eslint-output

4.0.2 verified Sat Apr 25 auth: no javascript

A wrapper around ESLint that exports multiple report formats (e.g., stylish, junit, gitlab) in a single run. v4.0.2 supports ESLint >=9 with Flat Config only. Configure via eslintoutput.config.js and CLI overrides. Releases are infrequent, with major version bumps tied to ESLint peer dep changes. Differentiator: eliminates need for multiple lint runs to get different formatters.

Common errors

error Cannot find module 'eslint' ↓

cause ESLint not installed or version mismatch

fix

npm install --save-dev eslint@^9

error Configuration file 'eslintoutput.config.js' not found ↓

cause Config file missing or wrong path

fix

Create eslintoutput.config.js in project root.

error Error: Unsupported format 'junit' ↓

cause Formatters removed from ESLint core

fix

npm install --save-dev eslint-formatter-junit

error Error while loading rule '...': Rule is not found ↓

cause ESLint Flat Config migration issue

fix

Ensure all plugins are installed and listed in flat config.

Warnings

breaking Config file renamed to eslintoutput.config.js in v4 (was eslintoutput.config.json or .js) ↓

fix Rename config file to eslintoutput.config.js and ensure it uses module.exports.

breaking ESLint peer dependency bumped to >=9; removed support for ESLint <9 ↓

fix Upgrade ESLint to v9 or later.

breaking Flat Config required; eslintrc configs no longer supported ↓

fix Migrate to ESLint Flat Config (eslint.config.js).

deprecated Built-in formatters removed from ESLint core (e.g., junit, gitlab, html) ↓

fix Install external formatters like eslint-formatter-junit.

gotcha File paths are relative to cwd; may not resolve as expected in monorepos ↓

fix Use absolute paths or run from correct directory.

Install

npm install eslint-output

yarn add eslint-output

pnpm add eslint-output

Imports

default (no named export)
wrong
```
import eslintOutput from 'eslint-output'
```
correct
```
npm install --save-dev eslint-output
```
eslint-output is a CLI tool, not a library. Do not import it in code.
eslint-output (CLI command)
wrong
```
require('eslint-output')
```
correct
```
npx eslint-output
```
Use as a script in package.json, not required programmatically.

ESLint config

wrong

import config from './eslintoutput.config.js'

correct

const config = require('./eslintoutput.config.js')

Config file uses CommonJS (module.exports). ESLint config itself may be ESM.

Quickstart

Basic configuration with two formatters: console output and file output.

// eslintoutput.config.js
module.exports = {
  files: ['.'],
  formats: [
    { name: 'stylish', output: 'console' },
    { name: 'junit', output: 'file', path: 'tmp/junit.xml' }
  ]
};

// package.json
"scripts": {
  "lint": "eslint-output"
}

// Run
npm run lint