.eslintrc.json

{
  "extends": "eslint:recommended",

  "rules": {
    "strict": ["off", "global"],
    "indent": ["warn", 2, {
      "VariableDeclarator": {"var": 2, "let": 2, "const": 3},
      "SwitchCase": 1
    }],
    "semi": ["error", "always", {
      "omitLastInOneLineBlock": true
    }],
    "keyword-spacing": ["error", {
      "before": true,
      "after": false,
      "overrides": {
        "else": {
          "after": true
        },
        "import": {
          "after": true
        },
        "export": {
          "after": true
        },
        "from": {
          "after": true
        },
        "try": {
          "after": true
        },
        "const": {
          "after": true
        },
        "case": {
          "after": true
        },
        "return": {
          "after": true
        }
      }
    }],
    "no-unused-vars": "off",
    "quotes": ["error", "backtick"],
    "no-console": ["warn", {
      "allow": ["warn", "error"]
    }],
    "no-var": "error",
    "object-shorthand": "error",
    "prefer-const": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "error"
  },
  "env": {
    "browser": true,
    "es6": true,
    "commonjs": true,
    "node": true
  },
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "impliedStrict": true
  }
}