app/node_modules/ng-zorro-antd/popconfirm/style/index.less

@import '../../style/themes/index';
@import '../../style/mixins/index';

@popconfirm-prefix-cls: ~'@{ant-prefix}-popconfirm';

.@{popconfirm-prefix-cls} {
  z-index: @zindex-popoconfirm;
}