.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2020: true,
    node: true
  },

  extends: [
    "plugin:vue/recommended",
    "airbnb-base",
    "plugin:prettier/recommended"
  ],

  parserOptions: {
    ecmaVersion: 6,
    sourceType: "module",
    parser: "@babel/eslint-parser"
  },

  plugins: ["vue", "prettier"],

  rules: {
    "prettier/prettier": ["error", { trailingComma: "none" }],
    "no-unexpected-multiline": "error",
    "no-param-reassign": 1,
    eqeqeq: "error",
    "max-len": ["error", { code: 140, ignoreUrls: true }],
    "comma-dangle": ["error", "never"],
    quotes: ["error", "double", { allowTemplateLiterals: true }],
    "import/no-extraneous-dependencies": "warn",
    "consistent-return": "warn",
    "no-plusplus": 0,
    "no-underscore-dangle": 0,
    "no-restricted-syntax": "warn",
    "no-continue": "warn",
    "no-console": process.env.NODE_ENV === "production" ? "warn" : "off",
    "no-debugger": process.env.NODE_ENV === "production" ? "warn" : "off"
  },

  root: true,

  overrides: [
    {
      files: [
        "**/__tests__/*.{j,t}s?(x)",
        "**/tests/unit/**/*.spec.{j,t}s?(x)"
      ],
      env: {
        jest: true
      }
    }
  ]
};