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Javascript

JavaScript Fundamentals

Introduction to Javascript Javascript in webpage Installing Node.js

Basics of Javascript

Variables and Data Types Operators Conditional Statements (if, else if, else) Loops (for, while, do-while) Functions Scope and Hoisting Arrays Objects Strings Numbers and Math Dates and Times

DOM Manipulation

What is the DOM (Document Object Model)? Selecting and Manipulating Elements Handling Events Changing HTML and CSS with JavaScript

Javascript Events

Event Listeners event object Event Propagation Event Handling Best Practices

Error Handling

Common Types of Errors Try...Catch Statements Debugging Tools and Techniques

Asynchronous JavaScript

Callbacks Promises Async/Await Working with AJAX and Fetch API

ES6 and Modern JavaScript Features

Arrow Functions Template Literals Destructuring Classes Modules Promises and Async/Await (Revisited)
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Installing Node.js

Installing Node.js

Node.js is a runtime environment for executing JavaScript on the server-side. It allows you to build powerful and scalable server applications using JavaScript. In this section, we will guide you through the process of installing Node.js on your machine.

1. Why Install Node.js

Before we dive into the installation process, it's essential to understand why you should install Node.js:

  • Server-Side Development: Node.js is commonly used for server-side development, allowing you to create web servers and APIs.

  • NPM: Node.js comes with the Node Package Manager (NPM), which is a vast ecosystem of open-source libraries and tools. You'll use NPM to install packages and manage dependencies for your projects.

  • Cross-Platform: Node.js is available for multiple platforms, including Windows, macOS, and Linux, making it a versatile choice for developers.

2. Downloading Node.js

To install Node.js, follow these steps:

  1. Visit the official Node.js website at https://nodejs.org/.

  2. You will see two versions available for download: LTS (Long-Term Support) and Current. It's recommended to install the LTS version for stability unless you specifically need features from the Current version.

  3. Click on the LTS version to download the installer for your operating system (e.g., Windows, macOS, Linux).

3. Installing Node.js on Windows

If you are using Windows, follow these steps after downloading the installer:

  1. Run the downloaded executable (.msi) file.

  2. The Node.js installer will guide you through the installation process. You can accept the default settings unless you have specific preferences.

  3. After completing the installation, open the Command Prompt or PowerShell and run the following commands to verify that Node.js and NPM have been installed:

    node -v
npm -v

    These commands should display the installed Node.js and NPM versions.

4. Installing Node.js on macOS and Linux

For macOS and Linux users, follow these steps after downloading the installer:

  1. Open your terminal.

  2. Navigate to the directory where you downloaded the installer.

  3. Use the package manager for your system to install Node.js. For example, on macOS with Homebrew:

    brew install node

    On Linux (using APT for Debian/Ubuntu):

    sudo apt-get install nodejs

  4. After installation, verify Node.js and NPM versions by running the following commands:

    node -v
npm -v

5. Updating Node.js and NPM

Node.js and NPM are actively maintained and updated. To keep your installation up-to-date, you can run the following commands:

  • To update Node.js:

    npm install -g n
n latest

  • To update NPM:

    npm install -g npm

Congratulations! You've successfully installed Node.js on your system. You're now ready to start building server-side applications and working with JavaScript on the server.

In the next section, we'll introduce you to some basic JavaScript concepts to get you started with coding in Node.js.

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