Technologies are getting secure and adaptable with an introduction of advance tools and methodologies. Every browser needs sustainable runtime environment for running web application in an external browser. There is a great buzz going in the market regarding comparison between Node Js and Deno. In this blog, we will be covering some depth information about Deno and also compare it with Node Js.

Deno Js is a simple and well-designed runtime environment that is used for both JavaScript and TypeScript. It is built with rust programming language and that makes it a great option for developing any gaming application. The security is considered as primary focus point of Deno and it also consists of well-designed modules.

There are multiple benefits of using Deno over other runtime environment and some of them are listed below



 Every package in Deno is usually loaded from the URL and hence user need not to install it specifically from NPM at first. Therefore, it is faster and needs less time to manage all the package installation.

No Configuration is required for typescript: 

Adding Typescript together with Node Js will be a complicated process and we need to follow a long process to get them work together. Deno already having TypeScript feature added to it and user just need to add .ts extension to add TypeScript compiler.

 Node Js don’t have direct access to any browser API and that means we cannot able to natively call required fetch function. We have to follow long step process to call fetch function in Node Js by installing package and then importing it using necessary command. Deno makes this process easier as it has direct access to window object and that allows user to directly call fetch function.

 Another most important features that makes Deno stronger than Node Js is availability of multiple built in libraries. It enhances overall productivity as well as demand of this tool in the market.

There are some similarities in between both the runtime environment and they are listed below

Both Node Js and Deno is used to build backend services for API that is utilized in mobile or web application.

Deno is also used to communicate with some database just like Node Js.

Both approaches plays a vital part in sending emails as well as in storing various files.

The question that is still coming to our mind is that why should we use any alternative of Node Js for running an application. Node Js is a strong runtime environment that is compatible with every platform and so why should we actually think about any alternatives. There are some best features that makes Deno a strong option for running application and some of them are discussed below

Deno is a simple and easy tool that requires no prior knowledge for implementation. It is also considered as the best tool for prototyping as well as agile development.

Deno is highly preferred by developers as it saves so much time in developing an application. It also has faster response time as well as speed and that makes it highly productive.

This tool is secure by default and access to any files, network or environment is not granted until it is enabled by user.

The primary benefit of using Deno Js is that it uses all the features as well as code base of TypeScript.

Ryan Dahl is an original creator of both Node Js and Deno runtime environment and he noticed some major drawbacks or faults in Node Js structure. Deno 1.0.0 was released on May 13, 2020 and first released was declared stable. Deno includes First class TypeScript support and that is missing in Node Js. Deno is written using Rust programming language and that itself is growing so fast results in increasing demand of the tool. Some other features of 

 that are not present in Node Js includes type checking, properly designed modules, centralized distribution and many others. Deno also can easily breaks any unhandled exceptions and this features are not available in case of Node Js.


There are some simple steps that we need to follow for installing Deno in our system and they are listed below

At first we need to go to Deno website and that is Deno.land. Then we will find multiple ways to install Deno and it depends on operating system.

There are various methods that can be utilized for installing Deno and we will be using PowerShell method to complete installation.

The command that can be used for installing Deno in Power shell is mentioned below

Iwr https:// deno.land/x/install/install.ps1 –useb | iex

The command that is mentioned above will start installing Deno and it will take some sufficient permission from user.

Once the installation is completed, then user can run and check with any command. For example, user can write 

and then it will list out all the variables and subcommands of it. The command 

can be used to check actual version of deno that is installed in the system.

Implementing Deno using Visual Studio code

There are many editor and extension that can actually be used to implement Deno and visual studio code is best among them. There are some basic steps that user actually needs to implement for executing deno using this application and they are listed below

Download visual studio code application from link 

Select tool for downloading from the available option according to Operating system of system

Open Visual Studio code and install Deno extension by clicking on last bottom icon placed in the left side.

Click install button on Deno option and after installing it will add Deno support for visual studio code.

Now create a directory in power shell to get started. The command for creating directory is 

After that we have to enter inside the folder (hello deno) and for that we will be writing the command cd hello and then click tab to auto complete it.

. command to open visual studio code directly using power shell.

Now, we can create a new project or file by clicking on folder icon available in the left side denoted as 

The extension should be .ts as it denotes the extension of typescript file. Therefore, the file name should be 

The debugging of Deno code can be implemented or done from google chrome as well as using visual studio code.

Click on run in visual studio code application

Click on Add configuration from the options and then select Node.js

Remove already existing code from there and paste code that is mentioned in the 

and that indicates entry point parameter of all application.

Now click on Run button that is available on the left side of application and denoted by play button symbol

We will be getting error as we have not added unstable flag and so we need to add “—unstable” keyword in the runtime argument code before “server.ts”.

Click on Run button again after adding the above syntax and it will starts debugging.

Deno is having multiple features and methods that makes it more user friendly and flexible for use. The points that are covered in this blog clearly concludes Deno as strongest option comparing to Node Js for running various web and mobile application in external browser. The best part of implementing an application using Deno runtime environment is addition of TypeScript with just simple steps. Deno also provides extra layer of security and well-developed modules to the user for executing an application. It is necessary to keep various factor in consideration such as security, implementation time, response time, compilation support and features to decide best solution for running any web application. However, Node Js is still a giant in technology sector and replacing it will take time for Deno. I hope you find this blog useful.



A Beginner Guide To Deno Core Basic- Learn Deno 2023

Deno is a modern and secure runtime language for Javascript and Typescript. It is very similar to Node.js
The advantages of using Deno are:

By default Deno does not have access to the network, filesystem, and environment variables. We have to explicitly grant these permissions.

Deno has a set of Apis that are compatible with API web standards like fetch, FormData, URL, URLSearchParams, Worker, atob, btoa, and more.

Deno has a list of standard modules that are guaranteed to work with a specific Deno version such as UUID, hash, HTTP, and more. These modules are maintained by Deno maintainers.

Deno has built-in utilities such as formatted, linter, test runner, and document generator.

After knowing about Deno. Since Deno is considered a successor to the famous Node.js. Let's understand the difference.

What is the difference between Deno and Node.js?

these are the some common differences between these languages.you can see it on given table

Based on your operating system select the option.

I am using windows and I am using chocolatey. So I will use the command


After that, open PowerShell and run the command.

Run deno –version to confirm you have successfully installed Deno. Please use PowerShell with administrative rights.

Deno can run JavaScript or TypeScript out of the box with no additional tools or config required.


This will provide you with important commands that can be used.

Mostly we use deno run command that we use to run a file. We can also get all types of run commands by entering deno help run

Mostly we use 

 command that we use to run a file. We can also get all types of run commands by entering 

This will give you more information about deno run commands. As you can see most of the run commands require permission.
Let's try some of the run commands that do not require permission. For this, we will write typescript code in the basic folder. I will create a file app.ts.
Run the basic hello world program.

Deno comes with web api by default. In node, we don’t have a web API. Let’s see them in practice.

In setting—>jsonsetting enter deno.enable =”true”

We have to give permission to allow network access 


Here we are using web API to fetch data and then consoling in the program.

This is used to fetch large binary objects including media and files. We are just using array values to show you this example.

More details of web API can be found here: 

Besides web APIs deno has specific APIs which generally starts with deno. Some of these apis are read and write files. Let’s see them in action.

There are several ways/APIs to read in deno. We are going to learn and talk about three of them.

This is an asynchronous function so we have to use await in this. We have to give permission to read deno –allow-read app.ts

Read text file return a promise with a string value.


This is an asynchronous function so we have to use await in this. We have to give permission to read deno run –allow-read app.ts. But this will return the promise of value uint

You can decode the text of the string using

PS C:\Users\4 way technologies\Deno\basic\basic> deno run --allow-read app.ts
Uint8Array(27) [
87, 101, 108, 99, 111, 109, 101,
32, 116, 111, 32, 68, 101, 110,
111, 32, 68, 101, 118, 101, 108,
111, 112, 109, 101, 110, 116
]
Welcome to Deno Development

To read the file using this function we need to open the file first this also returns the promise value in uintarray8


With output

PS C:\Users\4 way technologies\Deno\basic\basic> deno run --allow-read app.ts
Uint8Array(27) [
87, 101, 108, 99, 111, 109, 101,
32, 116, 111, 32, 68, 101, 110,
111, 32, 68, 101, 118, 101, 108,
111, 112, 109, 101, 110, 116
]




Learn Deno and its Basics Part-1

The new runtime for JavaScript, TypeScript and WebAssembly dubbed Deno was initially introduced in 2018. It is written using the V8 engine and Rust as the programming language. Deno's creator, Ryan Dahl aims to institute it as a standalone tool for swiftly scripting complex functionality.

Deno has quickly established itself as the prime competitor of Node.js in providing web service processes associated with services involving client-side applications. It is undoubtedly a daunting position for an enterprise like Deno to go into a head-on battle with a giant like Node.js. The slightly longer time taken by Deno for take-off is often attributed to this. To keep up with the Node.js behemoth, Deno was bound to have difficulties. However, with a recent turn of events in terms of investments, it should now be able to find its audience with the support of further financing.

Deno has recently attracted a 21 million USD Funding

Lately, Deno has frequently been viewed as the answer to the ongoing issues with Node.js development. Deno has its flaws to look after as well. These include an inadequate module system, security concerns, as well as the package manager might be replaced with a typical URL-based linking system, as is commonly highlighted.

Deno Land Inc., the firm that created Deno, reported in June of this year that it had received $21 million in a Series A investment round spearheaded by Sequoia Capital. This sum might go a long way toward filling in the remaining spaces in Deno. Deno invests further in a business plan that will set itself apart from its rival in addition to having the funding to contend with Node.js for a lion’s share of the market.

Deno can now be expected to be set to bridge the gaps present with Node.js

With the new investment, Deno is probably going to start by improving the technical ecosystem. In each technology ecosystem, third-party software is a vital component. They are motivated by the necessity of innovations, yet there isn't much work being done on a platform that isn't extensively used, and there isn't much work being done on a system that isn't thoroughly maintained or well-documented either. It can be useful to be aware that if an issue emerges when creating using a technology that doesn't have sufficient third-party packages, there is likely a limited abstraction possibility for that. Of the over 12 million packages in Node.js, Deno has only about 5,000 third-party packages. It is discernible that this right now requires thorough attention.

There is a need to add some organization to the project for presenting Deno as a stronger rival to Node.js. The hosting branch of Deno, Deno Deploy, is the perfect solution to that. In spite of last year's release of Deno Deploy, this "cloud service for hosting JavaScript servers" is continuously being improved. According to the company's literature, "by repurposing web browser technology for server software, we aim to accelerate a new generation of extreme low-latency edge applications." Deno Deploy is even a straight redirect from Deno.com itself.

For competing with the several frameworks that are compatible with Node.js as third-party packages. Deno also published its very own proprietary frontend framework, Fresh, in late June of this year. Fresh supports Typescript right out of the box and is built on the Preact Virtual DOM.

With New funding, deno is set to challenge Node.js

The prime aim behind introducing Slack was to improve collaboration among developers. After getting a fair idea of what Slack can bring to the table, users could consider the APIs of Slack to share new products and reconstruct the approach of teamwork. Given the dependency on Slack that has accrued over the years, there is a need to evolve this platform with modern technology.

This is the basis of collaborating with Deno and bringing in innovation in Slack.

Deno is not referred to as a programming language but a reliable runtime for TypeScript and JavaScript. It is based on the Rust and V8 JS engines. Developed with an aim to address the issues faced in using Node.js. Introduced by the creator of Node.js, it is extended for JavaScript XML, WebAssembly, and TypeScript extension.

The key consideration for choosing Deno is to maintain the value proposition of Slack. There are other following considerations that made the association effective.

The security that Deno’s architecture offers benefits developers to achieve more granular controls over the built-in. For instance, they can run the code even if they have restricted access to the external domains or the main file system. This way developers can protect their data and design.

Deno is the fastest JS runtime backed up with the V8 JS engine of Chrome. Since speed is one of the important criteria of Slack that they want to offer to users, Deno is the perfect solution. It has paced up both the decision-making process and communication.

While using Slack, users don't need to focus on the infrastructure and setup management. This platform is all about improving functionality. With the integration of Deno and Slack CLI, users can focus on improving their codebase rather than putting in effort on installing dependencies.

The collaboration has evidently enhanced the convenience of developers. Using Deno's support from TS, they can release a new SDK in no time. They can use a self-executing binary to speed up the installation and CLI integration process. With Deno’s different plug-ins, they enjoy greater flexibility and attain an integrated development environment.

The new platform introduced in Slack has allowed developers to build their projects with Slack’s open beta.

The faster transition from idea curation to deployment

The advanced developer tools supported in this platform include Slack CLI, Built for Bolt, Run on Slack, Logging, App manifests, and Datastores. With these tools, developers can shorten the distance between idea development to project deployment.

Slack CLI supports fast development by scaffolding, creating, and deploying apps and functions.

With Run on Slack, developers can automate the deployment process, backed up with managed and secure Slack infrastructure.

With Logging, developers can get access to app-level and function-level logging. This helps in the app debugging process.

With reusable and shareable manifest files, users can save time in configuring apps.

With Datastores, it is convenient to retrieve and store data in the Run On Slack applications.

Built for bolt is the new development framework. Users can extend different platform functionalities to the existing applications.

The next-generation platform of Slack has allowed users to message others with metadata. They don't need to deal with complicated APIs. Anyone can now develop apps and workflows with the provided metadata making communication more robust.

Now, with shareable and modular building blocks, the development process has been simplified. Users can build modular functions for strengthening the service connection and automating tasks in Slack. Users can get desired workflows with predefined and custom functions of slack. Users can add their triggers to the existing workflows.

A brand new Slack platform in collaboration with Deno

Deno presents a new way to write server-side JavaScript and TypeScript. Since it uses the V8 JS engine and is built in Rust, it is extremely fast. Although it is still in the development phase, most developers have heralded it as the ‘Programming Language of the Future’. It is expected that within five to six years, more companies would migrate from Node.js to Deno.js (successor to Node.js).

Now you may ask why? Well, Deno.js has a number of advantages. It is extremely secure, and developers have to grant permission for execution of a task. Furthermore, Deno.js has a simplified module system, no package.json, decentralized packages, top-level await, browser-compatible codes, just to name a few.

So, without further ado, let us delve into how to get started with Deno.

You have to type the following command in Windows Powershell:

You have to type in the macOS and Linux Shell:

If you are using Homebrew in Mac, then you will have to type:


Since I’m using a Windows system, I’ll use the first code. Here is the consequence/output


How to Ensure that Deno is Installed in the System?

Next, you have to be sure that Deno.js has been successfully installed in the system. For this, you have to go to Command Prompt, or you can carry out this function in the Windows Powershell itself.

(Note: If you are macOS or Linux user, you have to use the Terminal or the Shell)

Once you type this, you will get to see: how to start the REPL, execute a script, evaluate a code in the shell, USAGE, OPTIONS, SUBCOMMANDS, and ENVIRONMENT VARIABLES.

Thus, you get a confirmation that the Deno.js has been successfully installed in the system.


How to Create a Directory to Start Programming in Deno?

If you wish to save all the projects in a safe place, your best bet would be to go for deno-workspace. Again, in order to create the directory, you can use the Command Prompt or Powershell (in WIndows).

I have VS Code opened for the execution of the program, so I’ll type in the Powershell

A new VS Code window opens. We create a source file named ‘hello.ts’ which means we will be writing in TypeScript. And we create the file inside the ‘hello’ directory that we created.


How to Write a ‘Hello World’ Program in Deno?


Inside the ‘hello.ts’ file, we just have to write the following statement.

The console.log() method helps us in sending an output to the web console. Now, the message may be in the form of multiple JS objects or as simple as one line string.

And if we run the program in the Terminal of VS Code by typing 


How to Write the ‘Hello World’ Program by Using the Command in the Official Deno Page?

. And you will see that you can run the program locally taking the help of the Deno CLI.

You can either open Terminal of VS Code (or Powershell) or Command Prompt. And paste this command.

https://examples.deno.land/hello-world.ts


Hopefully, you were able to understand how you can setup Deno.js and run a simple program like ‘Hello World’. Keep following the tutorial blog series in order to gain an insight into the relatively new language and achieve proficiency in it.

Latest Deno Developments Blogs

A Beginner Guide To Deno Core Basic- Learn Deno 2023

Learn Deno and its Basics Part-1

With New funding, deno is set to challenge Node.js

A brand new Slack platform in collaboration with Deno

Getting Started with Deno: Setup and Hello World Program

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