.eslintrc.js

module.exports = {
  root: true,

  env: {
    node: true,
  },

  parserOptions: {
    ecmaVersion : 2020,
    parser      : '@typescript-eslint/parser',
  },

  rules: {
    indent                           : [ 'error', 2 ],
    'linebreak-style'                : [ 'error', 'unix' ],
    quotes                           : [ 'error', 'single' ],
    semi                             : [ 'error', 'never' ],
    'comma-dangle'                   : [ 'error', 'always-multiline' ],
    'no-var'                         : [ 'error' ],
    'no-multi-spaces'                : [ 'error', { exceptions: { ArrayExpression: true, Property: true, TSPropertySignature: true }, ignoreEOLComments: true } ],
    'array-bracket-spacing'          : [ 'error', 'always' ],
    'key-spacing'                    : [ 'error', { align: { beforeColon: true, afterColon: true, mode: 'minimum', on: 'colon' } } ],
    'vue/multi-word-component-names' : 'off',
    'operator-linebreak'             : [ 'error', 'before' ],
    'no-console'                     : [ (process.env.NODE_ENV === 'production' ? 'error' : 'warn'), { allow: [ 'warn', 'error' ] } ],
    'no-debugger'                    : process.env.NODE_ENV === 'production' ? 'error' : 'warn',
    'yoda'                           : 'off',
  },

  extends: [
    'plugin:vue/essential',
    '@vue/standard',
    '@vue/typescript/recommended',
    '@vue/typescript',
  ],
}