<pclass="lead">Basic grid layouts to get you familiar with building within the Bootstrap grid system.</p>
<h3>Five grid tiers</h3>
<p>There are five tiers to the Bootstrap grid system, one for each range of devices we support. Each tier starts at a minimum viewport size and automatically applies to the larger devices unless overridden.</p>
<divclass="row">
<divclass="col-4">.col-4</div>
<divclass="col-4">.col-4</div>
<divclass="col-4">.col-4</div>
</div>
<divclass="row">
<divclass="col-sm-4">.col-sm-4</div>
<divclass="col-sm-4">.col-sm-4</div>
<divclass="col-sm-4">.col-sm-4</div>
</div>
<divclass="row">
<divclass="col-md-4">.col-md-4</div>
<divclass="col-md-4">.col-md-4</div>
<divclass="col-md-4">.col-md-4</div>
</div>
<divclass="row">
<divclass="col-lg-4">.col-lg-4</div>
<divclass="col-lg-4">.col-lg-4</div>
<divclass="col-lg-4">.col-lg-4</div>
</div>
<divclass="row">
<divclass="col-xl-4">.col-xl-4</div>
<divclass="col-xl-4">.col-xl-4</div>
<divclass="col-xl-4">.col-xl-4</div>
</div>
<h3>Three equal columns</h3>
<p>Get three equal-width columns <strong>starting at desktops and scaling to large desktops</strong>. On mobile devices, tablets and below, the columns will automatically stack.</p>
<divclass="row">
<divclass="col-md-4">.col-md-4</div>
<divclass="col-md-4">.col-md-4</div>
<divclass="col-md-4">.col-md-4</div>
</div>
<h3>Three unequal columns</h3>
<p>Get three columns <strong>starting at desktops and scaling to large desktops</strong> of various widths. Remember, grid columns should add up to twelve for a single horizontal block. More than that, and columns start stacking no matter the viewport.</p>
<divclass="row">
<divclass="col-md-3">.col-md-3</div>
<divclass="col-md-6">.col-md-6</div>
<divclass="col-md-3">.col-md-3</div>
</div>
<h3>Two columns</h3>
<p>Get two columns <strong>starting at desktops and scaling to large desktops</strong>.</p>
<divclass="row">
<divclass="col-md-8">.col-md-8</div>
<divclass="col-md-4">.col-md-4</div>
</div>
<h3>Full width, single column</h3>
<pclass="text-warning">No grid classes are necessary for full-width elements.</p>
<hr>
<h3>Two columns with two nested columns</h3>
<p>Per the documentation, nesting is easy—just put a row of columns within an existing column. This gives you two columns <strong>starting at desktops and scaling to large desktops</strong>, with another two (equal widths) within the larger column.</p>
<p>At mobile device sizes, tablets and down, these columns and their nested columns will stack.</p>
<divclass="row">
<divclass="col-md-8">
.col-md-8
<divclass="row">
<divclass="col-md-6">.col-md-6</div>
<divclass="col-md-6">.col-md-6</div>
</div>
</div>
<divclass="col-md-4">.col-md-4</div>
</div>
<hr>
<h3>Mixed: mobile and desktop</h3>
<p>The Bootstrap v4 grid system has five tiers of classes: xs (extra small), sm (small), md (medium), lg (large), and xl (extra large). You can use nearly any combination of these classes to create more dynamic and flexible layouts.</p>
<p>Each tier of classes scales up, meaning if you plan on setting the same widths for xs and sm, you only need to specify xs.</p>
