.eslintrc.js

module.exports = {
  root: true,

  env: {
    node: true,
  },

  extends: [
    'plugin:vue/essential',
    '@vue/airbnb',
    '@vue/typescript',
  ],

  rules: {
    'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',
    'class-methods-use-this': 'warn',
    'no-use-before-define': ['error', { functions: false }],
    'no-param-reassign': ['error', { props: false }],
    'arrow-parens': ['error', 'as-needed'],
  },

  parserOptions: {
    parser: '@typescript-eslint/parser',
  },

  overrides: [
    {
      files: [
        '**/__tests__/*.{j,t}s?(x)',
        '**/tests/unit/**/*.spec.{j,t}s?(x)',
      ],
      env: {
        jest: true,
      },
    },
    {
      files: ['**/*.ts', '**/*.vue'],
      rules: {
        'no-unused-vars': 'off',
        '@typescript-eslint/no-unused-vars': ['error'],
      },
    },
  ],
};