Fix #1 Refactoring

.eslintrc.js

@@ -0,0 +1,50 @@
+module.exports = {
+  env: {
+    browser: true,
+    es6: true,
+    mocha: true,
+    greasemonkey: true,
+  },
+  extends: [
+    'eslint:recommended',
+    'plugin:prettier/recommended',
+    'prettier/@typescript-eslint',
+  ],
+  plugins: ['prettier', '@typescript-eslint'],
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    sourceType: 'module',
+    ecmaVersion: '2020',
+    project: ['./tsconfig.json']
+  },
+  rules: {
+    'prettier/prettier': [
+      'error',
+      {
+        singleQuote: true,
+        trailingComma: 'all',
+      },
+    ],
+    'linebreak-style': ['error', 'unix'],
+    quotes: ['error', 'single'],
+    semi: ['error', 'always'],
+    eqeqeq: ['error', 'always'],
+    'arrow-body-style': 'error',
+    'arrow-spacing': 'error',
+    'generator-star-spacing': 'error',
+    'no-duplicate-imports': 'error',
+    'no-useless-computed-key': 'error',
+    'no-useless-constructor': 'error',
+    'no-useless-rename': 'error',
+    'no-var': 'error',
+    'object-shorthand': 'error',
+    'prefer-arrow-callback': 'error',
+    'prefer-const': 'error',
+    'prefer-rest-params': 'error',
+    'prefer-spread': 'error',
+    'prefer-template': 'error',
+    'rest-spread-spacing': 'error',
+    'template-curly-spacing': 'error',
+    'yield-star-spacing': 'error',
+  },
+};

.gitignore

@@ -0,0 +1,89 @@
+
+# Created by https://www.gitignore.io/api/node
+
+### Node ###
+# 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 (http://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
+
+# End of https://www.gitignore.io/api/node
+
+# Created by https://www.gitignore.io/api/tags
+
+### Tags ###
+# Ignore tags created by etags, ctags, gtags (GNU global) and cscope
+TAGS
+.TAGS
+!TAGS/
+tags
+.tags
+!tags/
+gtags.files
+GTAGS
+GRTAGS
+GPATH
+GSYMS
+cscope.files
+cscope.out
+cscope.in.out
+cscope.po.out
+
+# End of https://www.gitignore.io/api/tags
+
+build/
+.tern-port

.travis.yml

@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+  - "11.15.0"