Ryan Dahl is the original creator of the Node.js runtime environment in case if you are not aware. After Node.js, he went on developing a new project called Deno. He introduced it in 2018 and after spending almost two years, Deno’s official version 1.0 was released on May 13, 2020.
This article aims to draw your attention to Deno and its important features. This blog clears all your confusions related to Deno and Node JS Development.
What Is Deno?
Note: The current stable version of Deno is 1.5.4 and it is released on November 23, 2020.
The Idea Behind Creating Deno
- Will Deno Replace Node.js?
- Is Deno A Next Node.js?
- Is Deno A Node.js Killer?
These are the titles you observe over the web when you search for it. As it is from the same creator, the majority of the people have this impression that Deno will replace Node.js anytime soon.
Here’s The Truth:
Deno is not created with an aim to replace Node.js. The idea behind creating Deno is to address a wide range of problems through a powerful scripting environment.
The idea behind Deno is their creators’ words:
As Node.js is widely used by companies, and a lot of apps are powered by Node.js, it is difficult to make any fundamental change. Deno addresses all these problems and attempts to make the scripting environment fun to work with.
Good Read: Top 20 World-Famous Companies Using Node.js
Their creators mentioned that Deno is not a fork of Node.js – it’s a completely new implementation. It is still in development and continuously evolving. It will take more time to get it matured and stable.
Let’s know Deno in detail.
What Are The Features Of DenoJS?
Important Features of Deno:
- Secure by default
- Out of the box support for TypeScript
- Easy installation without any dependencies
- A more complete and modern library
- Decentralized package management
Let’s discuss each in detail.
Deno is by default secure whereas Node.js runtime has access to almost everything including environment variables, reading/writing to the file systems, making network requests, and many more. When you run a Node program, it has access to almost everything and there is zero security.
This has been changed in Deno. There is no file, network, or environment access. If needed, it required to be explicitly enabled. Scripts can’t access any hard drive, open network connection, or perform any action without permission. Permissions must be given for accessing hardware, file, or network. Deno code is executed in a secure sandbox by default.
Out-of-the-box Support for TypeScript:
Deno is easy to install through only one executable file. There is no need to download any extra libraries and set up a development environment. Install it within a few clicks and start developing, it’s that easy!
A More Complete & Modern Library:
Decentralized Package Management:
Good news for the developers again! There is no package.json file! Deno has its own package manager, unlike Node’s NPM. As we know, when you install any package through npm, all required dependencies needed to be installed and that increases complexity. Deno’s decentralized module system works great here. It offers some built-in tooling to access third-party modules. You can import third-party code or package via HTTP URLs using a syntax that is familiar to modern JS and Angular. Packages are cached locally so that it doesn’t require to be loaded on every run.
Deno is different than Node.js in many things. Let’s compare the Deno vs Node performance and see how they differ.
Deno vs Node: A Quick Comparison
|Tech Stack||V8, tokio, Rust||V8, Libuv, C++|
|Security||Zero built-in mechanism||CLI flags (built-in secure)|
|Initial Release||In 2009||In 2018|
|Popularity||Very popular||Evolving phase|
|Package Manager||NPM||Does not use NPM, uses modules referenced as URLs, file paths|
|Community||Wider and strong||Continues to mature and evolve|
So, What Does Future Looks Like For Deno?
Due to the same creator and TypeScript support, it has quickly gained the attention of the developers’ community worldwide. Companies will start using it and experiment with different use cases. Meanwhile, Deno is making progress with its improvements, new features, and user base.
Will Deno Replace Node?
Deno is still in the development phase and it is not built with an aim to replace Node.js. It is similar to Node.js but overcomes Node.js’s loopholes in a better way.
Is Deno Faster Than Node?
It is early to say which is faster. Deno’s advanced libraries and modern JS help it perform better in a high-traffic environment.
Should I learn Node or Deno?
If you have experience working with Node, you will be able to learn Deno in minutes. Deno is not yet powerful as Node.js but experience in Node.js will definitely help learn Deno faster when it matures.
Does Deno Use NPM?
No, Deno has its decentralized package management and does not use NPM.
What is Deno Used for?
Is Deno a framework?
No, Deno is a server-side code execution environment and there are many frameworks being built for Deno.
Should I use Deno?
It depends on the requirements. Deno is still in the development phase and continues to evolve.
Is Deno Compatible with Node?
In general, Deno is not compatible with Node (NPM) packages. It offers a compatibility layer at present but it is not yet completed. In the future, the Deno community plans to support more and more Node programs and out-of-the-box support for it.