element-ui树形图，名字过长滚动条问题

<el-tree
  ref="tree"
  v-loading="treeLoading"
  default-expand-all
  :expand-on-click-node="false"
  :data="treeData"
  :filter-node-method="filterNode"
  :props="defaultProps"
  style="margin-top: 8px;"
  @node-click="handleNodeClick"
/>

/deep/ .el-tree {
 overflow-x: auto;
}
/deep/ .el-tree-node>.el-tree-node__children {
  overflow: inherit;
}

或者

.el-tree-node>.el-tree-node_children {
    overflow: visible;
}