js 数组转JSON树[通俗易懂]

	var nodes = [
    {"id":2,"title":"第一级1","parentid":0},
    {"id":3,"title":"第二级1","parentid":2},
    {"id":4,"title":"第二级2","parentid":2},
    {"id":5,"title":"第三级1","parentid":4},
    {"id":6,"title":"第三级2","parentid":3}
    ];

	
    function convertToTreeData(data, pid) {
      const result = []
      let temp = []
      for (let i = 0; i < data.length; i++) {
        if (data[i].parentid=== pid) {
          const obj =JSON.parse(JSON.stringify(data[i]))
          temp = this.convertToTreeData(data, data[i].id)
          if (temp.length > 0) {
            obj.children = temp
          }
          result.push(obj)
        }
      }
      return result
    }

//使用
var tree=convertToTreeData(nodes,0)

转载自

作者：axe
来源：CSDN
原文：https://blog.csdn.net/thc1987/article/details/86596893
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