vue中keep-alive多级路由缓存问题

const modules = []
files.keys().forEach(key => {
    const filesObj = files(key).default || files(key)
    Object.keys(filesObj).forEach(keyOne => {
        modules.push(filesObj[keyOne])
    })
})

export const menuList = modules;  // 用于菜单展示
​
const routerList = formatTwoStageRoutes(formatFlatteningRoutes(modules)); // 将路由扁平化为二级路由
​
const router = new VueRouter({
    scrollBehavior: () => ({ y: 0 }),
    mode: 'history',
    base: process.env.BASE_URL,
    routes: routerList, // 在路由配置项中使用扁平化处理后的路由
})

export const formatFlatteningRoutes =(routesList => {
  if (routesList.length <= 0) return routesList;
  let list = [];
  routesList.forEach(v => {
    if(v.path === '/') {
      // 用于添加初试layout和首页，其他各中心配置过滤掉layout及父节点，只保留children内路由
      list.push(v);
      list = list.concat(formatFlatteningRoutes(v.children))
    } else if (v.children && v.children.length > 0) {
      list = list.concat(formatFlatteningRoutes(v.children))
    } else {
      list.push(v);
    }
  })
  return list;
})
​
export const formatTwoStageRoutes = list => {
  if (list.length <= 0) return list;
  const routerList = [];
  list.forEach(v => {
    if (v.path === '/') {
      routerList.push({
        component: v.component,
        name: v.name,
        path: v.path,
        redirect: v.redirect,
        meta: v.meta,
        children: []
      })
    } else if (v.path === '/login' || v.path === '/showcasePage') {
      // 不需要配置layout的页面
      routerList.push(v)
    } else {
      routerList[0].children.push({ ...v })
    }
  })
  return routerList;
}