Web Hosting Javascript

Web Hosting Javascript – In 2009 Ryan Dahl released Node.js which expanded the scope of what developers could do with JavaScript. In the past, you could only use JavaScript on the client (browser) or front-end of web applications.

This article is not a tutorial on how to use Node.js (resources for that can be found in the last part of this article). Instead, it’s an introduction to what Node.js is, its features, and what it’s used for.

Web Hosting Javascript

Web Hosting Javascript

If it’s too complex to understand, you should think of it this way: Node.js is JavaScript that runs outside the browser – on the server.

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The goal is not to compare Node.js with other back-end technologies, but to help you understand some of its functionality.

Node.js is fast at executing tasks (receiving requests and sending responses) because of its single-threaded and asynchronous nature.

Single-threaded, meaning Node.js has a single source for handling requests. Multithreaded backend technologies assign a new thread to each new request.

You can think of a thread as someone serving multiple people. A very familiar real-life example would be a restaurant. We will explain this example further along with the asynchronous part of Node.js.

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A customer arrives at a restaurant and sits down to wait for a waiter. The server comes to the customer’s table and takes their order. The order is then delivered to the kitchen.

But the server doesn’t wait until the request is ready before moving on to the next client. Customers will return with what they ordered when it is ready; Meanwhile, the server moves to the next client and repeats the same process.

The example above is similar to how Node.js works under the hood. It is capable of processing multiple requests using a single thread asynchronously (without waiting for one request to complete before proceeding to the next request).

Web Hosting Javascript

The single-threaded, asynchronous nature of Node.js makes it extremely fast and ideal for building data-intensive, real-time applications.

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Another benefit of using Node.js as a web developer is the ability to use JavaScript on both the front and back end of your web application.

Before the release of Node.js, web developers had to learn another programming language to build the backend of their web applications.

Of course, some developers use different languages ​​for their backend, but Node.js makes it easy to use just one language, if you will, JavaScript.

Node.js is built on Google’s V8 JavaScript engine, which has very high performance. This allows Node to perform requests quickly.

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Node.js supports many major platforms. So you can write your code and it will run on Windows, MacOS, LINUX, UNIX and even some mobile devices.

Now that you’ve gotten a brief introduction to what Node.js is, its features, and what it’s used for, here are some resources you can use to learn how to use Node.js:

Learn to code for free. Open Source Resume has helped more than 40,000 people get a job as a developer. Once you’re done writing the code and organizing the files that make up your website, you need to put everything online for people to find. This article explains how to get your simple sample code online with minimal effort.

Web Hosting Javascript

Publishing a website is a complex matter, as there are many ways to do it. This article does not attempt to document all possible methods. Instead, he outlines the pros and cons of three approaches that are practical for beginners. He then goes into a method that may work instantly for many readers.

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To have more control over the content and appearance of the site, most people choose to purchase web hosting and a domain name:

Additionally, you’ll need a File Transfer Protocol (FTP) program (see How Much It Costs: Software for more details) to actually transfer the website files to the server. FTP programs vary widely, but in general you must connect to your web server using the details provided by your hosting company (usually username, password, hostname). The program then shows you your local files and your web server files in two windows, and lets you transfer files back and forth.

There are several web applications that simulate a web development environment, allowing you to enter HTML, CSS, and JavaScript, and then display the result of that code as a web site, all in a browser tab. In general, these tools are relatively simple, great for learning, good for sharing code (for example, if you want to share a technique or ask colleagues in another office for help with debugging), and free (for basic functions). They host your rendered page at a unique web address. However, the features are limited, and these apps usually don’t offer hosting for assets (like photos). In general, a web application has 2 types of properties: static and dynamic. Static assets don’t change often: Logos, banner images, JavaScript, style sheets and other rich media content such as audio, video can be considered static assets. On the other hand, dynamic assets can be content that is loaded on the fly by its users or other systems.

In general, most web applications use a local file system or network attached storage (NAS) as their asset storage. Here is an example of a site that uses local file storage to host assets.

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In the example we have a web page located at http://domain.com/index.html with 2 images, a style sheet and javascript.

When a request is made to access Index.html, the web browser receives the response and parses the HTML, building a DOM tree from the HTML. However, new requests are made to the web server for each new resource found in the HTML source (typically for all images, style sheets and JavaScript files) – so in this example, there would be 5 requests to the web server.

Here’s why – consider a situation where domain.com is a high traffic website. The higher the traffic the higher the cost, you will need to scale the servers to meet the demand. What if we move the assets to an external CDN? According to the example above, out of those 5 HTTP requests, only one request will reach the nginx server – and all other assets will be served from the external CDN, saving bandwidth, computing resources such as CPU, RAM on the main web server.

Web Hosting Javascript

Another example is if your applications are deployed in a load-balanced environment with multiple web server instances, you’ll need to keep each instance updated with static content, and things get even more confusing with dynamic content because you have to copy assets. to all nodes or use shared storage. But with a CDN in place, you’ll need to copy them to one place: your CDN.

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This is indeed a theory – in my next CDN post I will try to compare these two approaches and see if it really works – in terms of performance improvement and cost savings.

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