.eslintrc.json

{
  "root": true,
  "env": {
    "browser": true,
    "es6": true,
    "jquery": true
  },
  "parserOptions": {
    "ecmaVersion": 11,
    "sourceType": "script",
    "ecmaFeatures": {
      "impliedStrict": true
    }
  },
  "extends": [
    "eslint:recommended"
  ],
  "rules": {
    "arrow-body-style": "error",
    "array-bracket-newline": [
      "error",
      "consistent"
    ],
    "array-bracket-spacing": "error",
    "array-callback-return": "warn",
    "array-element-newline": [
      "error",
      "consistent"
    ],
    "arrow-parens": [
      "error",
      "as-needed"
    ],
    "arrow-spacing": "error",
    "block-scoped-var": "warn",
    "block-spacing": "error",
    "brace-style": [
      "error",
      "allman",
      {
        "allowSingleLine": true
      }
    ],
    "comma-dangle": [
      "error",
      "always-multiline"
    ],
    "comma-spacing": "error",
    "comma-style": "error",
    "computed-property-spacing": "error",
    "consistent-return": "warn",
    "curly": "error",
    "default-case-last": "error",
    "default-param-last": [
      "error"
    ],
    "dot-location": [
      "error",
      "property"
    ],
    "dot-notation": "error",
    "eol-last": [
      "error",
      "never"
    ],
    "eqeqeq": [
      "error",
      "smart"
    ],
    "func-call-spacing": [
      "error"
    ],
    "func-style": [
      "error",
      "expression",
      {
        "allowArrowFunctions": true
      }
    ],
    "function-call-argument-newline": [
      "error",
      "consistent"
    ],
    "function-paren-newline": [
      "error",
      "consistent"
    ],
    "generator-star-spacing": "error",
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "key-spacing": "error",
    "keyword-spacing": [
      "error"
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "lines-between-class-members": [
      "error"
    ],
    // "naming-convention": [
    //   "error",
    //   {
    //     "selector": "default",
    //     "format": [
    //       "camelCase"
    //     ]
    //   },
    //   {
    //     "selector": "variable",
    //     "modifiers": [
    //       "const"
    //     ],
    //     "format": [
    //       "camelCase",
    //       "PascalCase",
    //       "UPPER_CASE"
    //     ]
    //   },
    //   {
    //     "selector": "typeLike",
    //     "format": [
    //       "PascalCase"
    //     ]
    //   },
    //   {
    //     "selector": "memberLike",
    //     "modifiers": [
    //       "private"
    //     ],
    //     "format": [
    //       "camelCase"
    //     ],
    //     "leadingUnderscore": "require"
    //   }
    // ],
    "new-parens": "error",
    "no-dupe-class-members": [
      "error"
    ],
    "no-duplicate-imports": "error",
    "no-console": "warn",
    "no-else-return": "warn",
    "no-empty": "error",
    "no-empty-function": [
      "error"
    ],
    "no-eval": "error",
    "no-eq-null": "warn",
    "no-explicit-any": "off",
    "no-extra-bind": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-label": "error",
    // "no-extra-parens": "off",
    "no-extra-semi": [
      "error"
    ],
    "no-global-assign": "error",
    "no-implicit-coercion": "error",
    "no-implicit-globals": "error",
    "no-implied-eval": "error",
    "no-invalid-this": [
      "error"
    ],
    "no-lone-blocks": "error",
    "no-lonely-if": "warn",
    "no-loop-func": [
      "error"
    ],
    "no-loss-of-precision": [
      "error"
    ],
    // "no-magic-numbers": [
    //   "warn"
    // ],
    "no-mixed-operators": "error",
    "no-multi-spaces": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 1,
        "maxEOF": 0
      }
    ],
    // "no-negated-condition": "warn",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-object": "error",
    "no-new-wrappers": "error",
    "no-octal-escape": "error",
    "no-param-reassign": "warn",
    "no-promise-executor-return": "error",
    "no-prototype-builtins": "warn",
    "no-redeclare": [
      "error"
    ],
    "no-return-assign": "error",
    "no-return-await": "error",
    "no-self-compare": "error",
    "no-shadow": [
      "warn"
    ],
    "no-tabs": "error",
    "no-template-curly-in-string": "warn",
    "no-throw-literal": "error",
    "no-trailing-spaces": "error",
    "no-unneeded-ternary": "error",
    "no-unused-expressions": [
      "error",
      {
        "allowShortCircuit": true,
        "allowTernary": true
      }
    ],
    "no-unused-private-class-members": "error",
    "no-unused-vars": [
      "warn"
    ],
    "no-use-before-define": [
      "error"
    ],
    "no-useless-call": "error",
    "no-useless-computed-key": "error",
    "no-useless-concat": "error",
    "no-useless-constructor": [
      "error"
    ],
    "no-useless-rename": "error",
    "no-useless-return": "warn",
    "no-var": "warn",
    "no-void": "error",
    "no-whitespace-before-property": "error",
    "nonblock-statement-body-position": "error",
    "object-curly-newline": [
      "error",
      {
        "consistent": true
      }
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "operator-assignment": "error",
    "operator-linebreak": [
      "error",
      "before",
      {
        "overrides": {
          "=": "ignore"
        }
      }
    ],
    "padded-blocks": [
      "error",
      "never",
      {
        "allowSingleLineBlocks": true
      }
    ],
    "padding-line-between-statements": [
      "error",
      {
        "blankLine": "always",
        "prev": "directive",
        "next": "*"
      },
      {
        "blankLine": "never",
        "prev": "directive",
        "next": "directive"
      },
      {
        "blankLine": "always",
        "prev": "import",
        "next": "*"
      },
      {
        "blankLine": "never",
        "prev": "import",
        "next": "import"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "block",
          "block-like"
        ]
      },
      {
        "blankLine": "always",
        "prev": [
          "block",
          "block-like"
        ],
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": [
          "case",
          "default"
        ],
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": "*",
        "next": [
          "throw",
          "empty",
          "continue",
          "break",
          "return"
        ]
      }
    ],
    "prefer-arrow-callback": "error",
    "prefer-const": "warn",
    "prefer-destructuring": "warn",
    "prefer-exponentiation-operator": "error",
    "prefer-numeric-literals": "warn",
    "prefer-object-spread": "error",
    "prefer-promise-reject-errors": "warn",
    "prefer-regex-literals": "error",
    "prefer-rest-params": "warn",
    "prefer-spread": "warn",
    "prefer-template": "error",
    "quote-props": [
      "error",
      "as-needed"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "radix": [
      "error",
      "as-needed"
    ],
    "require-await": "error",
    "require-unicode-regexp": "error",
    "rest-spread-spacing": [
      "error",
      "never"
    ],
    "semi": [
      "error"
    ],
    "semi-spacing": "error",
    "semi-style": "error",
    // "sort-imports": "error", // use Organize Imports [Shift+Alt+O] instead
    "space-before-blocks": [
      "error"
    ],
    "space-before-function-paren": [
      "error"
    ],
    "space-in-parens": "error",
    "space-infix-ops": [
      "error"
    ],
    "space-unary-ops": "error",
    "spaced-comment": "error",
    "strict": "error",
    "switch-colon-spacing": "error",
    "template-curly-spacing": "error",
    "template-tag-spacing": [
      "error",
      "always"
    ],
    "wrap-iife": "error",
    "yield-star-spacing": "error",
    "yoda": [
      "error",
      "never",
      {
        "onlyEquality": true
      }
    ]
  }
}