node/deps/npm/doc/cli/npm-run-script.md

npm-run-script(1) -- Run arbitrary package scripts

SYNOPSIS

npm run-script [command] [-- <args>]
npm run [command] [-- <args>]

DESCRIPTION

This runs an arbitrary command from a package's "scripts" object. If no package name is provided, it will search for a package.json in the current folder and use its "scripts" object. If no "command" is provided, it will list the available top level scripts.

It is used by the test, start, restart, and stop commands, but can be called directly, as well.

As of npm@2.0.0, you can use custom arguments when executing scripts. The special option -- is used by getopt to delimit the end of the options. npm will pass all the arguments after the -- directly to your script:

npm run test -- --grep="pattern"

The arguments will only be passed to the script specified after npm run and not to any pre or post script.

SEE ALSO

• npm-scripts(7)
• npm-test(1)
• npm-start(1)
• npm-restart(1)
• npm-stop(1)