写在前面的话

昨儿忘拿电脑回家了，早晨来补~

（一）题目

将下面的数组铺平

const data=[

        {

          id:1,

          title:"课程1",

          children:[

            {id:4,title:"课程1-1"},

            {

              id:5,

              title:"课程1-1",

              children:[

                {id:6,title:"课程1-2-1"},

                {id:7,title:"课程1-2-2"},

              ]

            },

          ]

        },

        {id:2,title:"课程2"},

        {id:3,title:"课程3"}

      ]

期待的结果类似是

const formatData = [

{ id: 1, title: "课程1" },

{ id: 4, title: "课程1-1" },

{ id: 5, title: "课程1-2" },

{ id: 6, title: "课程1-2-1" },

{ id: 7, title: "课程1-2-2" },

{ id: 2, title: "课程2" },

{ id: 3, title: "课程3" },

];

（二）思路

1、遍历数组，找到有children节点的对象

将节点push到数组中；

2、删掉原数组中的children节点

3、递归

代码如下

for(let item of rs){

          if(item.children){

            for(let i of item.children){

              rs.push(i)  

            }

            delete item['children']

            handle(rs)

          }

        }

浏览器中打印如下

以上