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npm command-line interface
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<h1 id="npm-find-dupes">npm-find-dupes</h1>
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<span class="description">Find duplication in the package tree</span>
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</header>
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<section id="table_of_contents">
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<h2 id="table-of-contents">Table of contents</h2>
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<div id="_table_of_contents"><ul><li><a href="#synopsis">Synopsis</a></li><li><a href="#description">Description</a></li><li><a href="#configuration">Configuration</a></li><ul><li><a href="#install-strategy"><code>install-strategy</code></a></li><li><a href="#legacy-bundling"><code>legacy-bundling</code></a></li><li><a href="#global-style"><code>global-style</code></a></li><li><a href="#strict-peer-deps"><code>strict-peer-deps</code></a></li><li><a href="#package-lock"><code>package-lock</code></a></li><li><a href="#omit"><code>omit</code></a></li><li><a href="#ignore-scripts"><code>ignore-scripts</code></a></li><li><a href="#audit"><code>audit</code></a></li><li><a href="#bin-links"><code>bin-links</code></a></li><li><a href="#fund"><code>fund</code></a></li><li><a href="#workspace"><code>workspace</code></a></li><li><a href="#workspaces"><code>workspaces</code></a></li><li><a href="#include-workspace-root"><code>include-workspace-root</code></a></li><li><a href="#install-links"><code>install-links</code></a></li></ul><li><a href="#see-also">See Also</a></li></ul></div>
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</section>
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<div id="_content"><h3 id="synopsis">Synopsis</h3>
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<pre><code class="language-bash">npm find-dupes
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</code></pre>
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<h3 id="description">Description</h3>
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<p>Runs <code>npm dedupe</code> in <code>--dry-run</code> mode, making npm only output the
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duplications, without actually changing the package tree.</p>
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<h3 id="configuration">Configuration</h3>
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<h4 id="install-strategy"><code>install-strategy</code></h4>
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<ul>
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<li>Default: "hoisted"</li>
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<li>Type: "hoisted", "nested", "shallow", or "linked"</li>
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</ul>
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<p>Sets the strategy for installing packages in node_modules. hoisted
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(default): Install non-duplicated in top-level, and duplicated as necessary
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within directory structure. nested: (formerly --legacy-bundling) install in
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place, no hoisting. shallow (formerly --global-style) only install direct
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deps at top-level. linked: (experimental) install in node_modules/.store,
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link in place, unhoisted.</p>
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<h4 id="legacy-bundling"><code>legacy-bundling</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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<li>DEPRECATED: This option has been deprecated in favor of
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<code>--install-strategy=nested</code></li>
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</ul>
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<p>Instead of hoisting package installs in <code>node_modules</code>, install packages in
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the same manner that they are depended on. This may cause very deep
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directory structures and duplicate package installs as there is no
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de-duplicating. Sets <code>--install-strategy=nested</code>.</p>
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<h4 id="global-style"><code>global-style</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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<li>DEPRECATED: This option has been deprecated in favor of
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<code>--install-strategy=shallow</code></li>
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</ul>
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<p>Only install direct dependencies in the top level <code>node_modules</code>, but hoist
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on deeper dependencies. Sets <code>--install-strategy=shallow</code>.</p>
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<h4 id="strict-peer-deps"><code>strict-peer-deps</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>If set to <code>true</code>, and <code>--legacy-peer-deps</code> is not set, then <em>any</em>
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conflicting <code>peerDependencies</code> will be treated as an install failure, even
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if npm could reasonably guess the appropriate resolution based on non-peer
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dependency relationships.</p>
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<p>By default, conflicting <code>peerDependencies</code> deep in the dependency graph will
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be resolved using the nearest non-peer dependency specification, even if
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doing so will result in some packages receiving a peer dependency outside
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the range set in their package's <code>peerDependencies</code> object.</p>
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<p>When such an override is performed, a warning is printed, explaining the
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conflict and the packages involved. If <code>--strict-peer-deps</code> is set, then
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this warning is treated as a failure.</p>
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<h4 id="package-lock"><code>package-lock</code></h4>
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<ul>
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<li>Default: true</li>
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<li>Type: Boolean</li>
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</ul>
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<p>If set to false, then ignore <code>package-lock.json</code> files when installing. This
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will also prevent <em>writing</em> <code>package-lock.json</code> if <code>save</code> is true.</p>
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<p>This configuration does not affect <code>npm ci</code>.</p>
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<h4 id="omit"><code>omit</code></h4>
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<ul>
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<li>Default: 'dev' if the <code>NODE_ENV</code> environment variable is set to
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'production', otherwise empty.</li>
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<li>Type: "dev", "optional", or "peer" (can be set multiple times)</li>
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</ul>
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<p>Dependency types to omit from the installation tree on disk.</p>
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<p>Note that these dependencies <em>are</em> still resolved and added to the
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<code>package-lock.json</code> or <code>npm-shrinkwrap.json</code> file. They are just not
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physically installed on disk.</p>
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<p>If a package type appears in both the <code>--include</code> and <code>--omit</code> lists, then
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it will be included.</p>
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<p>If the resulting omit list includes <code>'dev'</code>, then the <code>NODE_ENV</code> environment
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variable will be set to <code>'production'</code> for all lifecycle scripts.</p>
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<h4 id="ignore-scripts"><code>ignore-scripts</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>If true, npm does not run scripts specified in package.json files.</p>
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<p>Note that commands explicitly intended to run a particular script, such as
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<code>npm start</code>, <code>npm stop</code>, <code>npm restart</code>, <code>npm test</code>, and <code>npm run-script</code>
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will still run their intended script if <code>ignore-scripts</code> is set, but they
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will <em>not</em> run any pre- or post-scripts.</p>
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<h4 id="audit"><code>audit</code></h4>
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<ul>
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<li>Default: true</li>
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<li>Type: Boolean</li>
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</ul>
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<p>When "true" submit audit reports alongside the current npm command to the
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default registry and all registries configured for scopes. See the
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documentation for <a href="../commands/npm-audit.html"><code>npm audit</code></a> for details on what is
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submitted.</p>
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<h4 id="bin-links"><code>bin-links</code></h4>
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<ul>
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<li>Default: true</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Tells npm to create symlinks (or <code>.cmd</code> shims on Windows) for package
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executables.</p>
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<p>Set to false to have it not do this. This can be used to work around the
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fact that some file systems don't support symlinks, even on ostensibly Unix
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systems.</p>
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<h4 id="fund"><code>fund</code></h4>
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<ul>
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<li>Default: true</li>
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<li>Type: Boolean</li>
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</ul>
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<p>When "true" displays the message at the end of each <code>npm install</code>
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acknowledging the number of dependencies looking for funding. See <a href="../commands/npm-fund.html"><code>npm fund</code></a> for details.</p>
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<h4 id="workspace"><code>workspace</code></h4>
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<ul>
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<li>Default:</li>
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<li>Type: String (can be set multiple times)</li>
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</ul>
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<p>Enable running a command in the context of the configured workspaces of the
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current project while filtering by running only the workspaces defined by
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this configuration option.</p>
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<p>Valid values for the <code>workspace</code> config are either:</p>
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<ul>
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<li>Workspace names</li>
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<li>Path to a workspace directory</li>
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<li>Path to a parent workspace directory (will result in selecting all
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workspaces within that folder)</li>
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</ul>
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<p>When set for the <code>npm init</code> command, this may be set to the folder of a
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workspace which does not yet exist, to create the folder and set it up as a
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brand new workspace within the project.</p>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="workspaces"><code>workspaces</code></h4>
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<ul>
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<li>Default: null</li>
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<li>Type: null or Boolean</li>
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</ul>
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<p>Set to true to run the command in the context of <strong>all</strong> configured
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workspaces.</p>
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<p>Explicitly setting this to false will cause commands like <code>install</code> to
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ignore workspaces altogether. When not set explicitly:</p>
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<ul>
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<li>Commands that operate on the <code>node_modules</code> tree (install, update, etc.)
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will link workspaces into the <code>node_modules</code> folder. - Commands that do
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other things (test, exec, publish, etc.) will operate on the root project,
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<em>unless</em> one or more workspaces are specified in the <code>workspace</code> config.</li>
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</ul>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="include-workspace-root"><code>include-workspace-root</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>Include the workspace root when workspaces are enabled for a command.</p>
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<p>When false, specifying individual workspaces via the <code>workspace</code> config, or
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all workspaces via the <code>workspaces</code> flag, will cause npm to operate only on
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the specified workspaces, and not on the root project.</p>
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<p>This value is not exported to the environment for child processes.</p>
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<h4 id="install-links"><code>install-links</code></h4>
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<ul>
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<li>Default: false</li>
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<li>Type: Boolean</li>
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</ul>
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<p>When set file: protocol dependencies will be packed and installed as regular
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dependencies instead of creating a symlink. This option has no effect on
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workspaces.</p>
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<h3 id="see-also">See Also</h3>
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<ul>
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<li><a href="../commands/npm-dedupe.html">npm dedupe</a></li>
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<li><a href="../commands/npm-ls.html">npm ls</a></li>
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<li><a href="../commands/npm-update.html">npm update</a></li>
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<li><a href="../commands/npm-install.html">npm install</a></li>
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</ul></div>
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