javascript遍历多层级数据

代码

// data:需要处理的数据 level:用于标记数据所在层级(从1开始)
const dataLoop=(data, level = 1)=>{
    return data.map(item=>{
        let r = {...item, level}
        console.log('item', item)
        // 判断如果有下级，就传入children继续向下循环
        if(r.children && r.children.length){
            r.children = dataLoop(r.children, level+1)
        }
        return r
    })
}
let tree = [
    { id: '1', name: '1', children: [
        { id: '1-1', name: '1-1'},
        { id: '1-2', name: '1-2'},
        { id: '1-3', name: '1-3', children: [
            { id: '1-3-1', name: '1-3-1'},
            { id: '1-3-2', name: '1-3-2'},
            { id: '1-3-3', name: '1-3-3', children: [
                { id: '1-3-3-1', name: '1-3-3-1'},
                { id: '1-3-3-2', name: '1-3-3-2'},
                { id: '1-3-3-3', name: '1-3-3-3'},
            ]},
        ]},
    ]},
    { id: '2', name: '1'}
]
const result = dataLoop(tree)
console.log('result', result)

截图

1. 所有层级的数据都打印了出来
   

2. 处理后的数据