深层对象转深层数组（重点：先把对象转数组，直接for in 遍历对象不太可行）

var json: {
            PRow0: {
                style: {
                    width: 10
                }
            },
            PTable1: {
                style: {
                    height: 20
                }
            }
        }

const jsonToArrTree = (json) => {
    let data = Object.keys(json).map( (item) =>  {
        let ops = {
            title:item,
            key:nanoid(),
            children:[]
        }
        let child = json[item]
        if(typeof child == "object"  && Object.keys(child).length > 0){
            ops.children = jsonToArrTree(child)
        }
        return ops
    })
    return data
}

转换结果
[
    {
        "title": "PRow0",
        "key": "LzgVGHyEkwyUAUVOSOt_u",
        "children": [
            {
                "title": "style",
                "key": "0KNgtu0C4Cg_8QalqAcTm",
                "children": [
                    {
                        "title": "width",
                        "key": "jN4HAiWnfFXNz4csrtEQz",
                        "children": []
                    }
                ]
            }
        ]
    },
    {
        "title": "PTable1",
        "key": "Y4i4tq8C12rXbH_GBtAXl",
        "children": [
            {
                "title": "style",
                "key": "2bD_q7ZfEu3yZILLsUfSn",
                "children": [
                    {
                        "title": "height",
                        "key": "OOg79AeMP-BQoDmF7wzlX",
                        "children": []
                    }
                ]
            }
        ]
    }
]

　　

每个字段都是上一级父级字段的拼接

let pre = ''
const jsonToArrTree = (json) => {
    let data = Object.keys(json).map( (item) =>  {
        pre += (pre ? '.':'') + item
        let ops = {
            title:pre,
            key:nanoid(),
            children:[]
        }
        let child = json[item]
        console.log(pre)
        if(typeof child == "object"  && Object.keys(child).length > 0){
            ops.children = jsonToArrTree(child)
        }
        return ops
    })
    pre = ''
    return data
}