a-table自定义展开图标

原文来自：vue 修改ant中table表格的展开图标 树形表格expandIcon自定义图标

        <template #expandIcon="props">
          <span v-if="props.record.children?.length > 0">
            <div
                v-if="props.expanded"
                style="display: inline-block; margin-right: 10px"
                @click="
                (e) => {
                  props.onExpand(props.record, e);
                }
              "
            >
              <DownOutlined />
            div>
            <div
                v-else
                style="display: inline-block; margin-right: 10px"
                @click="
                (e) => {
                  props.onExpand(props.record, e);
                }
              "
            >
              <RightOutlined />
            div>
         span>
          <span v-else style="margin-right:29px">span>
        template>