What is Deno and Will it Replace Node.js

What is Deno and Will it Replace Node.js

Knowing about “What is Deno and Will it Replace Node.js” is quite something now and know whether the replacement of Node.js is true or not. Keep reading.

What Is DENO?

Deno is a secure runtime for javascript and typescript that is based on Google’s V8 javascript engine and the rust programming language. It was created by the original creator of Node.Js, Ryan Dahl, and is focused on productivity as he said. It was announced by Dahl in 2018 during his talk “10 Things I Regretted about Node.Js”. Deno focuses on the role of both the runtime and package manager within a single executable.

Deno is basically just an anagram of node.js. It is like are placement but not basically replacing it without knowing
what you are doing. It was basically created to breach the flaws of Node.Js.

Now let’s talk about what makes Deno so good.

  • Secure by default. No file, network, or environment access, unless explicitly enabled.
  • Supports TypeScript out of the box.
  • Ships only a single executable file.
  • Has built-in utilities like a dependency inspector (deno info) and a code formatter (deno fmt).
  • Has a set of reviewed (audited) standard modules that are guaranteed to work with Deno: deno.land/std

As you can infer from deno is quite good. So let’s see

Deno’s Comparison with Node.js

Deno and Node.js are both runtimes built on Google’s V8 JavaScript engine, the same engine used in Google Chrome. They both have internal event loops and provide command-line interfaces for running scripts and a wide range of system utilities.

Deno mainly deviates from Node.js in the following aspects:

  1. Uses ES Module as the default module system, instead of CommonJS.
  2. Uses URLs for loading local or remote dependencies, similar to browsers.
  3. Includes a built-in package manager for resource fetching, thus no need for NPM.
  4. Supports TypeScript out of the box, using a snapshotted TypeScript compiler with caching mechanisms.
  5. Aims better compatibility with browsers with a wide range of Web API.
  6. Allows a control to file system and network access in order to run sandboxed code.
  7. Redesigns API to utilize Promises, ES6, and TypeScript features.
  8. Minimizes core API size, while providing a large standard library with no external dependencies.
  9. Using message passing channels for invoking privileged system APIs and using bindings.


Deno ships as a single executable with no dependencies. You can install it following the instructions from this page, or download a release binary from the releases page.


After reading this “What is Deno and Will it Replace Node.js” article, you should have gotten a good grasp on the Deno framework. Whether Deno will later replace Node.js is entirely not visible now.

Learning a new technology such as Deno is a big effort. The suggestion is that if you are starting now with server-side JS and you don’t know Node yet, and never has written with TypeScript start with Node.

Although Deno is an excellent runtime environment for our programs, it is still in its early stages. Node.js is still a giant, well supported, and well established, but in the future, Deno could be a great alternative.

Thank you very much for reading this post! I hope you found it useful and don’t forget to share and keep coming back here.

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