<span>
  <button type="button" class="btn btn-link nopadding" ng-click="$ctrl.copyValueText()" title="复制值"> <i class="fa fa-copy"></i> 复制 </button>
  <span ng-class="{ 'copy-button-fadeout': $ctrl.state.isFading }" class="copy-button-copy-text"> <i class="fa fa-check" aria-hidden="true"></i> 复制的 </span>
</span>
