Bootstrap/docs/_includes/components/thumbnails.html

<div class="bs-docs-section">
  <h1 id="thumbnails" class="page-header">Thumbnails</h1>

  <p class="lead">Extend Bootstrap's <a href="{{ site.baseurl }}/css/#grid">grid system</a> with the thumbnail component to easily display grids of images, videos, text, and more.</p>
  <p>If you're looking for Pinterest-like presentation of thumbnails of varying heights and/or widths, you'll need to use a third-party plugin such as <a href="https://masonry.desandro.com/">Masonry</a>, <a href="https://isotope.metafizzy.co/">Isotope</a>, or <a href="https://salvattore.js.org/">Salvattore</a>.</p>

  <h2 id="thumbnails-default">Default example</h2>
  <p>By default, Bootstrap's thumbnails are designed to showcase linked images with minimal required markup.</p>
  <div class="bs-example" data-example-id="simple-thumbnails">
    <div class="row">
      <div class="col-xs-6 col-md-3">
        <a href="#" class="thumbnail">
          <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
        </a>
      </div>
      <div class="col-xs-6 col-md-3">
        <a href="#" class="thumbnail">
          <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
        </a>
      </div>
      <div class="col-xs-6 col-md-3">
        <a href="#" class="thumbnail">
          <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
        </a>
      </div>
      <div class="col-xs-6 col-md-3">
        <a href="#" class="thumbnail">
          <img data-src="holder.js/100%x180" alt="Generic placeholder thumbnail">
        </a>
      </div>
    </div>
  </div><!-- /.bs-example -->
{% highlight html %}
<div class="row">
  <div class="col-xs-6 col-md-3">
    <a href="#" class="thumbnail">
      <img src="..." alt="...">
    </a>
  </div>
  ...
</div>
{% endhighlight %}

  <h2 id="thumbnails-custom-content">Custom content</h2>
  <p>With a bit of extra markup, it's possible to add any kind of HTML content like headings, paragraphs, or buttons into thumbnails.</p>
  <div class="bs-example" data-example-id="thumbnails-with-custom-content">
    <div class="row">
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img data-src="holder.js/100%x200" alt="Generic placeholder thumbnail">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img data-src="holder.js/100%x200" alt="Generic placeholder thumbnail">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img data-src="holder.js/100%x200" alt="Generic placeholder thumbnail">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
    </div>
  </div><!-- /.bs-example -->
{% highlight html %}
<div class="row">
  <div class="col-sm-6 col-md-4">
    <div class="thumbnail">
      <img src="..." alt="...">
      <div class="caption">
        <h3>Thumbnail label</h3>
        <p>...</p>
        <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
      </div>
    </div>
  </div>
</div>
{% endhighlight %}
</div>