<aside> 💡 图标右上角的圆形徽标数字。
</aside>
<Popover
overlayStyle={{ width: 336 }}
align={{ offset: [14, 0] }}
placement="bottomRight"
overlayClassName={styles.downloadPopover}
content={<ExportList popoverShow={exportPopoverShow} downloadCallback={this.queryDownLoadNum} />}
trigger="click"
visible={exportPopoverShow}
onVisibleChange={this.changeExportPopoverShow}
getPopupContainer={triggerNode => triggerNode.parentNode}
>
<Badge count={downloadNum} offset={[2, -5]}>
<Icon type="cloud-download" style={{ cursor: 'pointer' }} />
</Badge>
</Popover>