[element] el-tree 父级元素加粗

<el-tree
        ref="tree"
        :show-checkbox="showCheckBox"
        :data="data"
        :props="props"
        :node-key="nodeKey"
      >
        <div
          class="custom-tree-node ellipsis"
          slot-scope="{ node,data }"
          :style="width: 100px"
        >
          <div
            class="ellipsis span-label"
            :class="{
            'custom-origan-tree-node':(data['children'] && data['children'].length)
          }"
            :title="node.label"
            @click="onClickNode(node.data)"
          >
            {{ node.label }}
          </div>
        </div>
      </el-tree>

.custom-origan-tree-node{
        font-weight: bold;
      }