How to Use Deno Deploy Playground: Quick Guide

The Deno Deploy Playground is an online tool where you can write and run Deno scripts instantly in your browser without setup. Simply visit the playground, write your code in the editor, and click Run to see the output. You can also share your code via a link or deploy it directly from the playground.

Syntax

The Deno Deploy Playground uses a simple pattern to run scripts:

• import statements to include modules.
• Async functions to handle asynchronous code.
• console.log() to output results.
• Top-level await is supported for simplicity.

You write your code in the editor and use the Run button to execute it.

typescript

import { serve } from "https://deno.land/std@0.203.0/http/server.ts";

serve(() => new Response("Hello from Deno Deploy Playground!"));

Output

HTTP server running, responding with "Hello from Deno Deploy Playground!"

Example

This example shows a simple HTTP server that responds with a greeting message. It demonstrates how to import modules and use the serve function in the playground.

typescript

import { serve } from "https://deno.land/std@0.203.0/http/server.ts";

serve(() => new Response("Hello from Deno Deploy Playground!"));

Output

HTTP server running, responding with "Hello from Deno Deploy Playground!"

Common Pitfalls

Some common mistakes when using the Deno Deploy Playground include:

• Not using full URLs for imports, which causes errors because the playground fetches modules from URLs.
• Trying to use Node.js-specific APIs that Deno does not support.
• Forgetting that the playground runs code in a sandboxed environment, so some permissions or APIs may be limited.

Always use Deno-compatible code and import modules via URLs.

typescript

/* Wrong: local import (won't work in playground) */
// import { serve } from "./server.ts";

/* Right: import from URL */
import { serve } from "https://deno.land/std@0.203.0/http/server.ts";

serve(() => new Response("Hello!"));

Quick Reference

• Write code: Use the editor to type your Deno script.
• Run code: Click the Run button to execute.
• Share code: Use the Share button to get a link.
• Deploy: Use the Deploy option to publish your script on Deno Deploy.
• Imports: Always import modules using full URLs.

Key Takeaways

Use the Deno Deploy Playground to write and run Deno scripts instantly in your browser.

Always import modules using full URLs to avoid errors.

The playground supports top-level await and async code for simplicity.

You can share your code via links or deploy it directly from the playground.

Avoid Node.js-specific APIs; use Deno-compatible code only.