hello-world.tsĬonst sayHello = function (greeter: string) from Date(2014, 1, 11), "yyyy-MM-dd") įor all the other NPM packages, if they are not compatible with esmodule imports, you can use a service like JSPM which will resolve the 3rd party modules and compile the CommonJS modules to work as ES Modules imports. Since TypeScript is just a superset of JavaScript, Deno can also run it. Although it comes with a default config file, it's possible to add your own deno run -c tsconfig.json. First Class TypeScriptĭeno is based on TypeScript, so it supports it out of the box without the need to install or configure tools, like adding a tsconfig.json configuration file in Node. It's possible to have multiple versions installed, using version managers.įor Node, version managers are also responsible for updating/installing new versions, e.g nvm. This will fetch the specified version (or latest if unspecified) and replace your current executable with it. linter ( deno lint) - currently unstableĪll these tools are standardized for Deno, so you have sure that they will have full support.īeing a single executable, Deno can update itself via: deno upgrade or deno upgrade -version.How Deno is different from Node Single Executable Fileĭeno ships as a single executable with no dependencies and comes with some built-in tools to make the developer experience easier: (At the time I’m writing this, the available Deno version is 1.4.0). How to install it # Mac/Linuxįor other installation methods, check the official documentation. It uses Tokio for its event loop, which is also written in Rust. Deno is a secure runtime for JavaScript and TypeScript based on Google’s V8 and its core is built in Rust (Node’s implementation is in C++). What is Deno?įirst of all, Deno is not a fork of Node - it’s a new implementation based on modern features of the JavaScript language, although the name is an anagram of Node. As he points out, at the time Node started being developed, JavaScript was a much different language, and it lacked some of the most modern features:Ĭonsidering many of the design flaws mentioned at the talk couldn’t be fixed without rewriting the core of Node and thus ending the support for legacy applications, Ryan decided to introduce Deno. In his talk, he details his regrets regarding some of the choices that were made in the development of Node. It brought server-side JavaScript to the mainstream and it was this JavaScript everywhere paradigm that allowed the development of web applications using a single programming language.įast forward to 2018, Ryan Dahl gave a talk in JSConf EU entitled Design Mistakes in Node - also known as “10 Things I Regret About Node.js”. Node is a server-side JavaScript environment based on Google’s V8 JavasScript engine, created by Ryan Dahl in 2009 and was heavily focused on event-driven HTTP servers. I hope we can help you having a clear though on what its best for you.Īt Imaginary Cloud, we have been using Node to build APIs, serve frontends, and to build microservices architectures, among others. In this post, we will take a look at Deno and how it compares to Node to help understand what they have in common, and what sets them apart in terms of: Now that Deno is released, it is time to find out if it can be a worthy competition for Node. I don't know if you're up with the news, but Deno is the new star on the Javascript Ecosystem - some people even say it's going to kill Node.
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