The Differences Between Deno and Node | Hacker Noon

@sidharth-jainSidharth Jain

Founder at | Developing Tech products for startups with billion dollar dream

What is Deno?

Deno a pristine method to compose worker side JavaScript. It solves many of the problems of Node. It was created by the same person as Node. It uses the V8 JavaScript engine under the hood but the rest of the runtime is implemented in Rust and typescript.

Now the question arises for what reason does Deno utilize rust?

Deno may be a safe TypeScript run-time on Chrome V8. It had been initially written in Go and now has been revamped in Rust to remain far away from potential garbage collector issues.

Deno is like Node js yet is centered around security. The rationale that Deno made was JavaScript. Significantly more horrendous than having a competitor who understands your thing back to front, Deno was made expressly to fix what Dahl saw due to the crucial weaknesses of NodeJS — including security issues, use of a centralized repository system (npm), and heavy tooling.

Advantages of using Deno

It Uses ES6 module guidelines. It is compatible with Typescript with Deno: there’s no compelling reason to rearrange and style Typescript for you, it simply works out-of-the-box.

It is implicit Rust may be a blasting quick programming language that enables individuals to construct solid and productive software. It has great built-in security.

What is Node?

Node.js is an open-source, JavaScript runtime environment on Chrome’s V8 that allows you to effortlessly develop fast and scalable web applications.

It uses an occasion-driven, non-impeding I/O model that makes it lightweight, proficient, and superb for information concentrated ongoing applications that meet common gadgets.

Node js can affect numerous simultaneous requests. This is often the elemental explanation; it immediately was documented among designers and massive organizations.

Node can affect numerous simultaneous requests without stressing the developer. It’s the quickest run time among all programming languages, due to the prevailing language and the help and support by the many programs.

Future seems, by all accounts, to be splendid for Node within the front-end world because it looks like no front-end improvement is conceivable without Node in any event until further notice.

Deno vs Node: Detailed Comparison


Deno takes security seriously and gives it a priority. It executes the code in a sandbox as opposed to Node so by default our program does not have access to the file system, network, environment, variables, and the execution of the other scripts.

If we want to use these resources we have to ask for the permissions or use the corresponding security flags when we run our scripts.


The typescript compiler is baked into Deno by default all you have to do is to name your files with Dot T as an extension and you can use typescript in your code.

After it, you need any confirmation or installation. On the other hand, In Node, you have to install a typescript update package.json, add a TS config file, and also make sure that your modules have type support.

Browser API:

Unlike Node, Deno has access to the browser API, which means that you can use anything from the browser API without installing any additional packages.

For example, you can use fetch out of the box. While in Node, you have to install the Node fetch package. You have native access to window objectives that lead to cleaner and lesser packaging ports.

ES Modules:

Deno fully supports ES modules so we can use imports just like you use it in react.

For instance, the ES module has two major advantages over require which is that the node way of importing dependencies is loading resources synchronously while importing is synchronous, which is more performant also with the import, you can load only the package that you need and save memory.

Decentralized Packages:

With Deno, you can forget NPM packages and big-sized Node modules folders. Packages are instead imported from URL and cache to the hard drive on load. This means that the imported dependency is cached, and you don’t have to download it again if you have to use it anywhere else.

Honorable mention testing:

Deno has an Inbuilt test runner that we can use for testing our JavaScript or typescript code. With the same text, you will be familiar, if you are comfortable with the popular JavaScript testing libraries like Just or Jasmine.

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