Extract window function from browser-env

.gitignore

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+node_modules
+.nyc_output
+npm-debug.log

.travis.yml

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+language: node_js
+node_js:
+  - '6'
+  - '5'
+  - '4'
+script: npm run lint && npm test
+after_success: npm run coverage
+notifications:
+  email:
+    on_success: never

LICENSE

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+MIT License
+
+Copyright (c) 2016 Luke Childs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# window [![Build Status](https://travis-ci.org/lukechilds/window.svg?branch=master)](https://travis-ci.org/lukechilds/window) [![Coverage Status](https://coveralls.io/repos/github/lukechilds/window/badge.svg?branch=master)](https://coveralls.io/github/lukechilds/window?branch=master) [![npm](https://img.shields.io/npm/dm/window.svg)](https://www.npmjs.com/package/window)
+
+> Exports a [`jsdom`](https://github.com/tmpvar/jsdom) window object.
+
+## Install
+
+```shell
+npm install --save window
+```
+
+Or if you're just using for testing you'll probably want:
+
+```shell
+npm install --save-dev window
+```
+
+## License
+
+MIT © Luke Childs

package.json

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+{
+  "name": "window",
+  "version": "1.0.0",
+  "description": "Exports a jsdom window object.",
+  "main": "src/index.js",
+  "engines": {
+    "node": ">=4"
+  },
+  "scripts": {
+    "test": "nyc ava test",
+    "lint": "eslint src",
+    "coverage": "nyc report --reporter=text-lcov | coveralls"
+  },
+  "eslintConfig": {
+    "extends": "lukechilds",
+    "rules": {
+      "prefer-rest-params": "off"
+    }
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/lukechilds/window.git"
+  },
+  "keywords": [
+    "export",
+    "jsdom",
+    "window",
+    "object",
+    "simulate",
+    "node",
+    "browser",
+    "environment",
+    "env"
+  ],
+  "author": "Luke Childs <lukechilds123@gmail.com> (http://lukechilds.co.uk)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/lukechilds/window/issues"
+  },
+  "homepage": "https://github.com/lukechilds/window#readme",
+  "dependencies": {
+    "clone": "2.1.0",
+    "jsdom": "9.11.0"
+  },
+  "devDependencies": {
+    "ava": "^0.18.0",
+    "coveralls": "^2.11.13",
+    "eslint": "^3.5.0",
+    "eslint-config-lukechilds": "^1.9.0",
+    "nyc": "^10.0.0"
+  }
+}

src/index.js

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+const jsdom = require('jsdom');
+const clone = require('clone');
+
+// Function to return a window object.
+// Accepts a jsdom config object.
+// Config object must be cloned before passing through otherwise jsdom will add
+// lots of properties to the original reference.
+module.exports = window = (jsdomConfig = {}) => jsdom.jsdom('', clone(jsdomConfig)).defaultView;

test/types.js

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+import test from 'ava';
+import window from '../';
+
+test('mergeImages is a function', t => {
+	t.is(typeof window, 'function');
+});