ESLint configuration

.eslintrc.json

{
  "env": {
    "browser": true,
    "node": true,
    "es6": true,
    "amd": true,
    "jest/globals": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 7,
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true,
      "jsx": true
    },
    "sourceType": "module"
  },
  "plugins": ["react", "jest"],
  "rules": {
    "react/jsx-uses-vars": ["error"],
    "eol-last": ["error", "always"],
    "key-spacing": ["error", { "beforeColon": false }],
    "comma-spacing": ["error", { "before": false, "after": true }],
    "react/jsx-curly-spacing": ["warn", { "when": "always", "children": true }],
    "space-infix-ops": ["error"],
    "indent": [
      "error", 2,
      { "SwitchCase": 1 }
    ],
    "space-before-function-paren": ["error", "always"],
    "linebreak-style": ["error", "unix"],
    "quotes": ["error", "single"],
    "semi": ["error", "never"]
  }
}