.eslintrc.json

{
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 6
  },
  "env": {
    "browser": true
  },
  "rules": {
    "curly": [
      "error",
      "all"
    ],
    "eqeqeq": [
      "error",
      "allow-null"
    ],
    "no-alert": "error",
    "no-caller": "error",
    "no-console": "off",
    "no-empty-function": "error",
    "no-eval": "error",
    "no-multi-spaces": "error",
    "no-multi-str": "error",
    "no-global-assign": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-return-assign": "error",
    "no-script-url": "error",
    "no-sequences": "error",
    "no-unused-expressions": "error",
    "no-with": "error",
    "yoda": "error",
    "array-bracket-spacing": [
      "error",
      "never"
    ],
    "brace-style": [
      "error",
      "1tbs"
    ],
    "no-shadow": "error",
    "no-shadow-restricted-names": "error",
    "no-undef-init": "error",
    "camelcase": "error",
    "comma-spacing": "error",
    "eol-last": "error",
    "quotes": [
      "error",
      "single",
      {
        "avoidEscape": true,
        "allowTemplateLiterals": true
      }
    ],
    "indent": [
      "error",
      4,
      {
        "SwitchCase": 1
      }
    ],
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "keyword-spacing": "error",
    "new-cap": "error",
    "new-parens": "error",
    "no-array-constructor": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 2
      }
    ],
    "no-new-object": "error",
    "func-call-spacing": [
      "error",
      "never"
    ],
    "no-trailing-spaces": "error",
    "semi": [
      "error",
      "always"
    ],
    "semi-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "space-before-blocks": [
      "error",
      "always"
    ],
    "space-before-function-paren": [
      "error",
      {
        "anonymous": "always",
        "named": "never"
      }
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-infix-ops": "error"
  }
}