<h1class="page-header">Migrating from 2.x to 3.0</h1>
<pclass="lead">Bootstrap 3 is not backwards compatible with v2.x. Use this section as a general guide to upgrading from v2.x to v3.0. For a broader overview, see <ahref="http://blog.getbootstrap.com/2013/08/19/bootstrap-3-released/">what's new</a> in the v3.0 release announcement.</p>
<h2id="classes">Major class changes</h2>
<p>This table shows the style changes between v2.x and v3.0.</p>
<divclass="table-responsive">
<tableclass="table table-bordered table-striped">
<thead>
<tr>
<th>Bootstrap 2.x</th>
<th>Bootstrap 3.0</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>.row-fluid</code></td>
<td><code>.row</code></td>
</tr>
<tr>
<td><code>.span*</code></td>
<td><code>.col-md-*</code></td>
</tr>
<tr>
<td><code>.offset*</code></td>
<td><code>.col-md-offset-*</code></td>
</tr>
<tr>
<td><code>.brand</code></td>
<td><code>.navbar-brand</code></td>
</tr>
<tr>
<td><code>.nav-collapse</code></td>
<td><code>.navbar-collapse</code></td>
</tr>
<tr>
<td><code>.nav-toggle</code></td>
<td><code>.navbar-toggle</code></td>
</tr>
<tr>
<td><code>.btn-navbar</code></td>
<td><code>.navbar-btn</code></td>
</tr>
<tr>
<td><code>.hero-unit</code></td>
<td><code>.jumbotron</code></td>
</tr>
<tr>
<td><code>.icon-*</code></td>
<td><code>.glyphicon .glyphicon-*</code></td>
</tr>
<tr>
<td><code>.btn</code></td>
<td><code>.btn .btn-default</code></td>
</tr>
<tr>
<td><code>.btn-mini</code></td>
<td><code>.btn-xs</code></td>
</tr>
<tr>
<td><code>.btn-small</code></td>
<td><code>.btn-sm</code></td>
</tr>
<tr>
<td><code>.btn-large</code></td>
<td><code>.btn-lg</code></td>
</tr>
<tr>
<td><code>.alert-error</code></td>
<td><code>.alert-danger</code></td>
</tr>
<tr>
<td><code>.visible-phone</code></td>
<td><code>.visible-xs</code></td>
</tr>
<tr>
<td><code>.visible-tablet</code></td>
<td><code>.visible-sm</code></td>
</tr>
<tr>
<td><code>.visible-desktop</code></td>
<td>Split into <code>.visible-md .visible-lg</code></td>
</tr>
<tr>
<td><code>.hidden-phone</code></td>
<td><code>.hidden-xs</code></td>
</tr>
<tr>
<td><code>.hidden-tablet</code></td>
<td><code>.hidden-sm</code></td>
</tr>
<tr>
<td><code>.hidden-desktop</code></td>
<td>Split into <code>.hidden-md .hidden-lg</code></td>
<td>No direct equivalent, but <ahref="../components/#list-group">list groups</a> and <ahref="../javascript/#collapse"><code>.panel-group</code>s</a> are similar.</td>
<p>Other changes in v3.0 are not immediately apparent. Base classes, key styles, and behaviors have been adjusted for flexibility and our <em>mobile first</em> approach. Here's a partial list:</p>
<ul>
<li>By default, text-based form controls now receive only minimal styling. For focus colors and rounded corners, apply the <code>.form-control</code> class on the element to style.</li>
<li>Text-based form controls with the <code>.form-control</code> class applied are now 100% wide by default. Wrap inputs inside <code><div class="col-*"></div></code> to control input widths.</li>
<li><code>.badge</code> no longer has contextual (-success,-primary,etc..) classes.</li>
<li><code>.btn</code> must also use <code>.btn-default</code> to get the "default" button.</li>
<li><code>.row</code> is now fluid.</li>
<li>Images are no longer responsive by default. Use <code>.img-responsive</code> for fluid <code><img></code> size.</li>
<li>The icons, now <code>.glyphicon</code>, are now font based. Icons also require a base and icon class (e.g. <code>.glyphicon .glyphicon-asterisk</code>).</li>
<li>Typeahead has been dropped, in favor of using <ahref="http://twitter.github.io/typeahead.js/">Twitter Typeahead</a>.</li>
<li>Modal markup has changed significantly. The <code>.modal-header</code>, <code>.modal-body</code>, and <code>.modal-footer</code> sections are now wrapped in <code>.modal-content</code> and <code>.modal-dialog</code> for better mobile styling and behavior. Also, you should no longer apply <code>.hide</code> to <code>.modal</code> in your markup.</li>
<li>As of v3.1.0, the HTML loaded by the <code>remote</code> modal option is now injected into the <code>.modal-content</code> (from v3.0.0 to v3.0.3, into the <code>.modal</code>) instead of into the <code>.modal-body</code>. This allows you to also easily vary the header and footer of the modal, not just the modal body.</li>
<li>JavaScript events are namespaced. For example, to handle the modal "show" event, use <code>'show.bs.modal'</code>. For tabs "shown" use <code>'shown.bs.tab'</code>, etc.</li>
</ul>
<p>For more information on upgrading to v3.0, and code snippets from the community, see <ahref="http://bootply.com/">Bootply</a>.</p>
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<p>Code licensed under <ahref="https://github.com/twbs/bootstrap/blob/master/LICENSE"target="_blank">MIT</a>, documentation under <ahref="http://creativecommons.org/licenses/by/3.0/">CC BY 3.0</a>.</p>
