eslint-plugin-cup

2.0.4 verified Sat Apr 25 auth: no javascript maintenance

ESLint plugin for create-universal-package (cup), providing a custom no-undef rule that allows environment-specific globals (e.g., window, process) only when guarded by __BROWSER__ or __NODE__ checks. Current stable version 2.0.4, last release likely in 2019. Designed for universal code that runs in both browser and Node.js, enforcing that environment-sensitive globals are used only within appropriate conditional blocks. Requires ESLint 5.x or 6.x. Not actively maintained.

Common errors

error Error: Failed to load plugin 'cup': Cannot find module 'eslint-plugin-cup' ↓

cause Missing local installation.

fix

npm install eslint-plugin-cup --save-dev

error Definition for rule 'cup/no-undef' was not found. ↓

cause ESLint version incompatible (requires 5.x - 6.x).

fix

Use ESLint 5.x or 6.x, or check that the plugin is properly loaded.

Warnings

gotcha cup/no-undef replaces the standard no-undef; both should not be used together. ↓

fix Disable the default 'no-undef' rule when using 'cup/no-undef'.

deprecated Package is no longer actively maintained; may not work with ESLint 7+. ↓

fix Consider migrating to a custom rule or alternative solution.

Install

npm install eslint-plugin-cup

yarn add eslint-plugin-cup

pnpm add eslint-plugin-cup

Imports

rules
wrong
```
const rules = require('eslint-plugin-cup').rules
```
correct
```
import { rules } from 'eslint-plugin-cup'
```
ESM import works; the package also provides a CommonJS entry via module.exports.

configs

wrong

const configs = require('eslint-plugin-cup').configs

correct

import { configs } from 'eslint-plugin-cup'

Exported for programmatic use, but typically not needed.

Quickstart

Configures ESLint to use the cup/no-undef rule instead of the default no-undef.

// .eslintrc.js
module.exports = {
  plugins: ['cup'],
  rules: {
    'cup/no-undef': 'error'
  }
};