.eslintrc.js

module.exports = {
  extends: [
    'airbnb-base',
    // 'plugin:jsdoc/recommended',
    'plugin:lit/recommended',
  ],
  settings: {
    jsdoc: {
      mode: 'typescript',
    },
  },
  env: {
    browser: true,
    es2020: true,
  },
  parserOptions: {
    ecmaVersion: 2020,
    sourceType: 'module',
  },
  rules: {
    'import/extensions': ['error', 'ignorePackages'],
    indent: ['error', 2, {
      SwitchCase: 1,
      VariableDeclarator: 1,
      outerIIFEBody: 1,
      // MemberExpression: null,
      FunctionDeclaration: {
        parameters: 1,
        body: 1,
      },
      FunctionExpression: {
        parameters: 1,
        body: 1,
      },
      CallExpression: {
        arguments: 1,
      },
      ArrayExpression: 1,
      ObjectExpression: 1,
      ImportDeclaration: 1,
      flatTernaryExpressions: false,
      ignoredNodes: [
        'JSXElement',
        'JSXElement > *',
        'JSXAttribute',
        'JSXIdentifier',
        'JSXNamespacedName',
        'JSXMemberExpression',
        'JSXSpreadAttribute',
        'JSXExpressionContainer',
        'JSXOpeningElement',
        'JSXClosingElement',
        'JSXFragment',
        'JSXOpeningFragment',
        'JSXClosingFragment',
        'JSXText',
        'JSXEmptyExpression',
        'JSXSpreadChild',
        'TemplateLiteral *',
      ],
      ignoreComments: false,
    }],
    'no-underscore-dangle': ['error', {
      allow: ['_id'],
      allowAfterThis: false,
      allowAfterSuper: false,
      enforceInMethodNames: true,
    }],
    'no-unused-vars': ['error', {
      vars: 'all',
      args: 'after-used',
      ignoreRestSiblings: true,
      argsIgnorePattern: '^_',
    }],
    'object-property-newline': ['error', {
      allowAllPropertiesOnSameLine: false,
    }],
  },
};