<div class="demo-preview-block"> <p> Default: <div id="first" class="mdl-spinner mdl-js-spinner is-active"></div> </p> <p> Single color (uses primary palette): <div class="mdl-spinner mdl-spinner--single-color mdl-js-spinner is-active"></div> </p> <h5>Data binding</h5> <button class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect" id="button">On/Off</button> <p>Turn first spinner on/off</p> </div>