.eslintrc.json

{
  "env": {
    "browser": true,
    "es2020": true,
    "jest/globals": true,
    "node": true
  },
  "extends": ["eslint:recommended", "plugin:jest/recommended"],
  "globals": {
    "jQuery": true,
    "$": true
  },
  "parserOptions": {
    "ecmaVersion": 2020
  },
  "rules": {
    "brace-style": ["error", "1tbs"],
    "camelcase": "error",
    "comma-spacing": ["error", {
      "before": false,
      "after": true
    }],
    "consistent-return": "error",
    "curly": ["error", "all"],
    "indent": ["error", 2],
    "keyword-spacing": ["error", {
      "before": true,
      "after": true
    }],
    "linebreak-style": ["error", "unix"],
    "max-len": ["error", {
      "code": 80,
      "ignoreComments": true,
      "ignoreRegExpLiterals": true,
      "ignoreStrings": true
    }],
    "quotes": ["error", "single", {
      "avoidEscape": true
    }],
    "semi": ["error", "always"],
    "space-infix-ops": "error"
  }
}