Registry / testing / eslint-formatter-mo

eslint-formatter-mo

library2.4.1jsnpmunverified

Good-lookin' ESLint formatter for delightful readability. Current stable version is 2.4.1, released November 2025, with regular updates. Key differentiators: colorful output with code highlighting via Shiki, support for 50+ VS Code themes, JSON/Markdown/CSS highlighting, and auto-fixable markers. ESM-only since v2 (breaking change). Active maintenance with frequent bug fixes.

testing

npm install eslint-formatter-mo

github ↗package ↗

INSTALL

IMPORT

SIG · ESLINT-FORMATTER-M

eslint-formatter-mo

testingjavascriptv2.4.1

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

✓ import eslintFormatterMo from 'eslint-formatter-mo'

✗ const eslintFormatterMo = require('eslint-formatter-mo')

ESM-only since v2; CommonJS require will fail.

default (as formatter function)

✓ import mo from 'eslint-formatter-mo'; eslint.lintFiles(patterns).then(results => console.log(mo(results)))

✗ const mo = require('eslint-formatter-mo');

The default export is a function that takes ESLint results and returns a formatted string.

TypeScript type (if provided)

✓ import type { ESLintFormatter } from 'eslint-formatter-mo'

Types may be bundled; check package for type definitions.

Shows installation as dev dependency, CLI usage with `-f mo`, programmatic use with import, and custom theme via environment variable.

// Install: npm i eslint-formatter-mo -D // Use as ESLint formatter via CLI: // eslint src/ -f mo // Or programmatically: import mo from 'eslint-formatter-mo'; import { ESLint } from 'eslint'; const eslint = new ESLint(); const results = await eslint.lintFiles(['src/']); const formatted = mo(results); console.log(formatted); // Custom theme via env var: // MO_THEME=dracula eslint src/ -f mo

Debug

Known issues

breakingv2.0.0 moved to ESM only. CommonJS require() will throw an error.

fix

Use import syntax or upgrade to Node 18+ with "type": "module" in package.json.

affects: >=2.0.0

deprecatedv1.x is no longer maintained. Users should upgrade to v2.x.

fix

Upgrade to v2.4.1 and migrate to ESM.

affects: <2.0.0

gotchaThe formatter uses Shiki for syntax highlighting, which requires network access for theme loading on first use.

fix

Ensure network access or pre-cache themes. The package will work without highlighting if offline.

affects: >=2.0.0

gotchaEnvironment variable MO_THEME must be set before running ESLint, not during.

fix

Set MO_THEME in your shell or .env file before calling eslint.

affects: >=2.0.0

gotchaOutput is designed for terminals; may not render correctly in CI logs or non-TTY environments.

fix

Use --no-color or pipe output to a file for non-TTY environments.

affects: >=1.0.0

Errors

Common errors & fixes

Cannot find module 'eslint-formatter-mo'

Package not installed or not in node_modules.

fix

Run `npm install eslint-formatter-mo --save-dev`.

require() of ES Module eslint-formatter-mo from CommonJS not supported.

Using CommonJS require() with ESM-only v2+.

fix

Use `import` syntax or downgrade to v1.x (not recommended).

Error: Cannot access 'ruleId' before initialization

Bug in v2.4.0 fixed in v2.4.1.

fix

Upgrade to v2.4.1 or later.

Upgrade

Version history

2.4.1latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

9 hits · last 30 days

node

Amazon

Resources

githubhttps://github.com/fengzilong/eslint-formatter-mo ↗

packagehttps://www.npmjs.com/package/eslint-formatter-mo ↗