<el-tree
class="filter-tree"
:data="data"
:props="defaultProps"
:highlight-current="true"
node-key="value"
:default-expanded-keys="[2]"
:current-node-key="currentId"
@node-click="nodeClick"
ref="tree">
<span class="custom-tree-node" slot-scope="{node}">
<span>
{{ node.label }}<i :class="node.icon"></i>
</span>
</span>
</el-tree>