.eslintrc.js

module.exports = {
  // https://eslint.org/docs/user-guide/configuring#using-configuration-files-1
  root: true,

  // https://eslint.org/docs/user-guide/configuring#specifying-environments
  env: {
    browser: true,
    node: true,
    jest: true
  },

  // https://eslint.org/docs/user-guide/configuring#specifying-parser
  parser: 'vue-eslint-parser',
  // https://vuejs.github.io/eslint-plugin-vue/user-guide/#faq
  parserOptions: {
    parser: '@typescript-eslint/parser',
    ecmaVersion: 2017,
    sourceType: 'module',
    project: './tsconfig.json'
  },

  // https://eslint.org/docs/user-guide/configuring#extending-configuration-files
  // order matters: from least important to most important in terms of overriding
  // Prettier + Vue: https://medium.com/@gogl.alex/how-to-properly-set-up-eslint-with-prettier-for-vue-or-nuxt-in-vscode-e42532099a9c
  extends: [
    'eslint:recommended',
    'plugin:@typescript-eslint/recommended',
    'plugin:vue/recommended',
    'prettier',
    'prettier/vue',
    'prettier/@typescript-eslint'
  ],

  // https://eslint.org/docs/user-guide/configuring#configuring-plugins
  plugins: ['vue', '@typescript-eslint'],

  rules: {
    "@typescript-eslint/no-empty-interface": 1,
    // https://github.com/typescript-eslint/typescript-eslint/issues/103
    "@typescript-eslint/no-parameter-properties": 0
  }
};