Html

  	 <el-cardshadow="hover"class="solo flex-2"style="height: calc(100vh - 1.6rem); border: 1px solid #ebeef5"><div slot="header" class="clearfix"><span>问题分类</span></div><div class="scroll-tree"><el-scrollbar style="height: 100%"><el-tree:data="data":props="defaultProps"@node-click="handleNodeClick"node-key="id"></el-tree></el-scrollbar></div></el-card>

样式

/* 添加水平滚动条和纵向滚动条 */
.scroll-tree {overflow: auto;height: calc(100vh - 1.6rem - 60px);
}
.scroll-tree ::-webkit-scrollbar {width: 10px;height: 10px;
}
.el-tree {display: inline-block;min-width: 100%;
}
/deep/.solo .el-card__body {padding: 0px;
}

点击节点高亮

• tree 标签添加属性 highlight-current

/deep/.el-tree--highlight-current.el-tree-node.is-current> .el-tree-node__content {background-color: #318eff;color: #fff;
}