.eslintrc.js

const { resolve } = require('path');
module.exports = {
  root: true,
  env: {
    browser: true,
    node: true,
  },
  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
  },
  settings: {
    'import/resolver': {
      node: {
        paths: ['src'],
        extensions: ['.js', '.jsx', '.ts', '.tsx'],
      },
    },
  },
  extends: [
    'plugin:@typescript-eslint/recommended',
    'plugin:vue/base',
    'airbnb-base',
    'prettier',
    'prettier/vue',
    'plugin:prettier/recommended',
  ],
  plugins: ['@typescript-eslint', 'prettier', 'vue'],
  // add your custom rules here
  rules: {
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
    'prettier/prettier': ['error'],
    'no-console': 'off',
    'no-underscore-dangle': 'off',
    'import/prefer-default-export': 'off',
    'func-names': 'off',
    'no-shadow': ['error', { allow: ['state'] }],
    'no-param-reassign': [
      'error',
      {
        props: true,
        ignorePropertyModificationsFor: [
          // All properties except state are in the ignorePropertyModificationsFor array by default.
          'state',
          'acc',
          'e',
          'ctx',
          'req',
          'request',
          'res',
          'response',
          '$scope',
        ],
      },
    ],
  },
};