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<h1 class="mb-3 bd-text-purple-bright">Bootstrap</h1>
<p class="lead">
Build responsive, mobile-first projects on the web with the world’s most popular front-end component library.
</p>
<p class="lead mb-4">
Bootstrap is an open source toolkit for developing with HTML, CSS, and JS. Quickly prototype your ideas or build your entire app with our Sass variables and mixins, responsive grid system, extensive prebuilt components, and powerful plugins built on jQuery.
</p>
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<a href="/docs/4.3/getting-started/introduction/" class="btn btn-lg btn-bd-primary w-100 mb-3" onclick="ga('send', 'event', 'Jumbotron actions', 'Get started', 'Get started');">Get started</a>
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<p class="text-muted mb-0">
Currently v4.3.1
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<script async src="https://cdn.carbonads.com/carbon.js?serve=CKYIKKJL&placement=getbootstrapcom" id="_carbonads_js"></script>
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<h3>Installation</h3>
<p>Include Bootstrap’s source Sass and JavaScript files via npm, Composer or Meteor. Package managed installs don’t include documentation, but do include our build system and readme.</p>
<figure class="highlight"><pre><code class="language-sh" data-lang="sh">npm <span class="nb">install </span>bootstrap</code></pre></figure>
<figure class="highlight"><pre><code class="language-sh" data-lang="sh">gem <span class="nb">install </span>bootstrap <span class="nt">-v</span> 4.3.1</code></pre></figure>
<hr class="half-rule">
<a class="btn btn-outline-primary" href="/docs/4.3/getting-started/download/">Read installation docs</a>
</div>
<div class="col-12 col-md-4 p-3 p-md-5 bg-light border border-white">
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<h3>BootstrapCDN</h3>
<p>When you only need to include Bootstrap’s compiled CSS or JS, you can use <a href="https://www.bootstrapcdn.com/">BootstrapCDN</a>.</p>
<h5>CSS only</h5>
<figure class="highlight"><pre><code class="language-html" data-lang="html"><span class="nt">&lt;link</span> <span class="na">rel=</span><span class="s">"stylesheet"</span> <span class="na">href=</span><span class="s">"https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"</span> <span class="na">integrity=</span><span class="s">"sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;</span></code></pre></figure>
<h5>JS, Popper.js, and jQuery</h5>
<figure class="highlight"><pre><code class="language-html" data-lang="html"><span class="nt">&lt;script </span><span class="na">src=</span><span class="s">"https://code.jquery.com/jquery-3.3.1.slim.min.js"</span> <span class="na">integrity=</span><span class="s">"sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;&lt;/script&gt;</span>
<span class="nt">&lt;script </span><span class="na">src=</span><span class="s">"https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"</span> <span class="na">integrity=</span><span class="s">"sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;&lt;/script&gt;</span>
<span class="nt">&lt;script </span><span class="na">src=</span><span class="s">"https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"</span> <span class="na">integrity=</span><span class="s">"sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"</span> <span class="na">crossorigin=</span><span class="s">"anonymous"</span><span class="nt">&gt;&lt;/script&gt;</span></code></pre></figure>
<hr class="half-rule">
<a class="btn btn-outline-primary" href="/docs/4.3/layout/overview/">Explore the docs</a>
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<h3>Official Themes</h3>
<p>
Take Bootstrap 4 to the next level with official premium themes—toolkits built on Bootstrap with new components and plugins, docs, and build tools.
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