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About Deno Deploy

Deno Deploy is a distributed system that allows you to run JavaScript, TypeScript, and WebAssembly close to users, at the edge, worldwide. Deeply integrated with the V8 runtime, our servers provide minimal latency and eliminate unnecessary abstractions. You can develop your script locally using the Deno CLI, and then deploy it to our managed infrastructure in less than a second, without the need to configure anything.

Built on the same modern systems as the Deno CLI, Deno Deploy provides the latest and greatest in web technologies in a globally scalable way:

  • Builds on the Web: use fetch, WebSocket, or URL just like in the browser
  • Built-in support for TypeScript and JSX: type safe code, and intuitive server side rendering without a build step
  • Web compatible ES modules: import dependencies just like in a browser, without the need for explicit installation
  • Direct GitHub integration: push to a branch, review a deployed preview, and merge to release to production
  • Extremely fast: deploy in less than a second, serve globally close to users

Use cases​

Some popular use-cases for Deno currently are:

Middleware​

Middleware refers to bits of code that execute before and after the request gets to the application server. You'll be writing middleware if you want to execute some JavaScript or any other code very fast, early in the request. By deploying your middleware code at the edge, Deno Deploy ensures the best performance for your app.

Some examples include:

  • setting a cookie
  • serving different versions of a site depending on geolocation
  • path rewriting
  • redirecting requests
  • dynamically changing the HTML on its way back from the server before it gets to the user.

Deno Deploy is a good alternative to other platforms you might be using to host your middleware right now, for example:

  • Cloudflare Workers
  • AWS Lambda@Edge
  • Traditional load balancers like nginx
  • Custom rules

API servers​

Deno is also a great fit for API servers. By deploying these servers "at the edge", closer to clients who are using them, Deno Deploy is able to offer lower latency, improved performance, and reduced bandwidth costs compared to traditional hosting platforms like Heroku or even modern centralized hosting services like DigitalOcean.

Full websites​

We foresee a future where you can actually write your entire website on edge functions. Some examples of sites that are already doing this include: