Training Example: Deno – Review the Data, Give Your Score & Compare to the Real AI Evaluation

[H1] Uncomplicate JavaScript
Deno is the open-source JavaScript runtime for the modern web.DocsGitHub
[IMG: An illustration in the style of lo-fi anime showing a cute dinosaur coding on a laptop in a cozy room. The laptop has a Deno sticker on the lid, and there]
[H2] Install Deno 2.8.0
Release notesMacOS/Linux(Currently selected)Windowscurl -fsSL https://deno.land/install.sh | shCopy command
[H2] Deno is the open-source JavaScript runtime for the modern web.
Built on web standards with zero-config TypeScript, unmatched security, and a complete built-in toolchain.Rating100k+Stars on GitHubCommunity400k+Active Deno usersEcosystem2M+Community modules
[IMG: Slack]
[IMG: Netlify]
[IMG: GitHub]
[IMG: Supabase]
[IMG: Salesforce]
[IMG: Spotify]
[IMG: Stripe]
[IMG: Bank of America]
[IMG: Tencent]
[H3] Enterprise-grade JavaScript
Now offering enterprise support for the Deno runtimeLearn more
[H2] All your favorite tools, built-in and ready to go
Deno natively supports TypeScript, JSX, and modern ECMAScript features with zero configuration.account.tstype User = { name: string; balance: number };
function getBalance(user: User): string {
return `Balance: $${user.balance.toFixed(2)}`;
}

[H1] Now Generally AvailableDeno Deploy
One simple platform for all your JavaScript and TypeScript applications.Try Deno DeployDeno Deploy docs
[H2] — What’s new —
[H3] Made for all JavaScript
(Yes, all)We've been hard at work making the new Deno Deploy the best deployment platform for anything and everything that runs on JavaScript or TypeScript.Fresh logoVue logoHono logoNext logoSolid Start logoNuxt logoSvelteKit logoDocusaurus logoReact logoAstro logoSolid logoRemix logoVite logoExpress logoDeno logoNode logo
[H3] Has everything your project needs
Whatever your framework, package manager, or build tooling, Deno Deploy has you covered.ISRSSGSSRPPRFFIsubprocessesNode addons
[H3] A data layer built for simplicity
Seamlessly integrate with your production database, and get an isolated clone with every PR!Or, provision a new connected database, like our simple managed KV store, Prisma, and more, right from the dashboard.+ Provision databaseLink database
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Postgres
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Prisma
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Deno KVComing Soon
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MySQLSuccess! Branch database clone is active and ready
[H3] Powerful developer tooling
Whether building locally or debugging in production, Deno Deploy provides a world-class developer experience
[H4] First-class telemetry with external sync
Deno Deploy is built on standard OpenTelemetry protocols, giving you auto-instrumented logs, traces, and metrics out of the box.Explore through the Deno Deploy dashboard, or easily forward to your own observability platform.
[IMG: Deno Deploy telemetry dashboard, showing a list of traces with their duration, status, and other metadata. One trace is selected, showing a detailed view of the trace, including duration, method, route, and more.]
$ deno task --tunnel devYou are connected tohttps://app--local.org.deno.netSend telemetry, use prod env vars,and more with tunneling!
[H4] Level-up local development with tunnels
Build, deploy, manage, and observe your apps locally from the command line.Tunnels automatically send telemetry to your Deno Deploy dashboard, and pull down production env vars to use locally!
[H4] Build fast with playgrounds
Instantly spin up new projects right in the browser, complete with a live preview URL!Add files, configure builds, and even set unique .env variables for each playgroundNew!
[IMG: Creating a new Deno Deploy app from GitHub; select your user, repo, and permissions.]
[H4] Schedule tasks with cron
Don't just fire-and-forget; specify cron jobs in code, and monitor them right from your dashboard.Cron docs
[H2] — What’s improved —
[H3] A fast and flexible platform
Whether you need effortless serverless, simple static solutions, or something in between, Deno Deploy's got your use case covered.
[H4] Automatic deploys, builds, and previews
Enjoy automatic GitHub deployments, custom builds, preview domains for each pull request, custom domains, metrics, collaboration tools, and much more.
[IMG: Creating a new Deno Deploy app from GitHub; select your user, repo, and permissions.]
[H4] Collaboration, simplified
Team members can customize timelines, environments, builds, and more. Plus, Deno Deploy lets you share .env secrets without revealing their values, or even use them for local development.
[H3] Built for builders
[H4] Faster cold starts
Deno Deploy runs your code in lightweight V8 isolates, offering faster cold start times than lambda functions or virtual machines.
[H4] Elastic scalability
Start with a generous free tier, and gracefully scale up or down as needed, automatically.
[H4] Runs on Deno
Deno Deploy runs on Deno under the hood, so you get better speed and security, with full Node and npm compatibility. It's like a free upgrade.Deno Deploy
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Your AWS/GCP
[IMG: Deno Deploy egg logo]
deployd
[IMG: Deno Deploy egg logo]
deploydManaged app config
[H3] Managed, or self-hosted
Deno Deploy is built to grow with you, and run anywhere. Use our infrastructure, or use the all-new deployd to self-host on your own.Interested in self-hosting Deno Deploy?Contact us
[H2] Still trusted by the best
[IMG: ISO/IEC 27001:2022 certified]
[IMG: SOC 2 Type II texted & attested by Prescient Assurance]
10B+Requests processed monthly“We chose Deno to power Netlify Edge Functions because it's optimized for performance and doesn’t force proprietary APIs onto our users.”Mathias Biilmann - CEO Netlify
[H2] Deno Deploy success stories
[H3] How Netlify used Deno Subhosting to build a successful edge functions product
Read the case study›
[H3] How Slack used Deno to save months of engineering effort in launching their new platform
Read the case study›
[H3] How Brazil's top ecommerce platform used Deno Subhosting to drive 5x faster page load speeds
Read the case study›
[IMG: Deno Deploy logo]
[H2] Ready to try the new Deno Deploy?
Get started nowDeno Deploy docs|Pricing

[H1] Blog
Product UpdateFreshHow ToDeno DeployDeno KVAnnouncementsEngineeringJavaScript#FreeJavaScriptDeno in ProductionJSRDocsAstroPartnershipsPerformanceSubhostingMay 22, 2026Product Update
[H3] Deno 2.8
`import defer`, six new subcommands (`deno transpile`, `deno pack`, `deno bump-version`, `deno ci`, `deno why`, `deno audit fix`), network debugging in Chrome DevTools, framework-aware `deno compile`, and 3.66x faster cold npm installs.May 21, 2026Product Update
[H3] Claw Patrol: an open-source security firewall for agents
Why we needed an agent firewall that speaks more than HTTP.April 24, 2026Product Update Fresh
[H3] Fresh 2.3: Zero JS by default, View Transitions, and Temporal support
Fresh 2.3 ships true zero-JS pages, View Transitions, CSP nonce support, IP filtering, and Temporal API support in islands.February 25, 2026Product Update
[H3] Deno 2.7: Temporal API, Windows ARM, and npm overrides
Deno 2.7 stabilizes the Temporal API, adds Windows on ARM builds, npm overrides in package.json, brotli compression streams, self-extracting compiled binaries, deno create, and dozens of Node.js compatibility improvements.February 23, 2026How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 6
Add structured logging, distributed traces, and game analytics to your Deno game and learn how to use Deno Deploy's built-in logs, traces, and metrics dashboards.February 9, 2026How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 5
Capture player identities, add a customization modal, and persist those preferences via Oak + PostgreSQL.February 3, 2026Product Update Deno Deploy Deno KV
[H3] Deno Deploy is Generally Available
Deno Deploy is now generally available, plus some highlights of new features and tools.February 3, 2026Product Update
[H3] Introducing Deno Sandbox
Instant Linux microVMs with defense-in-depth security for running untrusted code.January 26, 2026How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 4
Building a leaderboard with database integration for our example browser-based game.December 22, 2025How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 3
Adding obstacles, collision detection and game mechanics to our example browser-based game.December 15, 2025How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 2
This series of posts will guide you through building a simple game using Deno. This post sets up the game loop, user controls and basic game physics.December 11, 2025Deno Deploy Announcements
[H3] React / Next.js Denial-of-Service Vulnerability: Deno Deploy users protected
A high severity Denial-of-Service (DoS) vulnerability has been found in React Server Components and Next.js. Deno has implemented mitigations in Deno Deploy. Immediate upgrades are required for other users.December 10, 2025Product Update
[H3] Deno 2.6: dx is the new npx
This release includes `dx` for running package binaries, more granular permissions, source phase imports, faster type checking with `tsgo`, native source maps, `deno audit`, and much more.December 8, 2025How To Deno Deploy
[H3] Build a dinosaur runner game with Deno, pt. 1
This series of posts will guide you through building a simple game using Deno. Each post corresponds to a stage in the development process, gradually introducing new features and concepts.December 3, 2025Deno Deploy Announcements
[H3] React Server Functions / Next.js Vulnerability: Deno Deploy users protected
A critical Remote Code Execution (RCE) vulnerability has been found in React Server Functions and Next.js. Deno has implemented mitigations in Deno Deploy. Immediate upgrades are required for other users.October 21, 2025Product Update Deno Deploy Deno KV
[H3] My highlights from the new Deno Deploy
Highlights from the new version of Deno Deploy.October 16, 2025Engineering
[H3] Deno's Other Open Source Projects
Here’s a roundup of some of our popular open source libraries and how we use them in Deno.September 30, 2025JavaScript
[H3] How Deno protects against npm exploits
Recent supply chain attacks on npm is a reminder that Node and npm grants unfettered access to your systems. Here's how Deno, with an opt-in security model, protects against these vulnerabilities.
September 18, 2025#FreeJavaScript
[H3] Help Us Raise $200k to Free JavaScript from Oracle
Our legal battle over Oracle's claim on the word "JavaScript" is entering the discovery phase. Here's how you can help.September 10, 2025Product Update
[H3] Deno 2.5: Permissions in the config file
Simpler permission management with permission sets, new Deno.test APIs for setting up and tearing down test cases, specifying custom headers in WebSocket connections, runtime APIs in deno bundle, and more.September 2, 2025Product Update Fresh
[H3] Fresh 2.0 Graduates to Beta, Adds Vite Support
Fresh 2.0 beta introduces optional Vite integration - with hot reloading, faster boot times, seamless React aliasing, and the full Vite plugin ecosystemJuly 2, 2025Product Update
[H3] Deno 2.4: deno bundle is back
Deno bundle is back, alongside the addition of bytes and text imports, stabilized built-in OpenTelemetry, a new --preload flag, simplified dependency management with deno update, and more.June 27, 2025#FreeJavaScript
[H3] JavaScript™ Trademark Update
The Trademark Trial and Appeal Board has dismissed our fraud claim against Oracle. We disagree with this decision.June 26, 2025Engineering
[H3] What's coming to JavaScript
Here are proposals that were advanced at the last TC39 meeting and what that means for the future of JavaScript.May 22, 2025JavaScript
[H3] A brief history of JavaScript
In 30 years, JavaScript went from being a little scripting language to one of the world's most popular. Here are key moments to show how it has evolved and where it is headed.May 20, 2025Deno Deploy
[H3] Reports of Deno's Demise Have Been Greatly Exaggerated
Addressing recent Deno criticisms and sharing our vision for the futureMay 15, 2025Product Update Fresh
[H3] An Update on Fresh
Fresh 2.0 is very much still active. Here’s an update and how to try out the alpha.May 2, 2025Deno in Production
[H3] How Plaid migrated 100 services to a new database platform 5x faster with Deno
Learn how Plaid used Deno to minimize downtime and improve cutover speed during a critical infrastructure migration.May 1, 2025Product Update
[H3] Deno 2.3: Improved deno compile, local npm packages, and more
Deno 2.3 adds new features for deno compile and deno fmt, support for using local npm packages, several performance improvements, and more. Here are the biggest highlights.April 25, 2025JSR
[H3] Add JSR packages with pnpm and Yarn
You can now access JSR packages via pnpm and Yarn. Here's how.
April 9, 2025Engineering How To
[H3] Zero-config Debugging with Deno and OpenTelemetry
Debugging requires implementation to get the right data for you to resolve issues quickly. Here's how you can use Deno to capture necessary telemetry data without any additional work.April 1, 2025How To Engineering
[H3] Exploring Art with TypeScript, Jupyter, Polars, and Observable Plot
With Deno's Jupyter support, you can explore, interact, and create interactive charts with TypeScript and HTML. Here's a tutorial featuring data of over 130,000 famous artworks.March 30, 2025#FreeJavaScript
[H3] Deno v Oracle Update 3: Fighting the JavaScript Trademark
Oracle has filed a partial motion to dismiss our fraud claim. We’re now waiting on the USPTO to weigh in.March 18, 2025How To
[H3] Build a custom RAG AI agent in TypeScript and Jupyter
AI and LLMs are certainly useful assistive tools. But what if we need to train LLMs on confidential documents and materials? Here's how you can build your own custom RAG AI agent.
March 13, 2025Engineering How To
[H3] How to get deep traces in your Node.js backend with OTel and Deno
Adding meaningful tracing to a Node backend requires additional instrumentation and configuration. Here’s another approach that requires zero additional code.March 7, 2025Announcements
[H3] toranoana.deno #20 登録受付中(2025年3月14日)
Deno は東京で行われるミートアップ toranoana.deno #20 に開催協力します。以下、主な詳細とスケジュールの概要です。
March 6, 2025Engineering
[H3] Node just added TypeScript support. What does that mean for Deno?
Node's experimental TypeScript support will be stabilized in 23.6. Here's what Node's TypeScript integration looks like and how it compares to Deno.February 27, 2025How To
[H3] The Dino ?, the Llama ?, and the Whale ?
Did you know you can run a large language model with Deno and Jupyter Notebooks? Here's how.
February 25, 2025How To Announcements
[H3] Publish a lint rule, get a prize
Deno's new lint plugin system means you can extend the deno lint functionality with your own rules. We're giving prizes for anyone who publishes a lint rule this week. Here's how to participate.February 19, 2025Product Update
[H3] Deno 2.2: OpenTelemetry, Lint Plugins, node:sqlite
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.February 13, 2025How To
[H3] If you're not using npm specifiers, you're doing it wrong
One common way to import npm packages is with transpile services like esm.sh or unpkg.com, which
converts npm modules to esm and hosts them on the web. However, since Deno 2, which supports npm natively, we recommend using npm specifiers. Here's why.
February 7, 2025Docs
[H3] How Deno's documentation is evolving
Documentation is a critical part of developer experience. Here's how we're improving our documentation and what's to come.
February 4, 2025#FreeJavaScript
[H3] Oracle justified its JavaScript trademark with Node.js—now it wants that ignored
Oracle filed a motion to dismiss in response to Deno’s petition to cancel its “JavaScript” trademark. But instead of addressing the real issue—that JavaScript is an open standard with multiple independent implementations—Oracle is trying to stall the process and sidestep accountability.February 3, 2025JSR
[H3] Introducing the JSR open governance board
JSR, a modern open source JavaScript registry, is meant for the greater JavaScript and TypeScript community. We're thrilled to announce its own independent governing body.January 28, 2025Engineering
[H3] Intro to Wasm in Deno
Web Assembly, or Wasm, is a great way to increase performance in your web application. Here is an introductory guide to what it is and how you can use it.January 24, 2025JSR Announcements
[H3] Announcing OpenAI on JSR
OpenAI, leading development platform for building generative AI products and experiences, now has a JavaScript and TypeScript SDK on JSR.January 21, 2025Product Update
[H3] Deno in 2024
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.January 10, 2025Product Update
[H3] Goodbye WinterCG, welcome WinterTC
WinterCG, the Web Interoperable Runtimes Community Group is moving to Ecma as TC55 to be able to publish standards.
December 5, 2024How To
[H3] Build a SolidJS app with Deno
Learn how to build a simple SolidJS application with Deno.December 2, 2024How To Deno Deploy
[H3] Run your Next.js SSR app on Deno Deploy
Here's how to get your Next.js SSR project up and running on Deno Deploy.November 27, 2024Announcements
[H3] Solve Advent of Code 2024 with Deno and Win Prizes!
We're giving out exclusive prizes for using Deno during the Advent of Code 2024. Here's what you can win.November 25, 2024#FreeJavaScript
[H3] Deno v. Oracle: Canceling the JavaScript Trademark
Oracle is holding the JavaScript trademark hostage, and we’re pursuing legal means to #FreeJavaScript. Here’s a brief update.November 21, 2024Product Update
[H3] Deno 2.1: Wasm Imports and other enhancements
Deno 2.1 introduces first-class Wasm imports, built-in tracing with OpenTelemetry, faster `deno compile`, and improved package management.November 19, 2024How To
[H3] Build a Typesafe API with tRPC and Deno
Learn how to build a typesafe API with tRPC and Deno.November 14, 2024How To Product Update
[H3] Self-contained Executable Programs with Deno Compile
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.November 13, 2024How To
[H3] Build a Database App with Drizzle ORM and Deno
Using an object-relational mapping (ORM) database can make working with persistent data simpler. Here's how to use a popular ORM, Drizzle, with Deno.November 8, 2024Product Update
[H3] Introducing your new JavaScript package manager: Deno
Deno’s new package manager, added in v2.0, is fast, flexible, and supports Node and package.json. Here’s how it works.November 4, 2024JSR Announcements
[H3] Announcing Growthbook on JSR
Growthbook's JavaScript SDK, which enables easy AB testing and personalization, is now available on JSR.October 29, 2024How To Astro
[H3] Build an Astro site with Deno
Learn how to build a server-rendered website with Astro and Deno.October 16, 2024How To
[H3] How to convert CommonJS to ESM
Here’s a thorough guide that covers everything you need to know to migrate your CommonJS project to ESM.October 9, 2024Product Update
[H3] Announcing Deno 2
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.October 4, 2024Product Update
[H3] The Final Touches: What’s New In v2.0.0-rc.10
We've merged in many fixes and improvements to the Deno 2 release candidate. Here's what's new.September 24, 2024Product Update
[H3] Announcing Stable V8 Bindings for Rust
Rusty V8, a library that provides high-quality, zero-overhead Rust bindings to V8, is finally stable. Here's how to use it.September 19, 2024Product Update
[H3] Deno 2.0 Release Candidate
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.September 10, 2024Partnerships How To
[H3] Secure, efficient private npm registries with Cloudsmith and Deno
Deno can use private npm registries with Cloudsmith, which offers additional security features, analytics into module usage, and more. Here’s how to do it.September 4, 2024JSR
[H3] Painting the Plane as We Fly It: Designing JSR
JSR, created for the JavaScript community, needed a logo and a website to look distinct, friendly, and inclusive. Here's how we approached this design problem.August 27, 2024Deno Deploy Product Update
[H3] Introducing Web Cache API support on Deno Deploy
The Web Cache API offers sub-millisecond read latency, multi-Gbps write throughput, and unbounded storage. Here’s how you can use it.August 22, 2024Product Update
[H3] Deno 1.46: The Last 1.x Release
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.August 8, 2024Deno Deploy Product Update

[H1] Deno for Enterprise
Get expert Deno runtime support tailored to your business needsGet in touchTrusted by Enterprises
[IMG: Slack]
[IMG: Netlify]
[IMG: GitHub]
[IMG: Supabase]
[IMG: Spotify]
[IMG: Slack]
[IMG: Netlify]
[IMG: GitHub]
[IMG: Supabase]
[IMG: Spotify]
[IMG: Salesforce]
[IMG: Stripe]
[IMG: Bank of America]
[IMG: Tencent]
[IMG: Salesforce]
[IMG: Stripe]
[IMG: Bank of America]
[IMG: Tencent]
*Companies shown use Deno, but may not necessarily be Deno for Enterprise customers
[IMG: ISO/IEC 27001:2022 certified]
[IMG: SOC 2 Type II texted & attested by Prescient Assurance]
[H2] See why companies trust Deno
View case studiesNow offering
[H2] Enterprise support plan
For companies seeking support for projects using the Deno open-source runtimePriority support through a 1:1 slack channelGuaranteed response timesPrioritized feature requestsGet in touchNote: these services are meant to support projects using the Deno runtime, and do not extend to Deno’s cloud products (unless requested)
[H2] Case studies
[H3] How Netlify used Deno Subhosting to build a successful edge functions product
Read the case study›
[H3] How Slack used Deno to save months of engineering effort in launching their new platform
Read the case study›
[H3] How Brazil's top ecommerce platform used Deno Subhosting to drive 5x faster page load speeds
Read the case study›
[H2] What can Deno do for you?
Let's talk. We'd love to hear from you.
[H3] Get in touch