portainer/app/docker/components/log-viewer/logViewer.html

<div class="row">
  <div class="col-sm-12">
    <rd-widget>
      <rd-widget-header icon="fa-file-alt" title="Log viewer settings"></rd-widget-header>
      <rd-widget-body>
        <form class="form-horizontal">
          <div class="form-group">
            <div class="col-sm-12">
              <label for="tls" class="control-label text-left">
                Auto-refresh logs
                <portainer-tooltip position="bottom" message="Disabling this option allows you to pause the log collection process and the auto-scrolling."></portainer-tooltip>
              </label>
              <label class="switch" style="margin-left: 20px;">
                <input type="checkbox" ng-model="$ctrl.state.logCollection" ng-change="$ctrl.state.autoScroll = $ctrl.state.logCollection; $ctrl.logCollectionChange($ctrl.state.logCollection)"><i></i>
              </label>
            </div>
          </div>
          <div class="form-group">
            <div class="col-sm-12">
              <label for="tls" class="control-label text-left">
                Display timestamps
              </label>
              <label class="switch" style="margin-left: 20px;">
               <input type="checkbox" ng-model="$ctrl.displayTimestamps"><i></i>
               </label>
            </div>
          </div>
          <div class="form-group">
            <label for="logs_search" class="col-sm-1 control-label text-left">
              Search
            </label>
            <div class="col-sm-11">
              <input class="form-control" type="text" name="logs_search" ng-model="$ctrl.state.search" ng-change="$ctrl.state.selectedLines.length = 0;" placeholder="Filter...">
            </div>
          </div>
          <div class="form-group" ng-if="$ctrl.state.copySupported">
            <label class="col-sm-1 control-label text-left">
              Actions
            </label>
            <div class="col-sm-11">
              <button class="btn btn-primary btn-sm" ng-click="$ctrl.copy()" ng-disabled="($ctrl.state.filteredLogs.length === 1 && !$ctrl.state.filteredLogs[0]) || !$ctrl.state.filteredLogs.length"><i class="fa fa-copy space-right" aria-hidden="true"></i>Copy</button>
              <button class="btn btn-primary btn-sm" ng-click="$ctrl.copySelection()" ng-disabled="($ctrl.state.filteredLogs.length === 1 && !$ctrl.state.filteredLogs[0]) || !$ctrl.state.filteredLogs.length || !$ctrl.state.selectedLines.length"><i class="fa fa-copy space-right" aria-hidden="true"></i>Copy selected lines</button>
              <button class="btn btn-primary btn-sm" ng-click="$ctrl.clearSelection()" ng-disabled="$ctrl.state.selectedLines.length === 0"><i class="fa fa-times space-right" aria-hidden="true"></i>Unselect</button>
              <span>
                <i id="refreshRateChange" class="fa fa-check green-icon" aria-hidden="true" style="margin-left: 7px; display: none;"></i>
              </span>
            </div>
          </div>
        </form>
      </rd-widget-body>
    </rd-widget>
  </div>
</div>

<div class="row" style="height:54%;">
  <div class="col-sm-12" style="height:100%;">
    <pre class="log_viewer" scroll-glue="$ctrl.state.autoScroll" force-glue>
      <div ng-repeat="line in $ctrl.state.filteredLogs = ($ctrl.data | filter:$ctrl.state.search) track by $index" class="line" ng-if="line"><p class="inner_line" ng-click="$ctrl.selectLine(line)" ng-class="{ 'line_selected': $ctrl.state.selectedLines.indexOf(line) > -1 }">{{ line }}</p></div>
      <div ng-if="!$ctrl.state.filteredLogs.length" class="line"><p class="inner_line">No log line matching the '{{ $ctrl.state.search }}' filter</p></div>
      <div ng-if="$ctrl.state.filteredLogs.length === 1 && !$ctrl.state.filteredLogs[0]" class="line"><p class="inner_line">No logs available</p></div>
    </pre>
  </div>
</div>