -v
</code></pre>
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</li>
</ul>
</li>
<li>
<p><strong>Angular CLI</strong><br />The Angular Command Line Interface (CLI) simplifies the setup and management of Angular projects.</p>
</li>
</ol>
<hr />
<h3>Installation Steps</h3>
<h4>Step 1: Install Angular CLI</h4>
<p>Use npm to install Angular CLI globally:</p>
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<pre class="language-javascript"><code>npm install -g @angular/cli
</code></pre>
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<p>Verify the Angular CLI installation:</p>
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<pre class="language-javascript"><code>ng version
</code></pre>
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<h4>Step 2: Create a New Angular Project</h4>
<p>Run the following command to create a new Angular project:</p>
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<pre class="language-javascript"><code>ng new my-angular-app
</code></pre>
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<p>You will be prompted to configure the project (e.g., enabling routing, selecting CSS preprocessor). Choose as per your requirements.</p>
<p>Navigate to the project directory:</p>
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<pre class="language-javascript"><code>cd my-angular-app
</code></pre>
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<h4>Step 3: Serve the Application</h4>
<p>Start the development server:</p>
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<pre class="language-javascript"><code>ng serve
</code></pre>
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<p>Open a browser and visit <code>http://localhost:4200</code> to view your application.</p>
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<h3>Project Structure</h3>
<p>When you create a new Angular project, it generates the following structure:</p>
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<pre class="language-javascript"><code>my-angular-app/
├── e2e/                # End-to-end tests
├── node_modules/       # Installed dependencies
├── src/                # Application source files
│   ├── app/            # Application components and modules
│   ├── assets/         # Static assets
│   └── environments/   # Environment-specific configurations
├── angular.json        # Angular CLI configuration
├── package.json        # npm dependencies
└── README.md           # Project documentation
</code></pre>
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<h3>Adding Angular Dependencies</h3>
<ol>
<li>
<p><strong>Install Additional Packages</strong><br />Use npm to install Angular-specific libraries or third-party packages:</p>
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<pre class="language-javascript"><code>npm install @angular/forms
npm install @angular/router
</code></pre>
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</li>
<li>
<p><strong>Import Libraries</strong><br />Import installed libraries in your modules as needed:</p>
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<pre class="language-javascript"><code>import { FormsModule } from '@angular/forms';
import { RouterModule } from '@angular/router';
</code></pre>
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</li>
</ol>
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<h3>Setting Up Angular for Production</h3>
<p>For production builds, run:</p>
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<pre class="language-javascript"><code>ng build --prod
</code></pre>
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<p>The output files will be in the <code>dist/</code> folder, optimized for deployment.</p>
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<h3>Troubleshooting</h3>
<ul>
<li><strong>Angular CLI not found</strong>: Ensure <code>npm install -g @angular/cli</code> was run with administrator permissions.</li>
<li><strong>Port in use</strong>: If <code>http://localhost:4200</code> is occupied, specify another port:
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<pre class="language-javascript"><code>ng serve --port 4300
</code></pre>
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</li>
</ul>
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<h3>&nbsp;</h3>
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