.eslintrc.js

module.exports = {
  root: true,
  env: {
    node: true,
  },
  plugins: ['eslint-plugin-prettier'],
  extends: [
    'plugin:vue/essential',
    'eslint:recommended',
    '@vue/standard',
    '@vue/prettier',
    '@vue/typescript/recommended',
  ],
  parserOptions: {
    ecmaVersion: 2020,
  },
  rules: {
    'no-console': [process.env.NODE_ENV === 'production' ? 'error' : 'warn', { allow: ['warn', 'error', 'info'] }],
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
    'vue/html-closing-bracket-newline': [
      'error',
      {
        singleline: 'never',
        multiline: 'always',
      },
    ],
    'vue/html-indent': ['warn', 2],
    '@typescript-eslint/explicit-function-return-type': ['off'],
    '@typescript-eslint/no-explicit-any': ['off'],
    '@typescript-eslint/no-use-before-define': ['off'],
    '@typescript-eslint/no-unused-vars': ['off'],
    '@typescript-eslint/no-empty-function': ['off'],
    '@typescript-eslint/no-var-requires': ['off'],
  },
  overrides: [
    {
      files: ['**/__tests__/*.{j,t}s?(x)', '**/tests/unit/**/*.spec.{j,t}s?(x)'],
      env: {
        jest: true,
      },
    },
    // https://github.com/typescript-eslint/typescript-eslint/blob/master/docs/getting-started/linting/FAQ.md#i-get-errors-from-the-no-undef-rule-about-global-variables-not-being-defined-even-though-there-are-no-typescript-errors
    {
      files: ['*.vue'],
      rules: {
        'no-undef': 'off',
      },
    },
  ],
};