Web development

Deno offers a secure and developer-friendly environment for building web applications, making your web dev a delightful experience.

1. Deno has secure defaults, meaning it requires explicit permission for file, network, and environment access, reducing the risk of security vulnerabilities.
2. Deno has built-in TypeScript support, allowing you to write TypeScript code without additional configuration or tooling.
3. Deno comes with a standard library that includes modules for common tasks like HTTP servers, file system operations, and more.

Most likely, if you're building a more complex application, you'll be interacting with Deno through a web framework.

React/Next Jump to heading#

React is a popular JavaScript library for building user interfaces. To use React with Deno, you can use the popular web framework Next.js.

To get started with Next.js in Deno, you can create a new next app and run it immediately with Deno:

deno run -A npm:create-next-app@latest my-next-app
cd my-next-app
deno task dev

This will create a new Next.js app with TypeScript and run it with Deno. You can then open your browser to http://localhost:3000 to see your new app, and start editing page.tsx to see your changes live.

To better understand how JSX and Deno interface under the hood, read on here.

Fresh Jump to heading#

Fresh is the most popular web framework for Deno. It uses a model where you send no JavaScript to clients by default.

To get started with a Fresh app, you can use the following command and follow the cli prompts to create your app:

deno run -A -r https://fresh.deno.dev
cd my-fresh-app
deno task start

This will create a new Fresh app and run it with Deno. You can then open your browser to http://localhost:8000 to see your new app. Edit /routes/index.tsx to see your changes live.

Fresh does the majority of its rendering on the server, and the client is only responsible for re-rendering small islands of interactivity. This means the developer explicitly opts in to client side rendering for specific components.

Astro Jump to heading#

Astro is a static site generator that allows developers to create fast and lightweight websites.

To get started with Astro, you can use the following command to create a new Astro site:

deno run -A npm:create-astro my-astro-site
cd my-astro-site
deno task dev

This will create a new Astro site and run it with Deno. You can then open your browser to http://localhost:4321 to see your new site. Edit /src/pages/index.astro to see your changes live.

Vite Jump to heading#

Vite is a web dev build tool that serves your code via native ES modules, which can be run directly in the browser. Vite is a great choice for building modern web applications with Deno.

To get started with Vite, you can use the following command to create a new Vite app:

deno run -A npm:create-vite@latest
cd my-vite-app
deno install
deno task dev

Lume Jump to heading#

Lume is a static site generator for Deno that is inspired by other static site generators such Jekyll or Eleventy.

To get started with Lume, you can use the following command to create a new Lume site:

mkdir my-lume-site
cd my-lume-site
deno run -A https://lume.land/init.ts
deno task serve

Docusaurus Jump to heading#

Docusaurus is a static site generator that is optimized for technical documentation websites.

To get started with Docusaurus, you can use the following command to create a new Docusaurus site:

deno run -A npm:create-docusaurus@latest my-website classic
cd my-website
deno task start

Hono Jump to heading#

Hono is a light-weight web app framework in the tradition of Express and Sinatra.

To get started with Hono, you can use the following command to create a new Hono app:

deno run -A npm:create-hono@latest
cd my-hono-app
deno task start

This will create a new Hono app and run it with Deno. You can then open your browser to http://localhost:8000 to see your new app.

Oak Jump to heading#

Oak is a middleware framework for handling HTTP with Deno. Oak is the glue between your frontend application and a potential database or other data sources (e.g. REST APIs, GraphQL APIs).

Oak offers additional functionality over the native Deno HTTP server, including a basic router, JSON parser, middlewares, plugins, etc.

To get started with Oak, make a file called server.ts and add the following:

import { Application } from "jsr:@oak/oak/application";
import { Router } from "jsr:@oak/oak/router";

const router = new Router();
router.get("/", (ctx) => {
  ctx.response.body = `<!DOCTYPE html>
    <html>
      <head><title>Hello oak!</title><head>
      <body>
        <h1>Hello oak!</h1>
      </body>
    </html>
  `;
});

const app = new Application();
const port = 8080;

app.use(router.routes());
app.use(router.allowedMethods());
console.log(`Server running on http://localhost:${port}`);

app.listen({ port: port });

Run the server with the following command:

deno run --allow-net server.ts

Node projects Jump to heading#

Deno will run your Node.js projects out the box. Check out our guide on migrating your Node.js project to Deno.