🎉 version 1.0.0

.gitignore

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+# https://github.com/github/gitignore/blob/master/Node.gitignore
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# next.js build output
+.next
+
+yarn.lock
+
+lib

.npmrc

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+package-lock=false

.travis.yml

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+language: node_js
+
+node_js:
+  - "8"
+  - "10"
+
+after_success: npm run test && npm run coverage
+
+jobs:
+  include:
+    - stage: npm release
+      node_js: 10
+      script: echo "deploying to npm"
+      deploy:
+        provider: npm
+        email: uniquecolesmith@gmail.com
+        api_key: $NPM_AUTH_TOKEN
+        skip_cleanup: true
+        on:
+          tags: true

LICENSE

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+MIT License
+
+Copyright (c) 2018 Eason
+
+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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+# is-up
+
+[![NPM version](https://img.shields.io/npm/v/@zcorky/is-up.svg?style=flat)](https://www.npmjs.com/package/@zcorky/is-up)
+[![Coverage Status](https://img.shields.io/coveralls/zcorky/is-up.svg?style=flat)](https://coveralls.io/r/zcorky/is-up)
+[![Dependencies](https://david-dm.org/@zcorky/is-up/status.svg)](https://david-dm.org/@zcorky/is-up)
+[![Build Status](https://travis-ci.com/zcorky/is-up.svg?branch=master)](https://travis-ci.com/zcorky/is-up)
+![license](https://img.shields.io/github/license/zcorky/is-up.svg)
+[![issues](https://img.shields.io/github/issues/zcorky/is-up.svg)](https://github.com/zcorky/is-up/issues)
+
+> Check whether a website is up or down using the [isitup.org](https://isitup.org/) API
+
+### Install
+
+```
+$ npm install @zcorky/is-up
+```
+
+### Usage
+
+```javascript
+import isUp from '@zcorky/is-up';
+// const isUp = require('@zcorky/is-up').isUp;
+
+(async () => {
+	console.log(await isUp('https://sindresorhus.com'));
+	//=> true
+})();
+```
+
+### Related
+* [sindresorhus/is-up](https://github.com/sindresorhus/is-up)

package.json

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+{
+  "name": "@zcorky/is-up",
+  "version": "1.0.0",
+  "description": "Give a is-up for your app.",
+  "main": "lib/index.js",
+  "repository": "https://github.com/zcorky/is-up",
+  "author": "Zero",
+  "license": "MIT",
+  "scripts": {
+    "build": "npm run clean && tsc",
+    "clean": "rimraf -rf lib",
+    "test": "NODE_ENV=test nyc mocha test/*.spec.ts --exit --timeout 10000",
+    "coverage": "nyc report --reporter=text-lcov | coveralls",
+    "prepublish": "npm run build"
+  },
+  "devDependencies": {
+    "@types/mocha": "^5.2.5",
+    "@types/node": "^10.9.4",
+    "@types/sinon": "^5.0.2",
+    "@zcorky/is": "^1.0.1",
+    "chai": "^4.1.2",
+    "chai-spies": "^1.0.0",
+    "coveralls": "^3.0.2",
+    "mocha": "^5.2.0",
+    "nyc": "^13.0.1",
+    "rimraf": "^2.6.2",
+    "sinon": "^6.3.4",
+    "source-map-support": "^0.5.9",
+    "ts-node": "^7.0.1",
+    "tslint": "^5.10.0",
+    "tslint-eslint-rules": "^5.3.1",
+    "tslint-jsdoc-rules": "^0.1.2",
+    "typescript": "^3.1.1"
+  },
+  "files": [
+    "lib/"
+  ],
+  "nyc": {
+    "check-coverage": true,
+    "include": [
+      "src/**/*.ts"
+    ],
+    "extension": [
+      ".ts"
+    ],
+    "require": [
+      "ts-node/register",
+      "source-map-support/register"
+    ],
+    "sourceMap": true,
+    "instrument": true
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "@zcorky/fz": "^1.0.2",
+    "isomorphic-fetch": "^2.2.1"
+  }
+}

src/index.ts

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+import fz from '@zcorky/fz';
+import * as engine from 'isomorphic-fetch';
+
+const STATUS_CODES = {
+  isUp: 1,
+  // isDown: 2,
+  invalidDomain: 3,
+};
+
+export const isUp = async (url: string) => {
+  const _url = encodeURIComponent(url.replace(/^(?:https?:)?\/\//, ''));
+  const { status_code: statusCode } = await fz.get(`https://isitup.org/${_url}.json`, {
+    engine,
+    headers: {
+      userAgent: 'https://github.com/zcorky/is-up',
+    },
+  }).json() as any;
+
+  if (statusCode === STATUS_CODES.invalidDomain) {
+    throw new Error('Invalid domain');
+  }
+
+  return statusCode === STATUS_CODES.isUp;
+}
+
+export default isUp;
+
+// module.exports = isUp;

test/index.spec.ts

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+import { expect } from 'chai';
+
+import isUp from '../src/index';
+
+console.log(typeof isUp);
+
+describe('is-up', () => {
+  it('up', async () => {
+    expect(await isUp('https://google.com')).to.be.true;
+  });
+
+  it('down', async () => {
+    expect(await isUp('https://example.abc.com')).to.be.false;
+  });
+
+  it('invalid domain', async () => {
+    try {
+      await isUp('unicorn');
+      throw new Error('never match');
+    } catch (e) {
+      expect(e).to.match(/Invalid domain/);
+    }
+  });
+});

tsconfig.json

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+{
+    "compilerOptions": {
+        "moduleResolution": "node",
+        "module": "commonjs",
+        "target": "es5",
+        "strictNullChecks": true,
+        "noImplicitThis": false,
+        "noUnusedLocals": true,
+        "noImplicitAny": false,
+        "outDir": "lib",
+        "lib": ["dom", "es2015"],
+        "declaration": true,
+        "sourceMap": false,
+        "removeComments": true,
+        "baseUrl": "./",
+        "paths": {
+            "@/*": ["src/*"],
+            "lib/*": ["src/*"]
+        }
+    },
+    "include": ["src/**/*.ts"]
+}