This file provides add-node-modules-path, which searches the current files parent directories for the node_modules/.bin/ directory and adds it to the buffer local exec-path. This allows Emacs to find project based installs of e.g. eslint.

M-x add-node-modules-path

To automatically run it when opening a new buffer: (Choose depending on your favorite mode.)

(eval-after-load 'js-mode
  '(add-hook 'js-mode-hook #'add-node-modules-path))

In a monorepo scenario it might make sense to add multiple directories. To achieve this, additional commands can be specified:

(use-package add-node-modules-path
  :custom
  (add-node-modules-path-command '("pnpm bin" "pnpm bin -w")))