deno

name	deno
description	Deno runtime, Deploy, Fresh framework, KV, npm compatibility, and secure-by-default JavaScript/TypeScript
layer	domain
category	runtime
triggers	["deno","deno deploy","fresh framework","deno kv","deno.json","deno.lock","deno serve","deno compile"]
inputs	["Runtime requirements and constraints","Deployment target (Deno Deploy, self-hosted)","Framework choice (Fresh, Hono, bare Deno)"]
outputs	["Deno project structure and configuration","Fresh routes and islands","Deno Deploy configuration","KV storage patterns"]
linksTo	["nodejs","typescript-frontend","hono","vercel"]
linkedFrom	[]
preferredNextSkills	["hono","typescript-frontend"]
fallbackSkills	["nodejs","bun"]
riskLevel	low
memoryReadPolicy	selective
memoryWritePolicy	none
sideEffects	["deployments"]

Deno

Purpose

Build and deploy secure-by-default TypeScript/JavaScript applications using Deno 2.x. Covers the Deno runtime, Fresh framework for full-stack web apps, Deno KV for built-in key-value storage, Deno Deploy for edge hosting, and npm compatibility for leveraging the existing ecosystem.

Core Patterns

deno.json Configuration

{
  "tasks": {
    "dev": "deno run --watch --allow-net --allow-read --allow-env main.ts",
    "start": "deno run --allow-net --allow-read --allow-env main.ts",
    "test": "deno test --allow-all",
    "check": "deno check **/*.ts",
    "fmt": "deno fmt",
    "lint": "deno lint"
  },
  "imports": {
    "@std/http": "jsr:@std/http@^1.0.0",
    "@std/assert": "jsr:@std/assert@^1.0.0",
    "@std/path": "jsr:@std/path@^1.0.0",
    "hono": "jsr:@hono/hono@^4.0.0"