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href="../../cli-commands/npm-org">npm org<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Manage orgs</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-outdated">npm outdated<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Check for outdated packages</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-owner">npm owner<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Manage package owners</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-pack">npm pack<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Create a tarball from a package</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-ping">npm ping<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Ping npm registry</span></a></div><div 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start<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Start a package</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-stop">npm stop<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Stop a package</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-team">npm team<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Manage organization teams and team memberships</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-test">npm test<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Test a package</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-token">npm token<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Manage your authentication tokens</span></a></div><div class="css-l3rx45"><a 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bNiGAM">View registry info</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../cli-commands/npm-whoami">npm whoami<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Display npm username</span></a></div></div></div><div><button class="Accordion__SectionButton-i8yhwx-0 dsecBh">configuring-npm</button><div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../configuring-npm/folders">folders<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Folder Structures Used by npm</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../configuring-npm/install">install<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Download and install node and npm</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../configuring-npm/npmrc">npmrc<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">The npm config 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iPgskl" href="../../using-npm/registry">registry<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">The JavaScript Package Registry</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/removal">removal<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Cleaning the Slate</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/scope">scope<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Scoped packages</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/scripts">scripts<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">How npm handles the "scripts" field</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/semver">semver<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">The semantic versioner for npm</span></a></div></div></div></nav><style data-emotion-css="16vu25q">.css-16vu25q{box-sizing:border-box;margin:0;min-width:0;width:100%;}</style><div class="css-16vu25q"><div class="Page__Content-sc-4b62ym-0 gJQTGP documentation"><div><h1 id="npm-run-script1" style="position:relative;"><a href="#npm-run-script1" aria-label="npm run script1 permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>npm run-script</h1>
<h2 id="run-arbitrary-package-scripts" style="position:relative;"><a href="#run-arbitrary-package-scripts" aria-label="run arbitrary package scripts permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Run arbitrary package scripts</h2>
<h3 id="synopsis" style="position:relative;"><a href="#synopsis" aria-label="synopsis permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Synopsis</h3>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash"><span class="token function">npm</span> run-script <span class="token operator"><</span>command<span class="token operator">></span> <span class="token punctuation">[</span>--silent<span class="token punctuation">]</span> <span class="token punctuation">[</span>-- <span class="token operator"><</span>args<span class="token operator">></span><span class="token punctuation">..</span>.<span class="token punctuation">]</span>
alias: <span class="token function">npm</span> run</code></pre></div>
<h3 id="description" style="position:relative;"><a href="#description" aria-label="description permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Description</h3>
<p>This runs an arbitrary command from a package's <code class="language-text">"scripts"</code> object. If no
<code class="language-text">"command"</code> is provided, it will list the available scripts. <code class="language-text">run[-script]</code> is
used by the test, start, restart, and stop commands, but can be called
directly, as well. When the scripts in the package are printed out, they're
separated into lifecycle (test, start, restart) and directly-run scripts.</p>
<p>As of <a href="https://blog.npmjs.org/post/98131109725/npm-2-0-0"><code class="language-text">npm@2.0.0</code></a>, you can
use custom arguments when executing scripts. The special option <code class="language-text">--</code> is used by
<a href="https://goo.gl/KxMmtG">getopt</a> to delimit the end of the options. npm will pass
all the arguments after the <code class="language-text">--</code> directly to your script:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash"><span class="token function">npm</span> run <span class="token builtin class-name">test</span> -- --grep<span class="token operator">=</span><span class="token string">"pattern"</span></code></pre></div>
<p>The arguments will only be passed to the script specified after <code class="language-text">npm run</code>
and not to any pre or post script.</p>
<p>The <code class="language-text">env</code> script is a special built-in command that can be used to list
environment variables that will be available to the script at runtime. If an
"env" command is defined in your package, it will take precedence over the
built-in.</p>
<p>In addition to the shell's pre-existing <code class="language-text">PATH</code>, <code class="language-text">npm run</code> adds
<code class="language-text">node_modules/.bin</code> to the <code class="language-text">PATH</code> provided to scripts. Any binaries provided by
locally-installed dependencies can be used without the <code class="language-text">node_modules/.bin</code>
prefix. For example, if there is a <code class="language-text">devDependency</code> on <code class="language-text">tap</code> in your package,
you should write:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash"><span class="token string">"scripts"</span><span class="token builtin class-name">:</span> <span class="token punctuation">{</span><span class="token string">"test"</span><span class="token builtin class-name">:</span> <span class="token string">"tap test/\*.js"</span><span class="token punctuation">}</span></code></pre></div>
<p>instead of</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash"><span class="token string">"scripts"</span><span class="token builtin class-name">:</span> <span class="token punctuation">{</span><span class="token string">"test"</span><span class="token builtin class-name">:</span> <span class="token string">"node_modules/.bin/tap test/\*.js"</span><span class="token punctuation">}</span></code></pre></div>
<p>to run your tests.</p>
<p>The actual shell your script is run within is platform dependent. By default,
on Unix-like systems it is the <code class="language-text">/bin/sh</code> command, on Windows it is the <code class="language-text">cmd.exe</code>.
The actual shell referred to by <code class="language-text">/bin/sh</code> also depends on the system.
As of <a href="https://github.com/npm/npm/releases/tag/v5.1.0"><code class="language-text">npm@5.1.0</code></a> you can
customize the shell with the <code class="language-text">script-shell</code> configuration.</p>
<p>Scripts are run from the root of the module, regardless of what your current
working directory is when you call <code class="language-text">npm run</code>. If you want your script to
use different behavior based on what subdirectory you're in, you can use the
<code class="language-text">INIT_CWD</code> environment variable, which holds the full path you were in when
you ran <code class="language-text">npm run</code>.</p>
<p><code class="language-text">npm run</code> sets the <code class="language-text">NODE</code> environment variable to the <code class="language-text">node</code> executable with
which <code class="language-text">npm</code> is executed. Also, if the <code class="language-text">--scripts-prepend-node-path</code> is passed,
the directory within which <code class="language-text">node</code> resides is added to the
<code class="language-text">PATH</code>. If <code class="language-text">--scripts-prepend-node-path=auto</code> is passed (which has been the
default in <code class="language-text">npm</code> v3), this is only performed when that <code class="language-text">node</code> executable is
not found in the <code class="language-text">PATH</code>.</p>
<p>If you try to run a script without having a <code class="language-text">node_modules</code> directory and it fails,
you will be given a warning to run <code class="language-text">npm install</code>, just in case you've forgotten.</p>
<p>You can use the <code class="language-text">--silent</code> flag to prevent showing <code class="language-text">npm ERR!</code> output on error.</p>
<p>You can use the <code class="language-text">--if-present</code> flag to avoid exiting with a non-zero exit code
when the script is undefined. This lets you run potentially undefined scripts
without breaking the execution chain.</p>
<h3 id="see-also" style="position:relative;"><a href="#see-also" aria-label="see also permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>See Also</h3>
<ul>
<li><a href="../../using-npm/scripts">npm scripts</a></li>
<li><a href="../../cli-commands/npm-test">npm test</a></li>
<li><a href="../../cli-commands/npm-start">npm start</a></li>
<li><a href="../../cli-commands/npm-restart">npm restart</a></li>
<li><a href="../../cli-commands/npm-stop">npm stop</a></li>
<li><a href="../../cli-commands/npm-config">npm config</a></li>
</ul></div><div class="FoundTypo__Container-sc-1e373sc-0 fMOzaj"><p><span role="img" aria-label="eyes-emoji">👀</span> Found a typo? <a href="https://github.com/npm/cli/">Let us know!</a></p><p>The current stable version of npm is <a href="https://github.com/npm/cli/">here</a>. To upgrade, run: <code class="language-text">npm install npm@latest -g</code></p><p>To report bugs or submit feature requests for the docs, please post <a href="https://github.com/npm/cli/issues">here</a>. Submit npm issues <a href="https://github.com/npm/cli/issues">here.</a></p></div><script>
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