Dorcas  Ferry

Dorcas Ferry

1600782507

Deno vs. Node : Everything You Need To Know

Do you know what is a Deno and will it replace NodeJS? Here we will discuss the Deno VS Node and key features of Deno with leading Node JS web development company.

What is Deno? Is it Better or Worse than NodeJS?

Deno is a popular Javascript framework that is suddenly being viewed as a competitive alternative to the NodeJS framework. The buzz about the Deno vs Node.js is quite loud now in the developer circle and as a NodeJS development company, you just cannot pretend not to hear about it.

In spite of the fact that NodeJS as of now stands ahead of the competition thanks to its full-stack ecosystem, Deno has its own specific plus points. Deno as a Javascript framework is capable of compiling JavaScript and TypeScript code at one go. That is quite impressive about Deno and that is why we are here explaining the promise of Deno against NodeJS. If you are a NodeJS development company, it is likely to concern you.

Key Features of Deno

Deno

Deno is a great JavaScript framework that allows compiling TypeScript code as well. The framework is tremendously secure and uses a V8 JavaScript engine for JavaScript. Let’s take a quick look at the key features of Deno.

  • The code of Deno is written in Rust.
  • The Tokio loop in the main Deno is also written in Rust.
  • It supports and compiles both JavaScript and TypeScript code.
  • It runs V8 JavaScript runtime engine.

#deno #node #javascript #web-development #programming

What is GEEK

Buddha Community

Deno vs. Node : Everything You Need To Know

A Review of Node.js and Deno: Everything You Need to Know

Deno is a JavaScript and Typescript runtime based on the V8 engine and Rust programming language. It’s the redevelopment of the runtime environment,  Node.js, that plays the role of runtime and a package manager.

Deno focuses on productivity and creates a secure scripting environment for modern programming. It’s distributed as a single executable, runnable with up to 25MB zipped executable. It also used a standard browser-compatible protocol for loading modules. Deno was built with Reno, Tokio, Typescript and V8.

Deno aims to present itself as a possible replacement for utility scripts previously written with Python or Bash. Deno’s features are intended to enhance Node.js’ functionalityies. Let’s look more closely at a few of the key features that distinguish Deno as a viable alternative to Node. Below, you’ll learn everything you need to about Node.js and Deno in this Deno review.

Comparison to Node.js

Node.js and Deno

Node.js is the most often utilized server-side and command-line JavaScript runtime environment. While it has gained insurmountable recognition and popularity since its inception in 2009, there have been many limits on the uses of Node.js .Here is the list of  NodeJS projects for beginners for all node enthusiasts to train your skill level and get hired for your dream job.

In 2018, founder, Ryan Dahl, announced the formation of Deno at JSConf.EU in a talk he titled,  “10 Things I Regret About Node.js”. Dahl expressed his concerns over several critical areas of the predecessor runtime, including the absence of async patterns, the internal build system, security architecture, and module management.

#node #deno #node #nodejs

Dorcas  Ferry

Dorcas Ferry

1600782507

Deno vs. Node : Everything You Need To Know

Do you know what is a Deno and will it replace NodeJS? Here we will discuss the Deno VS Node and key features of Deno with leading Node JS web development company.

What is Deno? Is it Better or Worse than NodeJS?

Deno is a popular Javascript framework that is suddenly being viewed as a competitive alternative to the NodeJS framework. The buzz about the Deno vs Node.js is quite loud now in the developer circle and as a NodeJS development company, you just cannot pretend not to hear about it.

In spite of the fact that NodeJS as of now stands ahead of the competition thanks to its full-stack ecosystem, Deno has its own specific plus points. Deno as a Javascript framework is capable of compiling JavaScript and TypeScript code at one go. That is quite impressive about Deno and that is why we are here explaining the promise of Deno against NodeJS. If you are a NodeJS development company, it is likely to concern you.

Key Features of Deno

Deno

Deno is a great JavaScript framework that allows compiling TypeScript code as well. The framework is tremendously secure and uses a V8 JavaScript engine for JavaScript. Let’s take a quick look at the key features of Deno.

  • The code of Deno is written in Rust.
  • The Tokio loop in the main Deno is also written in Rust.
  • It supports and compiles both JavaScript and TypeScript code.
  • It runs V8 JavaScript runtime engine.

#deno #node #javascript #web-development #programming

Charles Cooper

Charles Cooper

1594696901

Node.js vs Deno: What You Need to Know

Since its announcement, Deno has generated quite a lot of interest within the JavaScript community. As a JavaScript runtime designed by the creator of Node, you might expect there to be be a lot of similarities between the two projects, and there are. However, there are also important differences, meaning you can’t just substitute one for the other.

This article will take a look at Deno in relation to its “older cousin” to help understand what they have in common, and what sets them apart. (If you want to get the skinny on Deno first, check out our recent introduction.)

Language Support

Both projects are JavaScript runtimes, allowing JavaScript code to be executed on a computer outside of a web browser. Let’s look at how they stack up in terms of language support.

Node.js

The current LTS release of Node (v12.18.1 as of writing) supports modern JavaScript syntax and features. It also supports about 75% of the ES2020 spec. ECMAScript modules are also supported, but are currently only classed as experimental: you need to use the .mjs file extension, or add the property "type": "module" to your project’s package.json file.

In order to run TypeScript (or any other language) on Node, the code needs to be compiled to JavaScript that the V8 engine can execute. There are several different ways to do this, with different pros and cons, so getting up and running means having to choose one of these and follow the necessary setup process.

Deno

I was unable to find any mention of the JavaScript spec supported by Deno, but as it also uses V8 under the hood I would assume a similar level of support as in Node. My own tests show that Deno supports ES2020 features like Promise.allSettled() and the globalThis keyword. ECMAScript modules are the default, with CommonJS modules not supported unless you use the Node compatibility library (more about this later).

TypeScript is supported as a first-class language in Deno, meaning that it works out-of-the-box: no installing additional tools to transpile to JavaScript first. Of course, the V8 engine doesn’t support TypeScript natively, so Deno is still transpiling the code under the hood, but this is all seamless and transparent to you as a developer.

I also couldn’t find mention of which version of TypeScript Deno v1.0.1 uses, but it supports optional chaining and nullish coalescing (but not private class fields) which would peg it as TS 3.7.

APIs

Deno and Node both expose their own APIs to developers, allowing us to write programs that can actually do useful things like read and write files, and send and receive network requests.

Node.js

When Node was first released, there was no built-in support for Promises. As a result of this, most of the APIs for asynchronous operations were written to take an error-first callback:

const fs = require('fs');
fs.readFile('readme.txt', (err, data) => {
  if (err) {
    // Handle the error
  }
  // Otherwise handle the data
});

Even though Node developers now have access to Promises and the async/await syntax, the APIs still expect callbacks in order to maintain backwards compatibility.

Deno

Deno’s API has been designed to take advantage of modern JavaScript features. All the asynchronous methods return Promises. Deno also supports top level await, meaning you can use await in your main script without having to wrap it in an async function.

try {
  const data = await Deno.readFile('readme.txt');
  // Handle the data
} catch (e) {
  // Handle the error
}

The development team also made the decision to use web standards where possible, which means they’ve implemented browser APIs where it’s practical to do so. Deno provides a global window object, and APIs such as addEventListener and fetch. Having access to fetch is particularly nice, as with Node you’d have to polyfill this or use a third-party library.

The compatibility module

Deno provides a compatibility layer with the aim of allowing you to reuse existing Node packages. It’s not yet complete, but it does currently support loading CommonJS modules via require(), among other things.

Package Management

Package management is one area where Deno represents a radical departure from Node’s way of doing things. As it’s still early days for Deno, it remains to be seen if its approach will prove to be advantageous.

Node.js

As you might be aware, Node comes with its own package manager called npm, which is used to install and manage third-party packages. npm is mainly used with the online npm registry, where most of the available third-party packages are listed.

When you use npm to install a package into your project, a package.json file is used to specify the package name and acceptable version range. The package itself (plus any packages it depends on) are then downloaded into a node_modules folder inside your project.

Deno

Deno does away with the need for a package manager altogether. Instead, packages are linked to directly via a URL:

import { Response } from "https://deno.land/std@0.53.0/http/server.ts";

On the first run of your code, Deno fetches and compiles all the dependencies. They are then cached on the file system, separately from your project, so subsequent runs are much faster.

Similar to npm’s package-lock.json file, Deno allows you to specify a lock file that will be used to ensure that only dependencies that match the exact version you originally imported will be used

Third-party Packages

A language can thrive or die on the vibrancy of its ecosystem, as productivity relies on not having to reinvent the wheel! Here, it seems that Node currently has the edge.

Node.js

Node has a large and varied ecosystem of libraries and packages available. In the 11 years since its release, over a million packages have been registered on the npm registry. Of course, the quality can vary a lot, and many are no longer actively maintained, but it’s still a big plus for Node developers.

Deno

As we saw in the previous section, Deno is actively trying to avoid the need for a package manager or registry, by allowing scripts to import modules directly from any public URL. Of course, it’s hard to import packages if you don’t know what’s out there, so the Deno website maintains a list of compatible third-party modules. As of writing, there are 707 modules in the list.

Deno’s standard library

One way that Deno attempts to improve the developer experience is by providing a standard library of helpers and utilities for common tasks. All modules are audited by the core developers to ensure high-quality, dependable code. There are modules for things like processing command-line arguments, and colorizing terminal output — both things that are only available as third-party packages for Node.

Security

Perhaps one of Deno’s most touted improvements over Node is the permissions system. Let’s look at why.

Node.js

The Node runtime is very permissive, allowing code full access to the computer’s network and file system. There’s the potential for third-party code to wreak havoc on your system if unchecked.

Deno

Improving the security model is something that Ryan Dahl specifically set out to do when designing Deno. By default, all code is executed in a secure sandbox environment. This prevents code from having access to things like the file system, network, and environment variables unless access is specifically granted with a command-line argument.

# Allow script to make network requests
deno run --allow-net server.ts

Even better, when allowing read or write access to the file system, or access to the network, you can supply a whitelist. This means you could restrict a Deno program’s read/write access to the project’s data folder, for example, limiting any potential malicious damage.

Deno: Batteries Included

Before we wrap up, I just wanted to talk about one more thing. If you take a browse through the tools section of the manual, you’ll notice that Deno provides us with some nice “bonus features”! The following are built-in tools to make the developer experience that little bit nicer:

  • bundler: bundles up a specified script and its dependencies into a single file
  • debugger: allows debugging your Deno programs with Chrome Devtools, VS Code, and other tools (note: Node also comes with a debugger)
  • dependency inspector: running this on an ES module will list out all of the dependencies in a tree
  • documentation generator: parses JSDoc annotations in a given file and outputs documentation
  • formatter: auto-formats both JavaScript and TypeScript code
  • test runner: you can use this for testing your JS and TS code, in conjunction with the assertions module in the standard library
  • linter: a code linter (currently unstable) to help catch potential issues in your programs

Verdict

The purpose of this article is not to advocate for either Node or Deno, but rather to compare and contrast the two. You should now have an understanding of the similarities between the two runtimes and, perhaps more importantly, the differences.

Deno presents some particular advantages to developers, including a robust permissions system and first-class TypeScript support. The design decisions and additional built-in tooling are aimed at providing a productive environment and a good developer experience.

Node, on the other hand, has a massive and well-established ecosystem around it that’s been over a decade in the making. This, along with the plethora of documentation and tutorials out there, probably makes Node.js a safe bet for some time to come.

#deno #node #javascript #typescript

Brain  Crist

Brain Crist

1622259965

Node.js vs Deno: What You Need to Know

What is Deno?

Deno a pristine method to compose worker side JavaScript. It solves many of the problems as 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.

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

  • Security
  • Typescript
  • Browser API
  • ES Modules
  • Decentralized Packages
  • Honorable mention testing

#deno #node #nodejs #programming #javascript

Renato Silva

1597461180

Deno js vs Node or Deno vs Node

Deno js Bootcamp 2020, Deno web development, Deno tutorials - with Real Projects

#deno #node #javascript