# eslint_d > Speed up eslint to accelerate your development workflow Latest version **15.1.0** (published 2026-11-04) · MIT license · 0 weekly downloads ## Install ```sh npm install eslint_d pnpm add eslint_d yarn add eslint_d bun add eslint_d ``` Provides the command `eslint_d`. ## Health **Score 60/100 (C)** — status: active. Positive: esm support; no vulnerabilities; recently updated; high maintenance score. Warnings: low downloads; no types. ## Facts | | | |---|---| | Version | 15.1.0 | | Published | 2026-11-04 | | First published | 2015-09-18 | | Weekly downloads | 0 | | License | MIT | | TypeScript types | none | | Module format | ESM | | Node | >=22 | | Dependencies | 3 | | Unpacked size | 105.7 KB | | Known vulnerabilities | 0 | | Install scripts | no | | GitHub stars | 1225 | | Author | Maximilian Antoni | | Maintainers | mantoni, aaronjensen | | Keywords | daemon, eslint, faster, lint, performance | ## Links - npm: https://www.npmjs.com/package/eslint_d - Repository: https://github.com/mantoni/eslint_d.js - Issues: https://github.com/mantoni/eslint_d.js/issues - npm.io page: https://npm.io/package/eslint_d ## Dependencies (3) - [debug](https://npm.io/package/debug.md) ^4.4.3 - [eslint](https://npm.io/package/eslint.md) ^10.0.3 - [supports-color](https://npm.io/package/supports-color.md) ^10.2.2 ## Alternatives - [eslint-plugin-sonarjs](https://npm.io/package/eslint-plugin-sonarjs.md) — 2.9M weekly downloads - [eslint-config-expo](https://npm.io/package/eslint-config-expo.md) — 1.5M weekly downloads - [@matter/protocol](https://npm.io/package/@matter/protocol.md) — 63.5K weekly downloads - [@eventcatalog/linter](https://npm.io/package/@eventcatalog/linter.md) — 24.8K weekly downloads - [@pandacss/eslint-plugin](https://npm.io/package/@pandacss/eslint-plugin.md) — 18.7K weekly downloads ## Recent versions - 15.1.0 (latest) — 2026-11-04 - 15.0.3 — 2026-07-31 - 15.0.2 — 2026-03-21 - 15.0.1 — 2026-03-21 - 15.0.0 — 2026-03-12 - 14.3.0 — 2024-12-19 - 14.2.2 — 2024-10-30 - 14.2.1 — 2024-10-30 - 14.2.0 — 2024-10-19 - 14.1.1 — 2024-10-04 - 14.1.0 — 2024-10-02 - 14.0.4 — 2024-09-19 - 14.0.3 — 2024-08-03 - 14.0.2 — 2024-08-02 - 14.0.1 — 2024-07-28 - … 67 more at https://npm.io/package/eslint_d/versions ## README

eslint_d

🪄 Speed up eslint to accelerate your development workflow

npm Version SemVer Build Status MIT License


> Runs [eslint][] in a background process to improve linting time while editing. > On a MacBook Air M4 with node.js v24.14.0 and eslint v10.0.3: ```bash ❯ eslint file.js # ~300ms ❯ eslint_d file.js # ~100ms ``` ## Features - Supports all eslint versions from v4 to v10. - Supports all LTS versions of node.js. - Automatically starts, stops and restarts the background server. - Binds to parent process, editor process or exits after IDLE time. - Falls back to bundled eslint if local eslint is missing. ## Setup ```bash ❯ npm i -g eslint_d ``` ### Vim - With [ale][]: ```vim let $ESLINT_D_PPID = getpid() let g:ale_javascript_eslint_executable = 'eslint_d' let g:ale_javascript_eslint_use_global = 1 ``` - With [syntastic][]: ```vim let $ESLINT_D_PPID = getpid() let g:syntastic_javascript_checkers = ['eslint'] let g:syntastic_javascript_eslint_exec = 'eslint_d' ``` ### Neovim - With [nvim-lint][] ```lua vim.env.ESLINT_D_PPID = vim.fn.getpid() require('lint').linters_by_ft = { javascript = {'eslint_d'}, typescript = {'eslint_d'}, } ``` ### Emacs Use [flycheck][] with the `javascript-eslint` checker: ```elisp (setq flycheck-javascript-eslint-executable "eslint_d") ``` ### Sublime The official [SublimeLinter-eslint][] plugin automatically prefers `eslint_d` if it finds one. ### Atom, VSCode, WebStorm You will not gain any performance from this module as these editors already cache eslint instances for you. --- If you're using `eslint_d` in any other editor, please let us know! ## Commands `eslint_d` is a drop-in replacement for `eslint`. It forwards all arguments to `eslint` and starts the background server if necessary: ``` eslint_d [options] file.js [file.js] [dir] ``` All arguments are passed to eslint, except for the following commands: ``` start Start the daemon stop Stop the daemon restart Restart the daemon status Show daemon status, process id and resolved eslint version --help, -h Show this help --version, -v Show version number of eslint_d and bundled eslint --fix-to-stdout Print fixed file to stdout (requires --stdin) ``` ## Environment variables - `ESLINT_D_PPID` Parent process id to monitor. If the parent process dies, the daemon exits as well. "0" disables monitoring (default), and "auto" monitors the parent process that started eslint_d. - `ESLINT_D_IDLE` Number of minutes of inactivity before the daemon exits. Defaults to "0" if `ESLINT_D_PPID` is set, otherwise "15". - `ESLINT_D_MISS` How to behave if local eslint is missing. "fallback" uses the bundled eslint (default). "fail" logs an error and exits with code 1. "ignore" silently exits with code 0. - `ESLINT_D_ROOT` Provide specific directory to search for `node_modules/eslint`. Useful in monorepos where `node_modules` might be in a location other than the project root. ## Automatic fixing `eslint_d` has an additional option that `eslint` does not have, `--fix-to-stdout` which prints the fixed file to stdout. This allows editors to add before save hooks to automatically fix a file prior to saving. It must be used with `--stdin`. ### Vim Add this to your `.vimrc` to lint the current buffer or visual selection on `f`: ```vim " Autofix entire buffer with eslint_d: nnoremap f mF:%!eslint_d --stdin --fix-to-stdout --stdin-filename %`F " Autofix visual selection with eslint_d: vnoremap f :!eslint_d --stdin --fix-to-stdoutgv ``` ### Emacs See [eslintd-fix](https://github.com/aaronjensen/eslintd-fix) ## How does this work? `eslint_d` starts a background server that runs `eslint` in a separate process. It communicates with the server over a Unix domain socket. When you run `eslint_d`, it forwards all arguments to the server and prints the result. This is faster because node.js doesn't have to load all the required modules every time. By default, `eslint_d` uses the local `eslint` package if available. If the local `eslint` package is missing, `eslint_d` falls back to the bundled `eslint` package. You can change this behavior with the `ESLINT_D_MISS` environment variable. To see which `eslint` package is used, run `eslint_d status`. A `.eslint_d-` file is stored in the resolved eslint installation directory which stores a security token, the server port and process id, and the hash of the monitored files. The filename includes a hash of the working directory, the explicit `--config` / `-c` path, and the inherited environment, so projects and configurations sharing an eslint installation use separate daemons. This isolates process-wide parser and plugin state between them. Environment values are hashed and are not stored in the address file. `DEBUG` is excluded because it is forwarded for each request. If the file is removed, the server exits. The `start`, `stop`, `restart` and `status` commands apply to the daemon for the current working directory, configuration and environment. Use the same environment and explicit `--config` / `-c` option for these commands as for linting, for example `NODE_ENV=production eslint_d stop`. The server automatically stops after 15 minutes of inactivity. You can change this with the `ESLINT_D_IDLE` environment variable. Alternatively, you can bind the lifetime of the server to a parent process by setting `ESLINT_D_PPID` to "auto" or a specific parent process id. The server will exit when the parent process dies. Note that "auto" uses the parent process that started `eslint_d`, which may not be the editor process. The server is also automatically restarted if one of the following files changed: `package.json`, `package-lock.json`, `npm-shrinkwrap.json`, `yarn.lock`, `pnpm-lock.yaml`. ## Debug mode > Added in `v14.2.0`. Pass the `--debug` flag to `eslint_d` to enable debug output. Use the `DEBUG` environment variable to limit debug output to `eslint_d`: ```bash ❯ DEBUG="eslint_d:*" ``` For server side debug output, restart with `--debug` in a separate terminal: ```bash ❯ eslint_d restart --debug # eslint and eslint_d logs ❯ DEBUG="eslint_d:*" eslint_d restart --debug # eslint_d logs only ``` This will keep the process attached to the terminal and print debug output. ## Compatibility - `15.0.0`: eslint 4 - 10, node 22 - 24 (ships with eslint 10) - `14.0.0`: eslint 4 - 9, node 18 - 22 (ships with eslint 9) (see [^1]) - `13.0.0`: eslint 4 - 8, node 12 - 20 (ships with eslint 8) - `12.0.0`: eslint 4 - 8, node 12 - 16 (ships with eslint 8) - `11.0.0`: eslint 4 - 8, node 12 - 16 (ships with eslint 7) - `10.0.0`: eslint 4 - 7, node 10 - 14 (using new `ESLint` API if available) - `9.0.0`: eslint 4 - 7, node 10 - 14 (using `CLIEngine` API) - `8.0.0`: eslint 4 - 6, node 8 - 12 - `7.2.0`: eslint 4 - 5, node 6 - 10 - `7.0.0`: eslint 5.4+, node 6, 8 and 10 - `6.0.0`: eslint 5.0+, node 6+ (eslint dropped node 4) - `5.0.0`: eslint 4.0+ - `4.0.0`: eslint 3.0+, node 4+ (eslint dropped node 0.10 and 0.12) - `3.0.0`: eslint 2.2+ - `1.0.0`, `2.0.0`: eslint 1.4+, node 4 (and probably older) ## License MIT [License]: https://img.shields.io/npm/l/eslint_d.svg [eslint]: https://eslint.org [ale]: https://github.com/dense-analysis/ale [syntastic]: https://github.com/scrooloose/syntastic [nvim-lint]: https://github.com/mfussenegger/nvim-lint [flycheck]: http://www.flycheck.org/ [SublimeLinter-eslint]: https://github.com/SublimeLinter/SublimeLinter-eslint [^1]: The support for `--fix-to-stdout` is only provided with eslint 5 and beyond. --- _Source: https://npm.io/package/eslint_d · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._