
    <div class="container">
      <div class="anchor">
        <nz-float-button-group
          class="up"
          nzIcon="up"
          nzType="primary"
          nzTrigger="click"
          (nzOnOpenChange)="openChange($event)"
          nzPlacement="top"
        >
          <nz-float-button></nz-float-button>
          <nz-float-button nzIcon="comment"></nz-float-button>
        </nz-float-button-group>
        <nz-float-button-group
          class="down"
          nzIcon="down"
          nzType="primary"
          nzTrigger="click"
          (nzOnOpenChange)="openChange($event)"
          nzPlacement="bottom"
        >
          <nz-float-button></nz-float-button>
          <nz-float-button nzIcon="comment"></nz-float-button>
        </nz-float-button-group>
        <nz-float-button-group
          class="left"
          nzIcon="left"
          nzType="primary"
          nzTrigger="click"
          (nzOnOpenChange)="openChange($event)"
          nzPlacement="left"
        >
          <nz-float-button></nz-float-button>
          <nz-float-button nzIcon="comment"></nz-float-button>
        </nz-float-button-group>
        <nz-float-button-group
          class="right"
          nzIcon="right"
          nzType="primary"
          nzTrigger="click"
          (nzOnOpenChange)="openChange($event)"
          nzPlacement="right"
        >
          <nz-float-button></nz-float-button>
          <nz-float-button nzIcon="comment"></nz-float-button>
        </nz-float-button-group>
      </div>
    </div>
  