What is Deno JS and Its Important Features

Deno JS is a secure runtime for JavaScript and typescript that uses a V8 engine with inbuilt rust. It is developed by the Node developer Ryan Dahl. Deno JS offers a variety of features that focuses on productivity and a secure scripting environment for the developer. It is an effective replacement for utility scripts that are written with Python. It mainly focuses on Google runtime engine V8. It is built with Rust, Tokio, Typescript, and V8 google JavaScript runtime engine. They are designed to improve the capability of Node JS. Manyweb development company New York, keeping their eye on Deno JS for web development work. Let’s see some best features from Deno JS. Here are Some Deno JS Features for Web Development: It is a very secure platform and no filesystem and network access by run command. Easy installation with a single command It has a single executable Deno to run the complete project. When we run the program and the dependencies can be downloaded to the Deno caches. Dependencies can directly download using URLs. It provides support for javascript and typescript. Highly compatible with browsers. Deno Described Features  1.Security The most important feature of Deno JS is security. Deno executes the programmer code in the sandbox and runtime has no access to: The file system The network Execution of other scripts The environment variables The list of Security flags are provided below:–   ·-allow-write:Allow Write Access –alow-read:Allow Read Access –allow-net:Allow Network Access –alow-env:Allow Environment Access –alow-plugin:Allow loading External Plugins –allow-hrtime:Allow High-Resolution Time Measurement –allow-run:Allow Subprocesses to run -A:Allow all Permissions Let’s take a look at how the permission system works. (async () => {  const encoder = new TextEncoder();  const data = encoder.encode('Hello world ');    await Deno.writeFile('hello.txt', data);  await Deno.writeFile('hello2.txt', data); })(); The above script will create two files like hello.txt and hello2.txt with the hello world message. 2.Deno modules Deno modules are similar to browsers that load module URLs. The import statement on the server-side with the URL creates confusion for some users. import { assertEquals } from "https://deno.land/std/testing/asserts.ts"; Deno packages can easily be distributed without the registry as npm. The importation of code using URL makes it easy for package creators. When we look forwarding to start applications then Deno helps to download all imported modules and caches 3.Deno Browser Compatibility Deno focuses to build for browser compatibility. The use of the ES module doesn’t require any build tools like a web pack to make apps ready to use in the browser. The code can easily run in older browsers also. 4.Support Typescript It is easy to use typescript without the requirement of any config file. It has become easy to write programs in Javascript and execute them. 5.Standard Modules It has an extended set of libraries designed by the Deno team. These modules are hosted and distributed Urls like ES modules. Some of these standard libraries arefs,DateTime,HTTP, etc. It can also import modules from any location on the web like GitHub. 6.Utilities It provides built-in testing and built-in utilities. These utilities named dependency inspector and code formatter. It allows direct execution of web assemblies. It is also known for serving HTTP better than NodeJS. Conclusion Deploying web applications helps to serve resources to your app. It is the new runtime for JS as a solution for the issues of Node JS.