eslint-json

library2.0.0jsnpmunverified

JSON reporter for ESLint that outputs lint results as a JSON array. Version 2.0.0, stable, low maintenance. Key differentiator: simplifies piping ESLint output to other tools (e.g., CI, custom scripts) by using standard JSON format. No breaking changes since initial release. Commonly used in build pipelines. Lightweight with zero dependencies.

devops testing

npm install eslint-json

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-JSON

eslint-json

devopsjavascriptv2.0.0

Install

—

Import

—

Disk

—

Pass rate

0/ 6

Env Coverage0 / 6

glibc

18–22

musl

18–22

Install & Compatibility

Where this runs

tested against v? · npm install

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

node 18–226 runs

build_error

glibc

node 18–226 runs

build_error

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

default

✓ const eslintJson = require('eslint-json');

✗ import eslintJson from 'eslint-json';

Package is CJS only; no default export for ESM. Use require().

results

✓ const results = require('eslint-json')(results, config);

✗ const results = require('eslint-json').format(results, config);

Direct call returns formatted JSON string; no .format method.

ESLint formatter

✓ eslint --format=node_modules/eslint-json file.js

✗ eslint --format=json file.js

Must specify full path to module, not just 'json'.

Demonstrates how to programmatically use eslint-json to format ESLint results as JSON.

const eslint = require('eslint'); const formatter = require('eslint-json'); const cli = new eslint.CLIEngine({}); const report = cli.executeOnFiles(['index.js']); const jsonOutput = formatter(report.results, report.config); console.log(jsonOutput);

eslint-json --version

Debug

Known issues

gotchaMust pass results array as first argument, not the full report object.

fix

Use report.results (array) instead of report (object).

affects: >=1.0.0

gotchaThe formatter output is a string, not a JavaScript object. Must JSON.parse before using as object.

fix

const output = JSON.parse(formatter(results, config));

affects: >=1.0.0

gotchaWhen using ESLint CLI, the format path must be exactly 'node_modules/eslint-json' or full path; relative path may fail if cwd is not project root.

fix

Use absolute path or 'node_modules/eslint-json'.

affects: >=1.0.0

Errors

Common errors & fixes

Error: Cannot find module 'eslint-json'

Module not installed or path incorrect.

fix

npm install --save-dev eslint-json and use full path: eslint --format=./node_modules/eslint-json file.js

TypeError: formatter is not a function

Using wrong require pattern (e.g., import from ESM).

fix

Use require('eslint-json') and call as function: formatter(results, config);

TypeError: results is not iterable

Passed entire report object instead of results array.

fix

Use report.results (the array) as first argument.

Upgrade

Version history

2.0.0latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/sindresorhus/eslint-json ↗

packagehttps://www.npmjs.com/package/eslint-json ↗