.eslintrc.js

module.exports = {
  env: { browser: true, es6: true, node: true, es2020: true },
  extends: 'eslint:recommended',
  parserOptions: {
    ecmaVersion: 2020,
    sourceType: 'module',
  },
  rules: {
    strict: 0,
    'no-param-reassign': 2,
    'no-undef': 2,
    'accessor-pairs': 2,
    'comma-dangle': [2, 'always-multiline'],
    'consistent-return': 2,
    'dot-notation': 2,
    eqeqeq: 2,
    indent: [2, 2, { SwitchCase: 1 }],
    'no-cond-assign': 2,
    'no-constant-condition': 2,
    'no-eval': 2,
    'no-inner-declarations': [0],
    'no-unneeded-ternary': 2,
    radix: 2,
    semi: [2, 'always'],
    'comma-spacing': 2,
    'comma-style': 2,
    'eol-last': 2,
    'linebreak-style': [2, 'unix'],
    'new-parens': 2,
    'no-lonely-if': 2,
    'no-multiple-empty-lines': 2,
    'no-nested-ternary': 2,
    'no-spaced-func': 2,
    'no-trailing-spaces': 2,
    'operator-linebreak': 2,
    quotes: [2, 'single'],
    'semi-spacing': 2,
    'space-unary-ops': 2,
    'arrow-parens': 2,
    'arrow-spacing': 2,
    'no-class-assign': 2,
    'no-dupe-class-members': 2,
    'no-var': 2,
    'object-shorthand': 0,
    'prefer-const': 2,
    'prefer-spread': 2,
    'prefer-template': 2,
  },
};