An opinionated ESLint configuration.

.eslintrc

{
  "extends": "airbnb",
  "rules": {
    "import/no-named-as-default": 0,
    "import/no-named-as-default-member": 0,

    // allow files to have extension ".js"
    "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],

    // allow ommitted parentheses in single-argument arrow functions
    "arrow-parens": [2, "as-needed"],

    // allow <Link> components to act as anchors
    "jsx-a11y/anchor-is-valid": [ "error", {
      "components": [ "Link" ],
      "specialLink": [ "to" ],
      "aspects": [ "noHref", "invalidHref", "preferButton" ]
    }]
  },

  // environments define allowed global variables
  "env": {
    "browser": true
  }
}

mhkeller:

{
  "env": {
    "browser": true,
    "es6": true,
    "node": true
  },
  "extends": "airbnb-base",
  "rules": {
    "no-tabs": 0,
    "indent": [2, "tab", { "SwitchCase": 1, "VariableDeclarator": 1 }],
    "arrow-body-style": 0,
    "comma-dangle": 0,
    "import/extensions": 0,
    "arrow-parens": [2, "as-needed"],
    "import/no-mutable-exports": 0,
    "import/prefer-default-export": 0,
    "import/first": 0,
    "object-curly-newline": ["error", { "consistent": true }],
    "quotes": ["error", "single", { "allowTemplateLiterals": true }],
    "import/no-extraneous-dependencies": ["error", {"devDependencies": true}],
    "camelcase": 0,
    "max-len": 0,
    "one-var": 0,
    "one-var-declaration-per-line": 0,
    "no-param-reassign": 0,
    "prefer-destructuring": 0,
    "no-multi-assign": 0,
    "eol-last": 0,
    "no-await-in-loop": 0
  }
}