Common eslint config

.eslintrc

{
  "extends": [
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [".mjs", ".js", ".json"]
      }
    },
    "import/extensions": [
      ".js",
      ".mjs",
      ".jsx",
    ],
    "import/core-modules": [
    ],
    "import/ignore": [
      "node_modules",
      "\\.(coffee|scss|css|less|hbs|svg|json)$",
    ],
  },
  "env": {
    "es6": true,
    "node": true,
    "mocha": true
  },
  "parserOptions": {
    "ecmaVersion": 8
  },
  "rules": {
    "import/no-unresolved": ["error", { "commonjs": true, "caseSensitive": true }],
    "import/named": "error",
    "import/default": "off",
    "import/namespace": "off",
    "import/export": "error",
    "import/no-named-as-default": "error",
    "import/no-named-as-default-member": "error",
    "import/no-deprecated": "off",
    "import/no-extraneous-dependencies": ["error", {
      "devDependencies": [
        "test/**",
        "tests/**",
        "spec/**",
        "Gruntfile-beta.js",
        "**/__tests__/**",
        "test.{js,jsx}",
        "test-*.{js,jsx}",
        "**/*.{test,spec}.{js,jsx}",
        "**/jest.config.js",
        "**/webpack.config.js",
        "**/webpack.config.*.js",
        "**/rollup.config.js",
        "**/rollup.config.*.js",
        "**/gulpfile.js",
        "**/gulpfile.*.js",
        "**/Gruntfile{,.js}",
        "**/protractor.conf.js",
        "**/protractor.conf.*.js",
      ],
      "optionalDependencies": false,
    }],
    "import/no-mutable-exports": "error",

    "import/no-commonjs": "off",
    "import/no-amd": "error",
    "import/no-nodejs-modules": "off",

    "import/first": ["error", "absolute-first"],
    "import/imports-first": "off",
    "import/no-duplicates": "error",
    "import/no-namespace": "off",
    "import/extensions": ["error", "always", {
          "js": "never",
          "mjs": "never",
          "jsx": "never",
        }],
    "import/order": ["off", {
      "groups": ["builtin", "external", "internal", "parent", "sibling", "index"],
      "newlines-between": "never",
    }],
    "import/prefer-default-export": "error",
    "import/no-restricted-paths": "off",
    "import/max-dependencies": ["off", { "max": 10 }],
    "import/no-absolute-path": "error",
    "import/no-dynamic-require": "off",
    "import/no-internal-modules": ["off", {
      "allow": [],
    }],
    "import/unambiguous": "off",
    "import/no-webpack-loader-syntax": "error",
    "import/no-unassigned-import": "off",
    "import/no-named-default": "error",
    "import/no-anonymous-default-export": ["off", {
      "allowArray": false,
      "allowArrowFunction": false,
      "allowAnonymousClass": false,
      "allowAnonymousFunction": false,
      "allowLiteral": false,
      "allowObject": false,
    }],
    "import/exports-last": "off",
    "import/group-exports": "off",
    "import/no-default-export": "off",
    "import/no-self-import": "off",
    "accessor-pairs": 2,
    "arrow-spacing": 2,
    "block-scoped-var": 2,
    "block-spacing": [
      2,
      "always"
    ],
    "brace-style": [
      2,
      "1tbs",
      {
        "allowSingleLine": false
      }
    ],
    "camelcase": 0,
    "comma-dangle": ["error", {
      "arrays": "always-multiline",
      "objects": "always-multiline",
      "imports": "never",
      "exports": "never",
      "functions": "ignore"
    }],
    "comma-spacing": [
      2,
      {
        "after": true,
        "before": false
      }
    ],
    "comma-style": [
      2,
      "last"
    ],
    "consistent-this": [
      2,
      "self"
    ],
    "constructor-super": 2,
    "curly": 2,
    "default-case": 2,
    "dot-location": [
      2,
      "property"
    ],
    "dot-notation": 2,
    "eol-last": 2,
    "eqeqeq": [
      2,
      "smart"
    ],
    "generator-star-spacing": ["error", {
        "before": false,
        "after": true,
        "anonymous": {"before": false, "after": true},
        "method": {"before": true, "after": true}
    }],
    "global-require": 0,
    "handle-callback-err": 1,
    "indent": [
      2,
      2,
      {
        "SwitchCase": 1
      }
    ],
    "key-spacing": [
      2,
      {
        "afterColon": true,
        "beforeColon": false
      }
    ],
    "keyword-spacing": [
      "error",
      {
        "after": true,
        "before": false,
        "overrides": {
          "else": { "before": true },
          "catch": { "before": true }
        }
      }
    ],
    "new-cap": 2,
    "new-parens": 2,
    "no-alert": 1,
    "no-array-constructor": 2,
    "no-bitwise": 2,
    "no-caller": 2,
    "no-case-declarations": 0,
    "no-catch-shadow": 2,
    "no-class-assign": 2,
    "no-console": 1,
    "no-const-assign": 2,
    "no-constant-condition": 2,
    "no-continue": 2,
    "no-control-regex": 2,
    "no-debugger": 1,
    "no-delete-var": 2,
    "no-div-regex": 1,
    "no-dupe-class-members": 2,
    "no-dupe-keys": 2,
    "no-duplicate-case": 2,
    "no-else-return": 2,
    "no-empty": 2,
    "no-empty-character-class": 2,
    "no-eval": 2,
    "no-extend-native": 2,
    "no-extra-bind": 2,
    "no-extra-boolean-cast": 2,
    "no-extra-semi": 2,
    "no-fallthrough": 2,
    "no-floating-decimal": 2,
    "no-func-assign": 2,
    "no-implied-eval": 2,
    "no-inner-declarations": 2,
    "no-invalid-regexp": 2,
    "no-irregular-whitespace": 2,
    "no-iterator": 2,
    "no-labels": 2,
    "no-lone-blocks": 2,
    "no-lonely-if": 2,
    "no-loop-func": 2,
    "no-mixed-spaces-and-tabs": 2,
    "no-multi-spaces": 2,
    "no-multi-str": 2,
    "no-multiple-empty-lines": [
      2,
      {
        "max": 2,
        "maxEOF": 1
      }
    ],
    "no-native-reassign": 2,
    "no-negated-in-lhs": 2,
    "no-nested-ternary": 2,
    "no-new": 2,
    "no-new-func": 2,
    "no-new-object": 2,
    "no-new-require": 2,
    "no-new-wrappers": 2,
    "no-octal": 2,
    "no-octal-escape": 2,
    "no-param-reassign": 2,
    "no-proto": 2,
    "no-redeclare": 2,
    "no-return-assign": 2,
    "no-self-compare": 2,
    "no-shadow": 2,
    "no-shadow-restricted-names": 2,
    "no-spaced-func": 2,
    "no-this-before-super": 2,
    "no-throw-literal": 2,
    "no-trailing-spaces": [
      2,
      {
        "skipBlankLines": true
      }
    ],
    "no-undef": "error",
    "no-undef-init": 2,
    "no-unneeded-ternary": 2,
    "no-unreachable": 2,
    "no-unused-expressions": [
      2,
      {
        "allowShortCircuit": true
      }
    ],
    "no-unused-vars": 2,
    "no-use-before-define": 2,
    "no-useless-call": 2,
    "no-useless-concat": 2,
    "no-var": 2,
    "no-void": 2,
    "no-warning-comments": 1,
    "no-with": 2,
    "object-curly-spacing": [
      2,
      "always"
    ],
    "prefer-arrow-callback": 0,
    "prefer-spread": 1,
    "prefer-template": 1,
    "quotes": [
      2,
      "single",
      "avoid-escape"
    ],
    "radix": [
      2,
      "as-needed"
    ],
    "require-yield": 2,
    "semi": [
      2,
      "always"
    ],
    "space-before-blocks": [
      2,
      "always"
    ],
    "space-before-function-paren": [
      2,
      {
        "anonymous": "always",
        "named": "never"
      }
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-infix-ops": 2,
    "space-unary-ops": [
      2,
      {
        "nonwords": false,
        "words": true
      }
    ],
    "spaced-comment": [
      2,
      "always"
    ],
    "use-isnan": 2,
    "valid-typeof": 2,
    "vars-on-top": 2,
    "wrap-iife": [
      2,
      "inside"
    ],
    "yoda": 2
  }
}