.eslintrc.json

{
  "parser": "babel-eslint",
  "env": {
    "browser": true,
    "commonjs": true,
    "es6": true,
    "node": true
  },
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "sourceType": "module"
  },
  "plugins": [
    "react"
  ],
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended"
  ],
  "rules": {
    "no-unused-vars": "warn",
    "no-console": "off",
    "no-case-declarations": "off",
    "no-template-curly-in-string": "warn",
    "block-scoped-var": "error",
    "no-empty-function": "error",
    "no-implicit-globals": "error",
    "no-multi-spaces": "error",
    "no-self-compare": "warn",
    "no-shadow": "warn",
    "no-shadow-restricted-names": "error",
    "no-undef-init": "error",
    "array-bracket-spacing": "error",
    "block-spacing": "error",
    "brace-style": "error",
    "camelcase": "error",
    "comma-dangle": "warn",
    "comma-spacing": "warn",
    "computed-property-spacing": "error",
    "func-call-spacing": "error",
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1,
        "ignoredNodes": [
          "JSXAttribute",
          "JSXSpreadAttribute"
        ]
      }
    ],
    "jsx-quotes": "error",
    "key-spacing": "warn",
    "keyword-spacing": "warn",
    "no-multiple-empty-lines": "warn",
    "no-tabs": "error",
    "no-trailing-spaces": "error",
    "no-whitespace-before-property": "error",
    "object-curly-newline": [
      "warn",
      {
        "ObjectExpression": {
          "minProperties": 1
        },
        "ObjectPattern": "never"
      }
    ],
    "object-curly-spacing": "warn",
    "object-property-newline": "warn",
    "operator-assignment": "warn",
    "operator-linebreak": ["warn", "after"],
    "quote-props": [
      "warn",
      "as-needed"
    ],
    "quotes": [
      "warn",
      "single"
    ],
    "semi": "error",
    "semi-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "space-in-parens": "error",
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error",
      {
        "words": true,
        "nonwords": false
      }
    ],
    "arrow-parens": "warn",
    "arrow-spacing": [
      "warn",
      {
        "before": true,
        "after": true
      }
    ],
    "no-duplicate-imports": "warn",
    "no-useless-computed-key": "warn",
    "no-useless-rename": "warn",
    "no-var": "error",
    "prefer-arrow-callback": "warn",
    "prefer-const": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "warn",
    "rest-spread-spacing": "error",
    "template-curly-spacing": "error",
    "react/no-unescaped-entities": "off",
    "react/prop-types": "off",
    "react/no-find-dom-node": "off",
    "react/boolean-prop-naming": "warn",
    "react/no-danger": "error",
    "react/no-typos": "warn",
    "react/jsx-indent": "error",
    "react/jsx-pascal-case": "error",
    "react/jsx-wrap-multilines": "warn",
    "react/no-deprecated": "off"
  }
}