esprint

library3.6.0jsnpmunverified

esprint (v3.6.0) is a parallelized ESLint runner that speeds up linting by running the linting engine across multiple threads. It sets up a server daemon to cache lint results in memory and uses a file watcher to only lint changed files. It also offers a CI mode that runs linting in parallel without a daemon. Maintenance is sporadic; the last release was in 2021. Key differentiators include automatic CPU core utilization, a background server for caching, and a dedicated CI mode. Requires Node >=12 and ESLint >=7.

testing

npm install esprint

github ↗package ↗

INSTALL

IMPORT

SIG · ESPRINT

esprint

testingjavascriptv3.6.0

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.

esprint (CLI)

✓ npx esprint

✗ npx eslint

esprint is primarily a CLI tool; there is no JavaScript API export.

esprint check

✓ npx esprint check

✗ npx eslint .

Use 'esprint check' for CI mode (no daemon).

esprint stop

✓ npx esprint stop

✗ kill <pid>

Stops the background server and clears cache.

Configure paths in .esprintrc, then run esprint in default or CI mode.

// .esprintrc { "paths": ["src/**/*.js"], "ignored": ["**/node_modules/**"], "port": 5004 } // Terminal esprint --workers=4 esprint check --fix

esprint --version

Debug

Known issues

breakingThe option to specify number of workers has been removed from .esprintrc in v0.4.0-beta.10.

fix

Use --workers CLI argument instead of .esprintrc configuration.

affects: >=0.4.0-beta.10

deprecatedesprint is no longer actively maintained; no releases since 2021.

fix

Consider alternatives like eslint-plugin-only-warn or lint-staged with parallel.

affects: >=3.0.0

gotchaesprint requires .esprintrc file in project root; absence causes error.

fix

Create a .esprintrc file in your project root with paths and ignored lists.

affects: >=0.4.0

gotchaRunning esprint from a subfolder may not work correctly if .esprintrc is not at project root.

fix

Ensure .esprintrc is in the root directory.

affects: <0.4.0

gotchaesprint uses a background server on a port; conflicts with other services possible.

fix

Specify a different port in .esprintrc or use esprint check to avoid daemon.

affects: >=0.4.0

Errors

Common errors & fixes

Error: No .esprintrc file found

Missing configuration file in project root.

fix

Create a .esprintrc file with paths and ignored fields.

Error: Cannot find module 'eslint'

ESLint peer dependency not installed.

fix

Run npm install eslint@>=7

Error: Port 5004 is already in use

Another process is using the default or configured port.

fix

Specify an unused port in .esprintrc or kill the offending process.

Upgrade

Version history

3.6.0latest on npm

Audit

Dependencies

eslintrequiredPeer dependency: esprint runs ESLint internally

Agent activity

14 hits · last 30 days

node

Resources

githubhttps://github.com/pinterest/esprint ↗

packagehttps://www.npmjs.com/package/esprint ↗