Blog

Deno 2.2 adds built-in OpenTelemetry, a new linter plugin API, node:sqlite, and major improvements to deno check, deno lsp, and deno task.

We had a busy 2024 with the launch of Deno 2 and JSR, and dozens of features to simplify programming. Here are the biggest updates in 2024 and what's on the horizon.

WinterCG, the Web Interoperable Runtimes Community Group is moving to Ecma as TC55 to be able to publish standards.

Deno 2.1 introduces first-class Wasm imports, built-in tracing with OpenTelemetry, faster `deno compile`, and improved package management.

Deno compile is a flexible tool that turns a JavaScript or TypeScript program into a portable, streamlined binary for any OS. Here's how it works.

Deno’s new package manager, added in v2.0, is fast, flexible, and supports Node and package.json. Here’s how it works.

Our next major version of Deno combines the simplicity, security, and performance of Deno 1 with full Node and npm backwards compatibility, and much more.

We've merged in many fixes and improvements to the Deno 2 release candidate. Here's what's new.

Rusty V8, a library that provides high-quality, zero-overhead Rust bindings to V8, is finally stable. Here's how to use it.

This release candidate, a near-final look at Deno 2, includes the addition of Node's process global, better dependency management, and various API stabilizations, and more.

The Web Cache API offers sub-millisecond read latency, multi-Gbps write throughput, and unbounded storage. Here’s how you can use it.

Our last 1.x release before Deno 2 comes with a ton of features, ranging from a simpler, improved CLI, to multi-threaded web servers, improvements to Node.js/npm compatibility, and more.

You can now exercise greater control over your Deno Deploy spend with our new spend limits. Here’s how they work.

Deno 1.45 introduces workspaces and monorepo support, improved Node.js compatibility, updates to `deno install`, the new `deno init --lib` command, deprecation of `deno vendor`, Standard Library stabilization, upgrades to V8 12.7 and TypeScript 5.5.2, and more.

This new feature allows Subhosting users to configure their KV databases to back up data to their own S3-compatible object storage via APIs.

This new update simplifies programmatically managing custom domains, wildcard domains, subdomains for different deployments, and more.

The Deno Standard Library is going to reach 1.0.0 shortly. We hope you try RC versions of the packages and give us feedback!

Deno 1.44 adds support for private npm registries, gRPC connections, improved Node.js compat with initial Next.js support, and significant performance improvements.

The Deno Standard Library has moved to JSR, supporting SemVer ranges in imports and compatibility with Node.js, Cloudflare Workers, and more.

Deno 1.43 enhances productivity with a faster language server, improved npm compatibility, a new `deno serve` subcommand, URL.parse() API, and announcements regarding Deno 2.

Introducing a more simplified project creation flow in Deno Deploy, including seamless CI/CD setup, a more transparent build and deployment step, and more.

Deno 1.42 revolutionizes dependency management with the seamless integration of JSR, enhancing Node/npm compatibility and introducing significant performance improvements.

Deno Deploy’s command line interface, deployctl, is the simplest way to deploy your projects to the cloud. Here’s how to do it.

The JavaScript Registry (JSR) is a TypeScript-first, ESM-only module registry designed for the entire JavaScript ecosystem. Use JSR modules from Deno and npm-based projects. JSR is free and open source. Available today in public beta.

We've roughly halved the size of `deno compile` binaries, added official Linux ARM64 builds, continued to land Node.js compatibility improvements, and more.

We revamped Deno Deploy’s onboarding to show you how easy it is to use Deno’s cloud primitives in your projects.

2023 marked a significant step towards our vision of radically simplifying web development. Here are the biggest updates and what’s coming up next.

Deno 1.40 introduces the Temporal API, TC39 decorators, and a range of deprecations and stabilizations, along with improvements in Node.js compatibility, LSP, diagnostics, and handling of unstable features, paving the way for a seamless upgrade to Deno 2.

We've re-added WebGPU, added new deno coverage reporters, made substantial Node.js compatibility improvements, and more.

Access our zero config distributed database, Deno KV, in your Node projects with our new npm package.

Detecting changes in Deno KV with `kv.watch` makes it easier to build real-time applications like newsfeeds, analytics, multi-user collaboration tools, and more.

Discover new improvements in Fresh 1.6 that simplify your project and make it speedier.

`Deno.cron` allows you to easily create scheduled jobs and is available on Deno Deploy. Here's how it works.

Subhosting is a new way to leverage Deno Deploy's fast, scalable multi-tenant v8 isolate cloud to run your users code securely.

Deno KV is now even more flexible and powerful with self-hosted options, replicas, and S3 and GCS continuous backup support.

Deno 1.38 ships with HTML doc output, hot module replacement, improved Node.js compatibility by allowing you to use your own `node_modules` folder, and more.

Discover new improvements in Fresh 1.5 that makes your site quicker to load and comes with several improvements to make authoring complex projects easier.

Introducing Deno Queues - zero config, scalable messaging with a guaranteed at-least-once delivery. This new primitive builds on the foundation set by Deno KV, and is available today in the Deno JavaScript runtime and Deno Deploy.

Deno 1.37 ships with a Jupyter notebook integration and improved VSCode and LSP features.

Deno Deploy becomes the first isolate serverless platform to natively support more than two million modules on npm.

Deno KV, the easiest way to add a strongly consistent database to your app, is now in open beta.

Discover new improvements in Fresh 1.4 that makes your site quicker to load and comes with several improvements to make authoring complex projects easier.

Deno 1.36 introduces new runtime security options plus expanded testing and benchmarking APIs.

Explore the key improvements in Fresh 1.3: streamlined route components, enhanced error handling, updated linting rules, and multi-island exports. This release also supports the stable Deno.serve API, making Deno projects more efficient and manageable.

Deno.serve() is stable, support for key npm packages, and more.

Learn what new features the 1.2 release brings and about the future of Fresh.

You can now use Node.js built-in modules like `node:http` on Deno Deploy, allowing you to run existing Node.js apps at the edge.

This update augments compatibility with npm and Node.js, incorporates glob support, and enhances TLS certificates with IP addresses. It also brings forth improvements to the configuration, language server, APIs, and updates to V8 and TypeScript.

Post-mortem report for the Deploy and Subhosting outage on May 23rd, 2023.

Introducing Deno KV, a global key-value database for effortless stateful app development on Deno Deploy, offering seamless integration, strong consistency, and versatility.

Deno 1.33 is a step towards our next major release, with improved LSP support, enhanced Node.js compatibility, and more.

Deno 1.32 brings major improvements to deno compile, Node.js compatibility, Web APIs, and more.

Deno 1.31 adds support for package.json, stabilizes Node-API, Deno.Command API, adds `node:v8` module, and more.

Deno 1.30 supports built-in Node modules, deno.json is an import map, deno fmt can format without semicolons, and more...

2022 was a big year for Deno. Here are the biggest updates from the past year and what's coming up next.

Deno 1.29 ships with many npm compatibility improvements, lots of quality of life improvements and TypeScript 4.9

How Deno's secure-by-default and opt-in permissions system gives you more confidence in running untrusted npm modules.

Deno 1.28 ships with stabilized npm modules, auto-discovered lock file, a new subprocess API, and more

Deno 1.27 ships with major improvements for IDEs, better support for npm packages, navigator.language Web API and more.

Deno 1.26 adds Cache Web API; improves permission system, experimental npm support, Node.js compatibility; ships with TypeScript 4.8, and more.

This release makes Fresh even more powerful with automatic JSX, plugins, DevTools integration and more.

Deno 1.25 adds the `deno init` subcommand, experimental support for importing npm packages, a new faster web server, and performance improvements to the FFI.

Learnings from our recent survey and feedback from across our community. We'll discuss how we're addressing this feedback and the features to expect from Deno in the coming months.

Deno 1.24 improves performance of transpiling and type-checking, adds unhandledrejection and beforeunload events, adds import.meta.resolve() API, and more

Post-mortem report for the Deploy and Subhosting outage on July 18th

Post-mortem report for the outage on July 13th and 14th 2022

Fresh is a new full stack web framework for Deno. By default, Fresh web pages send zero JavaScript to the client.

Series A led by Sequoia Capital

Deno 1.23 changes default type-checking behavior, ships with TypeScript 4.7, updates "deno task", and more

Post-mortem report for the 1 hour service outage on March 30th 2022

Introducing a dashboard re-design, more regions, and billing.

Deno 1.22 changes default type-checking behavior, removes Deno.emit() API, adds Response.json() API, adds Deno namespace to workers by default, and more

Deno partners with Cloudflare and others on runtime interoperability through web standards.

Deno 1.21 has improvements to testing facilities, the REPL, adds deno check, improves the language server, adds a new subprocess API, and more

Deno 1.20 increases performance, auto-compresses http responses, adds 'deno task', adds 'deno bench', allows import maps in deno.json, and more

Deno 1.19 improves our web streams integration, introduces a `deno vendor` subcommand, and adds many other new features.

Deno Deploy runs Deno programs at the edge, now with support for static files.

Retrospect of what happened in 2021 and what's coming in 2022

Deno 1.18 marks the finalization of the Web Cryptography API, and adds, stabilizes, and improves many features.

Post-mortem report for the 40 minute service outage on on 4th January 2022.

Deno 1.17 adds JSON imports, import completions in the REPL, and much more.

Deno has joined the JavaScript standards committee to improve the language for everyone.

Deno Deploy provides web standard streaming infrastructure to easily whip up real-time applications.

Deno 1.16 adds support for new JSX transforms, reading files from disk using fetch, and much more.

Deno Deploy is a multi-tenant distributed JavaScript VM running in 28 data centers across the world.

Deno 1.15 improves Web Crypto support, adds deno uninstall subcommand, stabilizes URLPattern and more.

Post-mortem report for the 35 minute service outage on on September 23, 2021.

Deno 1.14 improves Web Crypto support, adds customization options to deno fmt and deno lint, introduces URLPattern, and more.

Deno Deploy is a multi-tenant distributed JavaScript VM running in 25 data centers across the world.

Web compatibility data for Deno is now available on MDN.

Deno 1.13 stabilizes the native HTTP server, and introduces FFI, a streaming WebSocket API, the new self.structuredClone() function and more.

Post-mortem report for the 6 minute service outage on July 27, 2021.

The Deno 1.12 release adds server side WebSockets, support for WASM threads, new web crypto APIs and more.

Deno Deploy is a multi-tenant distributed JavaScript VM running in 25 data centers across the world.

The Deno 1.11 release adds new web APIs, resolves long standing issues, and improves editor experience.

Deno 1.10 improves the built-in test runner, adds support for Web Storage API, structured clone, and more.

Deno 1.9 adds a new native HTTP/2 web server, a vastly improved op infrastructure, import completions in the LSP, an interactive permission prompt, blob url support.

We have raised money to enable the millions of web programmers out there to maximally leverage their craft.

Post-mortem report for the 98 minute service outage on March 2, 2021.

Deno 1.8 adds experimental support for the WebGPU API, adds support for importing private modules, stabilizes import maps, revamps coverage tooling, adds ICU to provide internationalization out of the box, and a whole lot more.

Deno 1.7, one of our largest releases to date, adds cross compilation and 60% smaller binaries for deno compile, a DNS resolver API, support for data URLs in import statements and web workers, and much more.

Retrospect of what happened in Deno in 2020

Deno 1.6 adds the ability to build your Deno projects into fully standalone, self-contained executables with `deno compile`. The release also introduces a built-in LSP for editor integrations, and experimental Apple Silicon support.

Deno 1.5 improves `deno bundle` with support for tree shaking and a 15x speed improvement. This release also adds the `alert`, `confirm`, and `prompt` APIs and enhances the REPL.

Deno 1.4 adds support for the web standard WebSocket API, deno run --watch, and integrated test coverage. This is the largest feature release yet.

Design considerations and changes for the new code hosting service.

Dynamic languages are useful tools. Scripting allows users to rapidly and succinctly tie together complex systems and express ideas without worrying about details like memory management or build systems.