.eslintrc.js

const { resolve } = require('path');
module.exports = {
  // https://eslint.org/docs/user-guide/configuring#configuration-cascading-and-hierarchy
  // This option interrupts the configuration hierarchy at this file
  // Remove this if you have an higher level ESLint config file (it usually happens into a monorepos)
  root: true,

  // https://eslint.vuejs.org/user-guide/#how-to-use-custom-parser
  // Must use parserOptions instead of "parser" to allow vue-eslint-parser to keep working
  // `parser: 'vue-eslint-parser'` is already included with any 'plugin:vue/**' config and should be omitted
  parserOptions: {
    // https://github.com/typescript-eslint/typescript-eslint/tree/master/packages/parser#configuration
    // https://github.com/TypeStrong/fork-ts-checker-webpack-plugin#eslint
    // Needed to make the parser take into account 'vue' files
    extraFileExtensions: ['.vue'],
    parser: '@typescript-eslint/parser',
    project: resolve(__dirname, './tsconfig.json'),
    tsconfigRootDir: __dirname,
    ecmaVersion: 2018, // Allows for the parsing of modern ECMAScript features
    sourceType: 'module', // Allows for the use of imports
  },

  env: {
    browser: true,
  },

  // Ref: https://www.npmjs.com/package/eslint-plugin-prettier-vue
  extends: ['plugin:vue/recommended', 'plugin:prettier-vue/recommended', 'prettier'],

  plugins: [
    // required to apply rules which need type information
    '@typescript-eslint',

    // https://eslint.vuejs.org/user-guide/#why-doesn-t-it-work-on-vue-file
    // required to lint *.vue files
    'vue',

    // https://github.com/typescript-eslint/typescript-eslint/issues/389#issuecomment-509292674
    // Prettier has not been included as plugin to avoid performance impact
    // add it as an extension for your IDE
    // 'prettier'
  ],

  globals: {
    ga: 'readonly', // Google Analytics
    cordova: 'readonly',
    __statics: 'readonly',
    __QUASAR_SSR__: 'readonly',
    __QUASAR_SSR_SERVER__: 'readonly',
    __QUASAR_SSR_CLIENT__: 'readonly',
    __QUASAR_SSR_PWA__: 'readonly',
    process: 'readonly',
    Capacitor: 'readonly',
    chrome: 'readonly',
  },

  settings: {
    'prettier-vue': {
      // Settings for how to process Vue SFC Blocks
      SFCBlocks: {
        /**
         * Use prettier to process `<template>` blocks or not
         *
         * If set to `false`, you may need to enable those vue rules that are disabled by `eslint-config-prettier`,
         * because you need them to lint `<template>` blocks
         *
         * @default true
         */
        template: true,

        /**
         * Use prettier to process `<script>` blocks or not
         *
         * If set to `false`, you may need to enable those rules that are disabled by `eslint-config-prettier`,
         * because you need them to lint `<script>` blocks
         *
         * @default true
         */
        script: true,

        /**
         * Use prettier to process `<style>` blocks or not
         *
         * @default true
         */
        style: true,

        // Settings for how to process custom blocks
        customBlocks: {
          // Treat the `<docs>` block as a `.markdown` file
          docs: { lang: 'markdown' },

          // Treat the `<config>` block as a `.json` file
          config: { lang: 'json' },

          // Treat the `<module>` block as a `.js` file
          module: { lang: 'js' },

          // Ignore `<comments>` block (omit it or set it to `false` to ignore the block)
          comments: false,

          // Other custom blocks that are not listed here will be ignored
        },
      },

      // Use prettierrc for prettier options or not (default: `true`)
      usePrettierrc: true,

      // Set the options for `prettier.getFileInfo`.
      // @see https://prettier.io/docs/en/api.html#prettiergetfileinfofilepath-options
      fileInfoOptions: {
        // Path to ignore file (default: `'.prettierignore'`)
        // Notice that the ignore file is only used for this plugin
        ignorePath: '.testignore',

        // Process the files in `node_modules` or not (default: `false`)
        withNodeModules: false,
      },
    },
  },

  // add your custom rules here
  rules: {
    'prefer-promise-reject-errors': 'off',
    'vue/no-v-model-argument': 'off',

    // TypeScript
    quotes: ['warn', 'single', { avoidEscape: true }],
    '@typescript-eslint/explicit-function-return-type': 'off',
    '@typescript-eslint/explicit-module-boundary-types': 'off',
    '@typescript-eslint/ban-ts-comment': 'off',
    '@typescript-eslint/no-explicit-any': 'off',
    '@typescript-eslint/no-var-requires': 'error',
    '@typescript-eslint/no-inferrable-types': 'off',

    // allow debugger during development only
    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off',

    'prettier-vue/prettier': [
      'error',
      {
        // Override all options of `prettier` here
        // @see https://prettier.io/docs/en/options.html
        printWidth: 100,
        singleQuote: true,
        semi: true,
        tabWidth: 2,
      },
    ],
  },
};