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index.html
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href="../../cli-commands/npm-view">npm view<span class="DocLinks__LinkDesc-sc-1vrw6od-0 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" 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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-init1" style="position:relative;"><a href="#npm-init1" aria-label="npm init1 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 init</h1>
<h2 id="create-a-packagejson-file" style="position:relative;"><a href="#create-a-packagejson-file" aria-label="create a packagejson file 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>create a package.json file</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> init <span class="token punctuation">[</span>--force<span class="token operator">|</span>-f<span class="token operator">|</span>--yes<span class="token operator">|</span>-y<span class="token operator">|</span>--scope<span class="token punctuation">]</span>
<span class="token function">npm</span> init <span class="token operator"><</span>@scope<span class="token operator">></span> <span class="token punctuation">(</span>same as <span class="token variable"><span class="token variable">`</span>npx <span class="token operator"><</span>@scope<span class="token operator">></span>/create<span class="token variable">`</span></span><span class="token punctuation">)</span>
<span class="token function">npm</span> init <span class="token punctuation">[</span><span class="token operator"><</span>@scope<span class="token operator">></span>/<span class="token punctuation">]</span><span class="token operator"><</span>name<span class="token operator">></span> <span class="token punctuation">(</span>same as <span class="token variable"><span class="token variable">`</span>npx <span class="token punctuation">[</span><span class="token operator"><</span>@scope<span class="token operator">></span>/<span class="token punctuation">]</span>create-<span class="token operator"><</span>name<span class="token operator">></span><span class="token variable">`</span></span><span class="token punctuation">)</span></code></pre></div>
<h3 id="examples" style="position:relative;"><a href="#examples" aria-label="examples 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>Examples</h3>
<p>Create a new React-based project using <a href="https://npm.im/create-react-app"><code class="language-text">create-react-app</code></a>:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash">$ <span class="token function">npm</span> init react-app ./my-react-app</code></pre></div>
<p>Create a new <code class="language-text">esm</code>-compatible package using <a href="https://npm.im/create-esm"><code class="language-text">create-esm</code></a>:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash">$ <span class="token function">mkdir</span> my-esm-lib <span class="token operator">&&</span> <span class="token builtin class-name">cd</span> my-esm-lib
$ <span class="token function">npm</span> init esm --yes</code></pre></div>
<p>Generate a plain old package.json using legacy init:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash">$ <span class="token function">mkdir</span> my-npm-pkg <span class="token operator">&&</span> <span class="token builtin class-name">cd</span> my-npm-pkg
$ <span class="token function">git</span> init
$ <span class="token function">npm</span> init</code></pre></div>
<p>Generate it without having it ask any questions:</p>
<div class="gatsby-highlight" data-language="bash"><pre class="language-bash"><code class="language-bash">$ <span class="token function">npm</span> init -y</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><code class="language-text">npm init <initializer></code> can be used to set up a new or existing npm package.</p>
<p><code class="language-text">initializer</code> in this case is an npm package named <code class="language-text">create-<initializer></code>, which
will be installed by <a href="https://npm.im/npx"><code class="language-text">npx</code></a>, and then have its main bin
executed -- presumably creating or updating <code class="language-text">package.json</code> and running any other
initialization-related operations.</p>
<p>The init command is transformed to a corresponding <code class="language-text">npx</code> operation as follows:</p>
<ul>
<li><code class="language-text">npm init foo</code> -> <code class="language-text">npx create-foo</code></li>
<li><code class="language-text">npm init @usr/foo</code> -> <code class="language-text">npx @usr/create-foo</code></li>
<li><code class="language-text">npm init @usr</code> -> <code class="language-text">npx @usr/create</code></li>
</ul>
<p>Any additional options will be passed directly to the command, so <code class="language-text">npm init foo
--hello</code> will map to <code class="language-text">npx create-foo --hello</code>.</p>
<p>If the initializer is omitted (by just calling <code class="language-text">npm init</code>), init will fall back
to legacy init behavior. It will ask you a bunch of questions, and then write a
package.json for you. It will attempt to make reasonable guesses based on
existing fields, dependencies, and options selected. It is strictly additive, so
it will keep any fields and values that were already set. You can also use
<code class="language-text">-y</code>/<code class="language-text">--yes</code> to skip the questionnaire altogether. If you pass <code class="language-text">--scope</code>, it
will create a scoped package.</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="https://github.com/isaacs/init-package-json">https://github.com/isaacs/init-package-json</a></li>
<li><a href="../../configuring-npm/package-json">package.json</a></li>
<li><a href="../../cli-commands/npm-version">npm version</a></li>
<li><a href="../../using-npm/scope">npm scope</a></li>
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