  <div class="card card-primary card-outline">
              <div class="card-header">
                <h3 class="card-title">
                  <i class="far fa-chart-bar"></i>
                  Interactive Area Chart
                </h3>

                <div class="card-tools">
                  Real time
                  <div class="btn-group" id="realtime" data-toggle="btn-toggle">
                    <button type="button" class="btn btn-default btn-sm active" data-toggle="on">On</button>
           