treeSelect树型下拉，后台返回数据处理_treeselect触发值返回方法-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42018331/article/details/121156548

本文介绍如何使用JavaScript处理后台返回的数据，构建并渲染树型下拉选择器。内容涉及数据转换、递归遍历及DOM操作，帮助开发者实现高效的数据展示。

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在这里插入代码片

```javascript
const data=[{
					class_level: "1",
					one_class_cd: "A",
					one_class_name: "预警",
					children: [{
						class_level: "2",
						one_class_cd: "A",
						one_class_name: "预警",
						two_class_cd: "01",
						two_class_name: "资金变动",
						children: [{
								class_level: "3",
								one_class_cd: "A",
								one_class_name: "预警",
								two_class_cd: "01",
								two_class_name: "资金变动",
								three_class_cd: "03",
								three_class_name: "大额现金型理财产品赎回",
							},
							{
								class_level: "3",
								one_class_cd: "A",
								one_class_name: "预警",
								two_class_cd: "01",
								two_class_name: "资金变动",
								three_class_cd: "01",
								three_class_name: "大额实时资金转入",
							},
							{
								class_level: "3",
								one_class_cd: "A",
								one_class_name: "预警",
								two_class_cd: "01",
								two_class_name: "资金变动",
								three_class_cd: "02",
								three_class_name: "大额实时资金转出",
							},
						]
					}]
				},
				{
					class_level: "1",
					one_class_cd: "B",
					one_class_name: "代办",
					children: [{
						class_level: "2",
						one_class_cd: "B",
						one_class_name: "代办",
						two_class_cd: "01",
						two_class_name: "获客",
						children: [{
								class_level: "3",
								one_class_cd: "B",
								one_class_name: "代办",
								two_class_cd: "01",
								two_class_name: "获客",
								three_class_cd: "01",
								three_class_name: "新开户预约提醒",
							},
							{
								class_level: "3",
								one_class_cd: "B",
								one_class_name: "代办",
								two_class_cd: "01",
								two_class_name: "获客",
								three_class_cd: "03",
								three_class_name: "保险商机",
							}
						]
					}]
				}
			]
this.setItem(data);
setItem(arr){
	arr.forEach(element=>{
		element.title=element.three_class_namme||element.two_class_namme||element.one_class_namme;
		element.key=element.value=element.three_class_cd?(element.one_class_cd+"&"+element.two_class_cd+"&"+element.three_class_cd):(element.two_class_cd?element.one_class_cd+"&"+element.two_class_cd:element.one_class_cd);
		element.children=element.children;
		if(element.children&&element.children.length){
			this.setItem(element.children)
		}
	})