.eslintrc.js

module.exports = {
  root: true,
  env: {
    node: true,
  },
  extends: [
    'plugin:vue/vue3-strongly-recommended',
    'standard',
    'prettier',
    'plugin:prettier/recommended',
    'plugin:@typescript-eslint/recommended',
  ],
  plugins: ['prettier', '@typescript-eslint'],
  parser: 'vue-eslint-parser',
  parserOptions: {
    parser: '@typescript-eslint/parser',
    sourceType: 'module',
    extraFileExtensions: ['.vue'],
    ecmaVersion: 2020,
    ecmaFeatures: {
      jsx: true,
    },
    warnOnUnsupportedTypeScriptVersion: true,
  },
  rules: {
    // TypeScript's `noFallthroughCasesInSwitch` option is more robust (#6906)
    'default-case': 'off',
    // 'tsc' already handles this (https://github.com/typescript-eslint/typescript-eslint/issues/291)
    'no-dupe-class-members': 'off',
    // 'tsc' already handles this (https://github.com/typescript-eslint/typescript-eslint/issues/477)
    'no-undef': 'off',

    // Add TypeScript specific rules (and turn off ESLint equivalents)
    '@typescript-eslint/consistent-type-assertions': 'warn',
    'no-array-constructor': 'off',
    '@typescript-eslint/no-array-constructor': 'warn',
    '@typescript-eslint/no-namespace': 'error',
    'no-use-before-define': 'off',
    '@typescript-eslint/no-use-before-define': [
      'error',
      {
        functions: false,
        classes: false,
        variables: false,
        typedefs: false,
      },
    ],
    'no-unused-vars': 'off',
    '@typescript-eslint/no-unused-vars': [
      'error',
      {
        args: 'none',
        ignoreRestSiblings: true,
      },
    ],
    'no-useless-constructor': 'off',
    '@typescript-eslint/no-useless-constructor': 'warn',
    'prettier/prettier': 'error',
    'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
    'no-debugger': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/member-delimiter-style': 'off',
    '@typescript-eslint/no-explicit-any': 'off',
    'standard/no-callback-literal': 'off',
  },
  overrides: [
    {
      files: [
        '**/__tests__/*.{j,t}s?(x)',
        '**/tests/unit/**/*.spec.{j,t}s?(x)',
      ],
      env: {
        jest: true,
      },
    },
    {
      files: ['shims-tsx.d.ts'],
      rules: {
        '@typescript-eslint/no-empty-interface': 'off',
        '@typescript-eslint/no-explicit-any': 'off',
        '@typescript-eslint/no-unused-vars': 'off',
      },
    },
  ],
}