Add Base Files

.babelrc.js

@@ -0,0 +1,29 @@
+module.exports = {
+  plugins: [
+    require(`@babel/plugin-proposal-class-properties`),
+    require(`@babel/plugin-proposal-object-rest-spread`)
+  ],
+  presets: [
+    require(`@babel/preset-typescript`),
+    [
+      require(`@babel/preset-env`),
+      { targets: { node: true }, modules: false, useBuiltIns: `usage`, corejs: 3 }
+    ]
+  ],
+  env: {
+    test: {
+      sourceMaps: `inline`,
+      presets: [
+        [
+          require(`@babel/preset-env`),
+          {
+            targets: { node: true },
+            modules: `commonjs`,
+            useBuiltIns: `usage`,
+            corejs: 3
+          }
+        ]
+      ]
+    }
+  }
+}

.eslintrc.js

@@ -0,0 +1,361 @@
+const { join } = require(`path`)
+
+const srcDir = join(__dirname, `src`)
+
+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  env: {
+    es6: true,
+    node: true,
+    browser: true,
+    "jest/globals": true
+  },
+  plugins: [
+    "@typescript-eslint", // https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/eslint-plugin
+    `jest`, // https://github.com/jest-community/eslint-plugin-jest
+    `import`, // https://github.com/benmosher/eslint-plugin-import
+    `promise` // https://github.com/xjamundx/eslint-plugin-promise
+  ],
+  settings: {
+    polyfills: [`fetch`, `Promise`]
+  },
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: `module`
+  },
+  rules: {
+    // Possible Errors
+    "for-direction": 2,
+    "no-await-in-loop": 2,
+    "no-compare-neg-zero": 2,
+    "no-cond-assign": [2, `always`],
+    "no-console": 2,
+    "no-constant-condition": 1,
+    "no-control-regex": 2,
+    "no-debugger": 1,
+    "no-dupe-args": 2,
+    "no-dupe-keys": 2,
+    "no-duplicate-case": 2,
+    "no-empty": 2,
+    "no-empty-character-class": 2,
+    "no-ex-assign": 2,
+    "no-extra-boolean-cast": 2,
+    "no-extra-parens": [2, `functions`],
+    "no-extra-semi": 0,
+    "no-func-assign": 2,
+    "no-inner-declarations": 2,
+    "no-invalid-regexp": 2,
+    "no-irregular-whitespace": 2,
+    "no-obj-calls": 2,
+    "no-prototype-builtins": 2,
+    "no-regex-spaces": 2,
+    "no-sparse-arrays": 2,
+    "no-template-curly-in-string": 2,
+    "no-unexpected-multiline": 0,
+    "no-unreachable": 2,
+    "no-unsafe-finally": 2,
+    "no-unsafe-negation": 2,
+    "use-isnan": 2,
+    "valid-jsdoc": 0,
+    "valid-typeof": 2,
+
+    // Best Practices
+    "accessor-pairs": 2,
+    "array-callback-return": 1,
+    "block-scoped-var": 2,
+    "class-methods-use-this": 0,
+    complexity: [0, { max: 20 }],
+    "consistent-return": 0,
+    curly: [2, `multi-line`],
+    "default-case": 2,
+    "dot-location": [2, `property`],
+    "dot-notation": [2, { allowKeywords: true }],
+    eqeqeq: [2, `smart`],
+    "guard-for-in": 2,
+    "no-alert": 2,
+    "no-caller": 2,
+    "no-case-declarations": 2,
+    "no-div-regex": 2,
+    "no-else-return": 2,
+    "no-empty-function": [2, { allow: [`arrowFunctions`, `constructors`] }],
+    "no-empty-pattern": 2,
+    "no-eq-null": 2,
+    "no-eval": 2,
+    "no-extend-native": 2,
+    "no-extra-bind": 2,
+    "no-extra-label": 2,
+    "no-fallthrough": 2,
+    "no-floating-decimal": 2,
+    "no-global-assign": 2,
+    "no-implicit-coercion": 0,
+    "no-implicit-globals": 0,
+    "no-implied-eval": 2,
+    "no-invalid-this": 0,
+    "no-iterator": 2,
+    "no-labels": 2,
+    "no-lone-blocks": 2,
+    "no-loop-func": 2,
+    "no-magic-numbers": 0,
+    "no-multi-spaces": [
+      2,
+      {
+        exceptions: {
+          Property: true,
+          VariableDeclarator: true,
+          ImportDeclaration: true
+        }
+      }
+    ],
+    "no-multi-str": 2,
+    "no-new": 2,
+    "no-new-func": 2,
+    "no-new-wrappers": 2,
+    "no-octal": 2,
+    "no-octal-escape": 2,
+    "no-param-reassign": 2,
+    "no-proto": 2,
+    "no-redeclare": 2,
+    "no-restricted-properties": 0,
+    "no-return-assign": [2, `always`],
+    "no-return-await": 2,
+    "no-script-url": 2,
+    "no-self-assign": [2, { props: true }],
+    "no-self-compare": 2,
+    "no-sequences": 2,
+    "no-throw-literal": 2,
+    "no-unmodified-loop-condition": 2,
+    "no-unused-expressions": 0,
+    "no-unused-labels": 2,
+    "no-useless-call": 2,
+    "no-useless-concat": 2,
+    "no-useless-escape": 2,
+    "no-useless-return": 2,
+    "no-void": 2,
+    "no-warning-comments": 0,
+    "no-with": 2,
+    "prefer-promise-reject-errors": 2,
+    radix: 2,
+    "require-await": 2,
+    "vars-on-top": 2,
+    "wrap-iife": [2, `any`],
+    yoda: 2,
+
+    // Strict Mode
+    strict: [2, `never`],
+
+    // Variables
+    "init-declarations": 0,
+    "no-catch-shadow": 0,
+    "no-delete-var": 2,
+    "no-label-var": 2,
+    "no-restricted-globals": 0,
+    "no-shadow": 2,
+    "no-shadow-restricted-names": 2,
+    "no-undef": 2,
+    "no-undef-init": 2,
+    "no-undefined": 2,
+    "no-use-before-define": [2, { functions: true, classes: true }],
+
+    // Node.js and CommonJS
+    "callback-return": 0,
+    "global-require": 0,
+    "handle-callback-err": 2,
+    "no-buffer-constructor": 2,
+    "no-mixed-requires": 0,
+    "no-new-require": 2,
+    "no-path-concat": 0,
+    "no-process-env": 0,
+    "no-process-exit": 0,
+    "no-restricted-modules": 0,
+    "no-sync": 0,
+
+    // Stylistic Issues
+    "array-bracket-newline": [2, { multiline: true }],
+    "array-bracket-spacing": 2,
+    "array-element-newline": 0,
+    "block-spacing": [2, `always`],
+    "brace-style": [2, `1tbs`, { allowSingleLine: true }],
+    camelcase: [2, { properties: `never` }],
+    "capitalized-comments": 0,
+    "comma-dangle": [2, `never`],
+    "comma-spacing": [2, { before: false, after: true }],
+    "comma-style": [2, `last`],
+    "computed-property-spacing": 2,
+    "consistent-this": 0,
+    "eol-last": 2,
+    "func-call-spacing": 2,
+    "func-name-matching": 0,
+    "func-names": 0,
+    "func-style": [2, `declaration`, { allowArrowFunctions: true }],
+    "function-paren-newline": [0, `consistent`],
+    "id-blacklist": 0,
+    "id-length": 0,
+    "id-match": 0,
+    indent: 0, // Incompatible with Prettier
+    "jsx-quotes": [2, `prefer-double`],
+    "key-spacing": 0,
+    "keyword-spacing": [2, { before: true, after: true }],
+    "line-comment-position": 0,
+    "linebreak-style": 0,
+    "lines-around-comment": 0,
+    "lines-between-class-members": [2, `always`, { exceptAfterSingleLine: true }],
+    "max-depth": 0,
+    "max-len": 0,
+    "max-lines": 0,
+    "max-nested-callbacks": 0,
+    "max-params": 0,
+    "max-statements": 0,
+    "max-statements-per-line": 0,
+    "multiline-comment-style": 0,
+    "multiline-ternary": [2, `always-multiline`],
+    "new-cap": [2, { newIsCap: true }],
+    "new-parens": 2,
+    "newline-per-chained-call": 0,
+    "no-array-constructor": 0,
+    "no-bitwise": [2, { allow: [`~`] }],
+    "no-continue": 2,
+    "no-inline-comments": 0,
+    "no-lonely-if": 2,
+    "no-mixed-operators": 0,
+    "no-mixed-spaces-and-tabs": [2, `smart-tabs`],
+    "no-multi-assign": 2,
+    "no-multiple-empty-lines": [2, { max: 2 }],
+    "no-negated-condition": 2,
+    "no-nested-ternary": 0,
+    "no-new-object": 2,
+    "no-plusplus": 0,
+    "no-restricted-syntax": 0,
+    "no-tabs": 0,
+    "no-ternary": 0,
+    "no-trailing-spaces": 2,
+    "no-underscore-dangle": 0,
+    "no-unneeded-ternary": 2,
+    "no-whitespace-before-property": 2,
+    "nonblock-statement-body-position": 0,
+    "object-curly-newline": [
+      2,
+      {
+        ObjectExpression: { consistent: true },
+        ObjectPattern: { consistent: true }
+      }
+    ],
+    "object-curly-spacing": [2, `always`],
+    "object-property-newline": [2, { allowMultiplePropertiesPerLine: true }],
+    "one-var": [2, `never`],
+    "one-var-declaration-per-line": [2, `always`],
+    "operator-assignment": [2, `always`],
+    "operator-linebreak": 0,
+    "padded-blocks": [2, `never`],
+    "padding-line-between-statements": 0,
+    "quote-props": [2, "as-needed"],
+    quotes: 0, // Conflicts with TypeScript, use TypeScript Plugin Rule Instead
+    "require-jsdoc": 0,
+    semi: [0, `never`],
+    "semi-spacing": [2, { before: false, after: true }],
+    "semi-style": [2, `last`],
+    "sprt-keys": 0,
+    "sort-vars": 0,
+    "space-before-blocks": 2,
+    "space-before-function-paren": [2, { anonymous: `never`, named: `never`, asyncArrow: `always` }],
+    "space-in-parens": [2, `never`],
+    "space-infix-ops": 2,
+    "space-unary-ops": [2, { words: true, nonwords: false }],
+    "spaced-comment": [0, `always`, { plugins: [`react`], exceptions: [`*`], markers: [`*`] }],
+    "switch-colon-spacing": [2, { before: false, after: true }],
+    "template-tag-spacing": [2, `never`],
+    "unicode-bom": 0,
+    "wrap-regex": 0,
+
+    // ECMAScript 6
+    "arrow-body-style": [2, `as-needed`],
+    "arrow-parens": [2, `as-needed`],
+    "arrow-spacing": [2, { before: true, after: true }],
+    "constructor-super": 0,
+    "generator-star-spacing": [2, { before: true, after: false }],
+    "no-class-assign": 2,
+    "no-confusing-arrow": 0,
+    "no-const-assign": 2,
+    "no-dupe-class-members": 2,
+    "no-duplicate-imports": 2,
+    "no-new-symbol": 2,
+    "no-restricted-imports": 0,
+    "no-this-before-super": 2,
+    "no-useless-computed-key": 2,
+    "no-useless-constructor": 2,
+    "no-useless-rename": 2,
+    "no-var": 2,
+    "object-shorthand": [2, `properties`],
+    "prefer-arrow-callback": 2,
+    "prefer-const": 0,
+    "prefer-destructuring": 0,
+    "prefer-numeric-literals": 2,
+    "prefer-rest-params": 2,
+    "prefer-spread": 2,
+    "prefer-template": 2,
+    "require-yield": 2,
+    "rest-spread-spacing": [2, `never`],
+    "sort-imports": 0,
+    "symbol-description": 2,
+    "template-curly-spacing": [2, `never`],
+    "yield-star-spacing": [2, { before: false, after: true }],
+
+    /*--- Plugin Specific Rules ---*/
+    // typescript
+    "@typescript-eslint/prefer-interface": 0,
+    "@typescript-eslint/explicit-function-return-type": 0,
+    "@typescript-eslint/no-use-before-define": 0,
+    "@typescript-eslint/camelcase": 0,
+    "@typescript-eslint/no-var-requires": 0,
+    "@typescript-eslint/no-unused-vars": ["error", { vars: "local", args: "none", ignoreRestSiblings: true }],
+    "@typescript-eslint/quotes": ["error", "backtick", { avoidEscape: true }],
+
+    // jest
+    "jest/consistent-test-it"                   : 2,
+    "jest/lowercase-name"                       : 0,
+    "jest/no-disabled-tests"                    : 1,
+    "jest/no-focused-tests"                     : 2,
+    "jest/no-hooks"                             : 0,
+    "jest/no-identical-title"                   : 2,
+    "jest/no-jest-import"                       : 2,
+    "jest/no-large-snapshots"                   : [1, { "maxSize": 12 }],
+    "jest/no-test-prefixes"                     : 2,
+    "jest/prefer-to-have-length"                : 1,
+    "jest/prefer-to-be-null"                    : 1,
+    "jest/prefer-to-be-undefined"               : 1,
+    "jest/prefer-expect-assertions"             : 0,
+    "jest/valid-describe"                       : 2,
+    "jest/valid-expect"                         : 2,
+    "jest/valid-expect-in-promise"              : 2,
+
+    // import
+    "import/no-extraneous-dependencies": 0,
+    "import/no-cycle": "warn",
+    "import/prefer-default-export": 0,
+    "import/no-named-default": 0,
+    "import/no-webpack-loader-syntax": 0,
+    "import/named": 2,
+    "import/default": 2,
+    "import/export": 2,
+    "import/no-deprecated": 2,
+    "import/no-mutable-exports": 2,
+    "import/no-duplicates": 2,
+    "import/no-namespace": 0,
+    "import/newline-after-import": 2,
+    "import/order": [
+      2,
+      {
+        "newlines-between": `never`,
+        groups: [`builtin`, [`internal`, `external`], [`parent`, `sibling`], `index`]
+      }
+    ],
+
+    // promise
+    "promise/catch-or-return"                   : [2, { terminationMethod: [`catch`, `finally`] }],
+    "promise/always-return"                     : 2,
+    "promise/no-return-wrap"                    : 2,
+    "promise/param-names"                       : 2,
+    "promise/prefer-await-to-then"              : 2,
+    "promise/prefer-await-to-callbacks"         : 2,
+  }
+}