std-env 3.10.0: hasWindow

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify std-env.hasWindow in pkg:npm/std-env@3.10.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/std-env@3.10.0
Demonstrate these symbols/APIs:
  - std-env.hasWindow

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:92337ac2fe1d800561a8881437c49f743ad273aeb237b7b9dfb94a61b6a52eca","contract":["hasWindow is a boolean that evaluates to false in the default Node.js environment","hasWindow matches typeof window !== 'undefined'"],"goal":"verify std-env.hasWindow in pkg:npm/std-env@3.10.0","kind":"HOW","packages":["pkg:npm/std-env@3.10.0"],"schemaVersion":1,"symbols":["std-env.hasWindow"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/std-env@3.10.0"],"schemaVersion":1,"subject":"pkg:npm/std-env@3.10.0","symbols":["std-env.hasWindow"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-std-env-has-window",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-std-env-has-window",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "std-env": "3.10.0"
      }
    },
    "node_modules/std-env": {
      "version": "3.10.0",
      "resolved": "https://registry.npmjs.org/std-env/-/std-env-3.10.0.tgz",
      "integrity": "sha512-5GS12FdOZNliM5mAOxFRg7Ir0pWz8MdpYm6AY6VPkGpbA7ZzmbzNcBJQ0GPvvyWgcY7QAhCgf9Uy89I03faLkg==",
      "license": "MIT"
    }
  }
}

{
  "name": "sample-std-env-has-window",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "dependencies": {
    "std-env": "3.10.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify std-env.hasWindow in pkg:npm/std-env@3.10.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/std-env@3.10.0"
  ],
  "symbols": [
    "std-env.hasWindow"
  ]
}

import assert from 'node:assert/strict';
import { hasWindow } from 'std-env';

assert.strictEqual(typeof hasWindow, 'boolean', 'hasWindow is a boolean');
assert.strictEqual(hasWindow, false, 'hasWindow evaluates to false in default Node.js runtime');
assert.strictEqual(hasWindow, typeof window !== 'undefined', 'hasWindow matches typeof window !== "undefined"');