dir.read()

• 返回：<Promise> 满足 <fs.Dirent> | <null>

  ¥Returns: <Promise> Fulfills with a <fs.Dirent> | <null>

通过 readdir(3) 异步读取下一个目录条目作为 <fs.Dirent>。

¥Asynchronously read the next directory entry via readdir(3) as an <fs.Dirent>.

返回一个 promise，如果没有更多的目录条目可供读取，则将通过 <fs.Dirent> 或 null 来实现。

¥A promise is returned that will be fulfilled with an <fs.Dirent>, or null if there are no more directory entries to read.

此函数返回的目录条目没有操作系统底层目录机制提供的特定顺序。迭代目录时添加或删除的条目可能不包括在迭代结果中。

¥Directory entries returned by this function are in no particular order as provided by the operating system's underlying directory mechanisms. Entries added or removed while iterating over the directory might not be included in the iteration results.