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How To Install Npm Packages
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Installing Node.js and npm on Windows is very straightforward.

First, download the Windows installer from the Node.js website. You will have the choice between the LTS (Long Term Support) or Current version.

The Current version receives the latest features and updates more rapidly
The LTS version foregos feature changes to improve stability, but receives patches such as bug fixes and security updates

Once you have selected a version meets your needs, run the installer. Follow the prompts to select an install path and ensure the npm package manager feature is included along with the Node.js runtime. This should be the default configuration.

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Restart your computer after the installation is complete.

If you installed under the default configuration, Node.js should now be added to your PATH. Run command prompt or powershell and input the following to test it out:

Npm can be used as a task runner, and almost every module and project will have a test script that runs to make sure everything is good. In order to help remind you to do this, npm puts a 'always failing' test in there by default. First, create a file called test.js. It doesn't have to do anything, really. (This is npm class, not testing class.). Delete the nodemodules folder, then re-run npm i (this is short for npm install). Npm will re-install Underscore v1.9.1, even though we just saw that v1.9.2 is available. Normally, it’s relatively straightforward to link and install our package locally to apps, without having to publish to NPM first. This would be done by using the npm link command inside of our packages root directory. Then, navigating to an app and typing npm link me then npm i nstall.

The console should respond with a version string. Repeat the process for npm:

If both commands work, your installation was a success, and you can start using Node.js!

More info on Node.js

According to its GitHub repository, Node.js is:

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Node.js is an open-source, cross-platform, JavaScript runtime environment. It executes JavaScript code outside of a browser. For more information on using Node.js, see the Node.js Website.

A breakdown of Node.js facts:

Node.js is a JavaScript runtime built on Chrome’s V8 JavaScript engine.
Every browser has a JavaSript engine built in it to process JavaScript files contained in websites. Google Chrome uses the V8 engine, which is built using C++. Node.js also uses this super-fast engine to interpret JavaScript files.
Node.js uses an event-driven model.
This means that Node.js waits for certain events to take place. It then acts on those events. Events can be anything from a click to a HTTP request. We can also declare our own custom events and make Node.js listen for those events.
Node.js uses a non-blocking I/O model.
We know that I/O tasks take much longer than processing tasks. Node.js uses callback functions to handle such requests.

Let us assume that a particular I/O task takes 5 seconds to execute, and that we want to perform this I/O twice in our code.

Python

Node.js

Both look similar, but the time taken to execute are different. The Python code takes 10 seconds to execute while the Node.js code takes only 5 seconds.

Node.js takes less time because of its non-blocking I/O model. The first call to my_io_task() starts the timer and leaves it there. Photo mirror free installer. It does not wait for the response from the function. Instead, it moves on to call the second my_io_task(), starts the timer and leaves it there.

When the timer completes it’s execution taking 5 seconds, it calls the function and prints done on the console. Since both the timers are started together, they complete together and therefore take same amount of time.

Socket.io

Socket.io is a Node.js library made to help make real-time communication between computers possible. To ensure this Socket.io uses WebSockets to establish a connection between the client’s browser and the server. This library uses Engine.IO for building the connection.

Demos

How To Install Npm Packages

To get a taste of what is possible, Socket.io provides two demos to show it’s possible use-cases. You can find the demos at https://socket.io/demos/chat/ and find the link to the whiteboard demo on the left.

Get Started

Since Socket.io is a Node.js library you have to make sure that Node.js is installed. If it’s not set up yet get the latest version at Nodejs.org

macOS

Node.js can also be installed via Homebrew a package manager for macOS.

Just type brew install node Nokia care suite free download offline installer web file hippo download. to install Node.js.

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A get started guide can also be found on Socket.io’s page. It shows how to easily build a real-time chat in just a couple of lines.

More information

More information about Socket.io and it’s documentation can be found at: