React Day Berlin

React Day Berlin 2023

JavaScript Should Come With Batteries: Deno is a next-generation JavaScript runtime that addresses the lack of built-in tooling in JavaScript. It provides a secure and simple way to develop applications with built-in testing, linting, formatting, and a language server for VS Code. Deno is compatible with Node.js and NPM, supports web standard APIs, and allows code portability between frontend and server. It also offers features like a built-in database, a key-value store, and transparent monetization with Deno Deploy.

Setting up JavaScript projects is no fun. Getting started involves installing and configuring node, tsc, prettier, eslint, a testing framework, a database driver, and more. Why is JavaScript not batteries included? In this talk we'll talk about how Deno fixes this, letting you focus on building stuff. We explore what benefits full tooling integration unlocks, and remember how fun it is to program if your tools help you, rather than requiring your babysitting.

Javascript Should Come With Batteries

Luca Casonato

Node Congress

Node Congress 2022

Deno aims to provide Node.js compatibility to make migration smoother and easier. While Deno can run apps and libraries offered for Node.js, not all are supported yet. There are trade-offs to consider, such as incompatible APIs and a less ideal developer experience. Deno is working on improving compatibility and the transition process. Efforts include porting Node.js modules, exploring a superset approach, and transparent package installation from npm.

Can Deno run apps and libraries authored for Node.js? What are the tradeoffs? How does it work? What’s next?

Node.js Compatibility in Deno

Bartek Iwanczuk

JS Nation

JSNation 2025

Today's discussion delves into testing in Deno, emphasizing its simplicity and built-in tooling. Deno offers a seamless testing experience for developers, allowing tests to be written in TypeScript without extensive setup. The platform supports BDD-style testing, provides various assertion types, advanced features like code coverage and snapshot testing, and allows for filtering tests based on keywords. Additionally, Deno facilitates component testing, dependency mocking, and migration of test suites from Jest to Deno with minimal changes.

Let’s dive into the world of testing with Deno’s built-in test runner! Come on in, the water’s lovely!We’ll kick things off by exploring the principles of effective testing, perfect for beginners dipping their toes in. Then, we’ll introduce Deno’s out-of-the-box test runner.With the Deno.test API, you’ll be jetting in no time. We’ll cover how to write assertions and see firsthand how they help ensure your code behaves as expected.To wrap things up, we’ll explore writing tests that will be familiar to those experienced with Jest and Vitest, using Deno and its standard library. You’ll gain practical knowledge on how simple Deno makes setting up your testing environment, structuring your test cases, and optimizing your testing workflow.Whether you’re a seasoned developer or new to Deno, this talk will provide the tools and knowledge you need to confidently navigate the waters of testing in your Deno projects and make a splash with your testing skills!

Testing the Waters With Deno

Jo Franchetti

Node Congress 2024

Today's Talk introduces Deno, a next-generation JavaScript runtime with native TypeScript support and improved server-side development features. Deno offers granular permissions for sensitive APIs and includes built-in tools like a test framework and linter. The Talk demonstrates how to use Deno with an existing Node.js project, showcasing compatibility and import features. It also discusses upcoming features like bringing Node modules to Deno and handling file extensions. Overall, Deno provides a seamless transition for Node developers and offers a range of powerful tools and features.

Deno is a next-generation TypeScript and JavaScript runtime from the original creator of Node.js. Deno is fast, secure by default, and provides a great developer experience, with TypeScript, JSX, testing, linting, and more all included out of the box. And best of all - you can bring many of your favorite to Node modules with you to Deno. In this talk, we'll cover the current state of backward compatibility with Node.js projects and modules in Deno. We'll demonstrate what works with zero configuration, and the available mechanisms in Deno that will let you bring the best of the Node ecosystem along for the ride.

The State of Node Compatibility in Deno

David Sherret

Kevin Whinnery

Node Congress 2023

This Talk introduces Deno, a custom JavaScript runtime similar to Node.js, and discusses the benefits of using a custom runtime. It explores the process of building a custom runtime with Deno in Rust, including the integration with Cargo and the ability to mix and match crates and APIs. The Talk also covers the implementation of the setTimeout function in both Run.js and Runtime.js, and provides examples of how to fix errors and implement additional functions. Overall, the Talk highlights the flexibility and possibilities of creating custom runtimes with Deno.

In this talk, we’ll create a small JavaScript runtime from scratch in Rust. We’ll leverage the same ecosystem of components that Deno uses to show that rolling a bespoke runtime fitting your needs is simple and fun in 2023

Roll you own JavaScript runtime

Today's Talk introduces Fresh, a full-stack web framework for Deno, and covers its features, such as static files, routes, and data-fetching. It also discusses middleware, error pages, and styling options. The Talk explains the Islands architecture used by Fresh to enable client interactivity. The demo showcases the use of hybrid routes and islands components, and resources for Fresh, Deno, Preact, TypeScript, and web standards are provided.

Fresh is a web framework based on Deno and Web standards built to run on the edge

Fresh: a new full stack web framework for Deno

Nick Taylor

The Talk explores the magic behind Node.js and delves into its components, including V8, libuv, and the C++ bridge. It discusses the workflow and execution process, the use of NodeMod, and the understanding of console functions. The Talk also covers Node.js functions and scheduling, the introduction of runtimes, and the collaboration between JavaScript runtimes. It concludes with insights on content production, the choice of Node.js, and the inspiration behind it.

Bun, Deno, and many other JavaScript runtimes have been hyped, but do you know why? Is it that easy to make a runtime from scratch? I've been researching the secret behind Node.js' power and why there are so many new JavaScript runtimes coming up. Breaking down each key component used on Node.js I've come to interesting conclusions that many people used to say whereas in practice it works a bit differently. In this talk, attendees will learn the concepts used to create a new JavaScript runtime. They're going to go through an example of how to make a JavaScript runtime by following what's behind the scenes on the Node.js project using C++. They'll learn the relationship between Chrome's V8 and Libuv and what makes one JavaScript runtime better than others. This talk will cover the following topics: - What's a JavaScript Engine - V8 - Why Node.js uses Libuv - How to create a JS Runtime from scratch

Bun, Deno, Node.js? Recreating a JavaScript runtime from Scratch - Understand magic behind  Node.js

Erick Wendel

The Talk discusses forced optimization with Node and Deno, with Deno aiming to pursue the same goals in a more expansive and modern way. Deno has built-in support for NPM and enforces security constraints. It also has a key-value database called Deno KV, which will be a core part of the Deno 2 API. Deno Deploy is a serverless Edge Functions platform powered by FoundationDB, optimized for fast reading and ideal for building eCommerce sites or application servers at the edge. Deno 2.0 is coming soon with more features under development.

Deno 2.0 is imminent and it's bringing some big changes to the JavaScript runtime. In this talk, we'll introduce the new features including import maps, package.json auto-discovery, and bare specifiers. We'll discuss how these improvements will help address issues like duplicate dependencies and disappearing dependencies. Additionally, we'll delve into the built-in support for deno: specifiers on the deno.land/x registry and its role in providing a recommended path for publishing. Come learn about how these updates will shape the future of the JavaScript ecosystem and improve backwards compatibility with Node applications.

Deno 2.0

Ryan Dahl

React Advanced

React Advanced 2022

The Talk discusses the concept of instant websites, aiming to minimize the time between user interaction and unblocking the user. It emphasizes prioritizing the loading of primary content and delaying the loading of secondary content to improve page loading times. Server-side rendering is highlighted as a faster alternative to client-side rendering, reducing network round trips and improving rendering times. The concept of island architecture is introduced, where only the JavaScript needed for interactive components is shipped to the client. The Fresh web framework is presented as a speed-focused framework for Deno, offering automatic CSS inlining and using Preact for client-side interactivity.

Any interaction faster than 100ms is imperceptible to users - what if all website interactions, including loading were 100ms or less? Let's explore strategies and how Fresh &amp; Deno can help.

Instant websites using Fresh and Deno on the Edge

JSNation 2022

Today's workshop is about building a full stack application using Deno and Deno deploy. We will create a blog with personalized blog entry pages and explore Deno's features such as TypeScript support and integrated tool chain. Deno deploy allows for easy deployment of Deno applications, and Fresh is a full stack web framework optimized for fast and scalable applications. The workshop covers topics such as setting up Deno, creating projects with Fresh, handling static pages and blog posts, testing, client interactivity, and deployment using Deno Deploy and GitHub Actions.

Learn how to build full stack apps with Deno and Deno Deploy. We'll build a simple app using the fresh (<a href="https://fresh.deno.dev/">fresh.deno.dev</a>) framework, and host it on Deno Deploy.

Getting Started with Deno and Deno Deploy

This Talk provides an introduction to Deno for Node.js developers, highlighting the differences in architecture and dependencies between the two runtimes. It discusses the Deno CLI and integrated toolchain, the Deno standard library and dependency management, as well as the Deno runtime and its core features. The Talk also covers Deno's permission system, its focus on web platform compatibility, and its support for TypeScript. Overall, it provides a comprehensive overview of Deno and its advantages over Node.js.

Deno and Node.js have a lot in common. They are both non-browser JavaScript runtimes built on the V8 engine. Deno and Node.js are also different in a lot of ways: TypeScript, CommonJS, package management, permission systems, tooling, native addons, browser compatibility. This talk will compare and contrast the two runtimes, focusing on what experienced Node.js developers need to know in order to succeed with Deno.

An Introduction to Deno for Node.js Developers

Colin Ihrig

TS Congress

TypeScript Congress 2022

Deno is a modern runtime for TypeScript and JavaScript that runs out of the box and is secure by default. The Talk covers building a greeting message library with Deno, compiling Deno libraries for Node consumers, setting up the editor and writing code, writing tests and running them with dnotest, code formatting, linting, and publishing, publishing to NPM and running tests, and building and publishing the NPM package. The speaker emphasizes the ease of use and integration of Deno's tooling system.

This talk will walk you through writing a module in TypeScript that can be consumed by users of Deno, Node, and browsers. I will walk through how to set up formatting, linting, and testing in Deno, and then how to publish your module to deno.land/x and npm. I will also start out with a quick introduction on what Deno is.

Writing universal modules for Deno, Node, and the browser

DevOps.js

DevOps.js Conf 2022

The Talk discusses using Dino and TypeScript to simplify writing and managing Kubernetes YAML configurations. It explores the challenges of working with large YAML files and introduces a unique solution. The Talk also highlights the features and benefits of Deno, such as its secure runtime and powerful typing capabilities. It demonstrates how Deno can be used to create and modify Kubernetes objects, and emphasizes the advantages of using a general-purpose language for configuration. The Talk concludes by discussing the potential applications of this approach beyond Kubernetes deployments.

As we all know, dealing with Kubernetes YAML is not very intuitive (especially for those just getting starting) and the more resources and dependencies are added the messier and more complex the process becomes. In this talk, we'll explore how we can use Typescript and Deno to bring typing, composition, code-reuse, and testing as an alternative to YAML - that doesn't include these capabilities, all while still remaining declarative and easy to use. <a href="https://www.froala.com/wysiwyg-editor?pb=1"> </a>

Experimenting with Deno for Easier Kubernetes Deployments

Yshay Yaacobi

Luca, a software engineer at Dinoland Inc., works on the open source Dino CLI project and the cloud compute offering called Dino deploy. They contribute to web standards work for Dino. The Workshop covers writing a utility library that works in Deno, Node, and the browser, utilizing Deno's tooling and enabling publishing to npm. It also includes topics like setting up Deno in VS Code and PowerShell, creating a JSON parse stream, testing, formatting, setting up CI pipelines, making code work in Node, transpiling, and publishing to npm. The Workshop explores automation with CI/CD and Git hooks, using Denobundle for browser compatibility, and importing from CDNs.

This workshop will walk you through writing a module in TypeScript that can be consumed users of Deno, Node and the browsers. I will explain how to set up formatting, linting and testing in Deno, and then how to publish your module to deno.land/x and npm. We’ll start out with a quick introduction to what Deno is. <a href="https://www.froala.com/wysiwyg-editor?pb=1"> </a>

Writing Universal Modules for Deno, Node and the Browser

Today's Talk explores the future of JavaScript runtimes, their evolution, and impact on software development. It discusses the historical trends of JavaScript, the adoption of new tools and libraries, and the convergence of Node and Deno. The emergence of isolate clouds and their potential to replace traditional VMs and containers is also highlighted. Additionally, the talk touches on the possibilities of JavaScript in exotic use cases, its impact on machine learning, and the potential for TypeScript to become the de facto language for JavaScript development.

JavaScript was born in the browser, Node brought it to the server embracing unix primitives and async I/O and lately Cloudflare Workers &amp; Deno Deploy have brought it to the edge. Let’s take a look at where JavaScript runtimes are heading and how it will shape the software we write. <a href="https://www.froala.com/wysiwyg-editor?pb=1"> </a>

The Future of JavaScript Runtimes

Aaron O'Mullan

React Finland

React Finland 2021

A demo on Aleph.js about good development experience and deno runtime. <a href="https://www.froala.com/wysiwyg-editor?pb=1"> </a>

Aleph.js - Build your React app in Deno

Je Xia

JSNation Live

JSNation Live 2021

The Workshop introduces Beano and Hyper, a JavaScript runtime and a Rust library known for its fast HTTP implementation. The benefits of using Rust and Hyper over the standard TypeScript implementation of HTTP are discussed. Load tests show that Hyper is about 35% faster. The process of building a web framework called Hyperbole is explained, along with the implementation of request handling logic and middleware. The use of Deno for libraries and production is explored, and the importance of load testing and optimization is emphasized.

Deno 1.9 introduced a new web server API that takes advantage of Hyper, a fast and correct HTTP implementation for Rust. Using this API instead of the std/http implementation increases performance and provides support for HTTP2. In this workshop, learn how to create a web server utilizing Hyper under the hood and boost the performance for your web apps. <a href="https://www.froala.com/wysiwyg-editor?pb=1"> </a>

#deno