el-tree滚动条不显示

<el-tree
	:style="{height: (tableHeight+50)+ 'px',overflow:'scroll'}"
/>
           

data() {
	return {
		tableHeight: document.body.clientHeight - 210, // 表格高度
	}
}
           

<style scoped>
.el-tree>.el-tree-node {
  min-width: 100%;
  display: inline-block;
}
</style>