.eslintrc.js

module.exports = {
  extends: ['airbnb-base'],
  parser: 'babel-eslint',
  parserOptions: {
    ecmaVersion: 2020,
    ecmaFeatures: {
      impliedStrict: true,
      classes: true,
    },
  },
  env: {
    browser: true,
    node: true,
    jquery: true,
    jest: true,
  },
  overrides: [
    {
      files: ['**/*.svelte'],
      processor: 'svelte3/svelte3',
      rules: {
        'import/no-duplicates': 'off',
        'import/no-mutable-exports': 'off',
      }
    }
  ],
  rules: {
    'no-debugger': 0,
    'no-alert': 0,
    'no-await-in-loop': 0,
    'no-return-assign': ['error', 'except-parens'],
    'no-restricted-syntax': [
      2,
      'ForInStatement',
      'LabeledStatement',
      'WithStatement',
    ],
    'no-unused-vars': [
      1,
      {
        ignoreRestSiblings: true,
        argsIgnorePattern: 'res|next|^err',
      },
    ],
    'prefer-const': [
      'error',
      {
        destructuring: 'all',
      },
    ],
    'arrow-body-style': [2, 'as-needed'],
    'no-unused-expressions': [
      2,
      {
        allowTaggedTemplates: true,
      },
    ],
    'no-param-reassign': [
      2,
      {
        props: false,
      },
    ],
    'no-console': 0,
    'import/prefer-default-export': 0,
    import: 0,
    'func-names': 0,
    'space-before-function-paren': 0,
    'comma-dangle': 0,
    'max-len': 0,
    'import/extensions': 0,
    'no-underscore-dangle': 0,
    'consistent-return': 0,
    radix: 0,
    'no-shadow': [
      2,
      {
        hoist: 'all',
        allow: ['resolve', 'reject', 'done', 'next', 'err', 'error'],
      },
    ],
    quotes: [
      2,
      'single',
      {
        avoidEscape: true,
        allowTemplateLiterals: true,
      },
    ],

  },
  plugins: ['html', 'svelte3'],
};