:data //树的数据
default-expand-all
<el-tree class="iip-addressbook__departtree" :data="dataList" default-expand-all node-key="id" ref="addressDepartTree" highlight-current :expand-on-click-node="false" :props="defaultProps" @node-click="handleNodeClick" @node-contextmenu="contextMeunClick"> </el-tree>