.eslintrc.js

// http://eslint.org/docs/user-guide/configuring

module.exports = {
  root: true,
  parserOptions: {
    sourceType: "module",
  },
  env: {
    node: true,
    mocha: true,
  },
  extends: "airbnb-base",
  // add your custom rules here
  rules: {
    // don't require .vue extension when importing
    "import/extensions": [
      "error",
      "always",
      {
        js: "never",
      },
    ],
    // allow optionalDependencies
    "import/no-extraneous-dependencies": [
      "error",
      {
        optionalDependencies: ["test/unit/index.js"],
      },
    ],
    // allow debugger during development
    "no-debugger": process.env.NODE_ENV === "production" ? 2 : 0,
    "no-param-reassign": 0,
    "no-console": process.env.NODE_ENV === "production" ? 2 : 0,
    "implicit-arrow-linebreak": 0,
    "no-unused-vars": ["error", { argsIgnorePattern: "next" }],
  },
};