ets button state to loading - disables button and swaps text to loading text. Loading text should be defined on the button element using the data attribute <code>data-loading-text</code>.
          </p>
          <pre class="prettyprint linenums">&lt;button class="btn" data-loading-text="loading stuff..." &gt;...&lt;/button&gt;</pre>
          <div class="alert alert-info">
            <strong>Heads up!</strong>
            <a href="https://github.com/twitter/bootstrap/issues/793">Firefox persists the disab