.eslintrc.js

module.exports = {
  env: {
    browser: true,
    es2021: true,
  },
  parserOptions: {
    ecmaVersion: 12,
    sourceType: 'module',
  },
  rules: {
    semi: ['error', 'always'],
    indent: ['error', 2],
    'no-irregular-whitespace': ['error', {
      skipStrings: true,
      skipComments: true,
      skipRegExps: true,
      skipTemplates: true,
    }],
    'multiline-comment-style': ['error', 'starred-block'],
    'object-property-newline': ['error', {
      allowAllPropertiesOnSameLine: false,
      allowMultiplePropertiesPerLine: false,
    }],
    'object-curly-newline': ['error', {
      minProperties: 2,
      multiline: true,
    }],
    'no-multiple-empty-lines': ['error', {
      max: 1,
      maxEOF: 0,
    }],
    'no-param-reassign': 'off',
    'no-underscore-dangle': 'off',
    'class-methods-use-this': 'off',
    'max-len': [2, {
      code: 1000,
      ignorePattern: '^import .*',
    }],
    'linebreak-style': ['error', process.platform === 'win32' ? 'windows' : 'unix'],
    'space-infix-ops': ['error', { int32Hint: false }],
    'space-before-function-paren': ['error', {
      anonymous: 'always',
      named: 'always',
      asyncArrow: 'always',
    }],
    'keyword-spacing': ['error', {
      before: true,
      after: true,
    }],
    'object-curly-spacing': ['error', 'always'],
    quotes: ['error', 'single', { allowTemplateLiterals: true }],
  },
};