.eslintrc.json

{
  "root": true,
  "parserOptions": {
    "ecmaVersion": 9,
    "sourceType": "module"
  },
  "env": {
    "browser": false,
    "es6": true
  },
  "rules": {
    "array-bracket-spacing": ["error", "always"],
    "array-callback-return": "error",
    "block-spacing": ["error", "always"],
    "brace-style": ["error", "1tbs"],
    "capitalized-comments": ["error", "always", { "ignoreInlineComments": true }],
    "class-methods-use-this": "off",
    "comma-dangle": ["error", {
      "arrays": "always-multiline",
      "objects": "always-multiline",
      "functions": "ignore"
    }],
    "comma-spacing": ["error", {
      "after": true
    }],
    "comma-style": "error",
    "computed-property-spacing": ["error", "never"],
    "constructor-super": "error",
    "curly": ["error", "all"],
    "eol-last": "error",
    "generator-star-spacing": ["error", {
      "before": true,
      "after": true
    }],
    "key-spacing": ["error", {
      "beforeColon": false,
      "afterColon": true
    }],
    "indent": ["error", 4, {
      "SwitchCase": 1
    }],
    "init-declarations": "off",
    "new-parens": "error",
    "no-caller": "error",
    "no-case-declarations": "error",
    "no-dupe-class-members": "error",
    "no-duplicate-imports": "error",
    "no-else-return": "warn",
    "no-fallthrough": "warn",
    "no-implicit-globals": "error",
    "no-iterator": "error",
    "no-mixed-spaces-and-tabs": "error",
    "no-multi-spaces": "error",
    "no-multiple-empty-lines": "error",
    "no-new": "error",
    "no-new-symbol": "error",
    "no-new-wrappers": "error",
    "no-proto": "error",
    "no-redeclare": "error",
    "no-restricted-properties": "error",
    "no-tabs": "error",
    "no-template-curly-in-string": "error",
    "no-this-before-super": "error",
    "no-throw-literal": "error",
    "no-trailing-spaces": "error",
    "no-unused-expressions": "error",
    "no-unused-vars": "error",
    "no-useless-constructor": "error",
    "no-useless-return": "off",
    "no-var": "error",
    "no-void": "error",
    "no-warning-comments": "off",
    "no-with": "error",
    "prefer-const": ["error", {"destructuring": "all"}],
    "prefer-promise-reject-errors": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "sort-imports": "error",
    "spaced-comment": ["error", "always"],
    "unicode-bom": "error",
    "wrap-iife": "error",
    "yield-star-spacing": ["error", {
      "before": true,
      "after": true
    }],
    "yoda": ["error", "always"]
  }
}