Js方法记录

数组的深拷贝

let new_arr = JSON.parse(JSON.stringify(arr))

多维数组改为一维

let arr = res.data.result
  for (let i = 0; i < arr.length; i++) {
    if (arr[i].children) {
      arr = arr.slice(0, i + 1).concat(arr[i].children, arr.slice(i + 1))
      delete arr[i].children
    }
  }
  console.log(arr);