bfs.js

export const walkAndDealItems = (datas, func, key = 'children') => {
  if (!func || typeof func !== 'function') return datas
  const nodes = [...datas]
  let node = nodes.shift()
  while (node) {
    func(node)
    if (node[key]) {
      for (const cNode of node[key]) {
        nodes.push(cNode)
      }
    }
    node = nodes.shift()
  }
  return datas
}