1. 

 

2. 

3. 将树状结构转为list

export function treeToList(data) {  let tmp = []  data.forEach((one) => {    tmp.push(Object.assign({}, one))    if (one.children && one.children.length > 0) {      const children = treeToList(one.children)      if (children) {        tmp = tmp.concat(children)      }    }  })  return tmp}