Deno

Run Commands

Run TypeScript and JavaScript files with Deno's secure runtime. Control permissions for network, file system, and environment access.

10 commands

Pro Tips

Use '-A' to allow all permissions during development (not production).

Specify granular permissions like '--allow-net=api.example.com'.

Use '--watch' to auto-restart on file changes during development.

Common Mistakes

Never use '-A' in production - grant minimum required permissions.

Deno doesn't read .env files by default - use '--env' flag or std/dotenv.

Commands

Run Script

$ deno run script.ts

Execute a TypeScript/JavaScript file

Run with All Permissions

$ deno run -A script.ts

Run script with all permissions (dev only)

Allow Environment Access

$ deno run --allow-env script.ts

Run with environment variable access

Allow Network Access

$ deno run --allow-net script.ts

Run with network permission

Allow Specific Host

$ deno run --allow-net=api.example.com script.ts

Allow network access to specific host only

Allow File Read

$ deno run --allow-read script.ts

Run with file read permission

Allow File Write

$ deno run --allow-write script.ts

Run with file write permission

Run from URL

$ deno run https://deno.land/std/examples/welcome.ts

Execute script directly from URL

Watch Mode

$ deno run --watch script.ts

Auto-restart on file changes

Serve HTTP

$ deno serve --port 8000 server.ts

Run HTTP server with Deno.serve