fsPromises.truncate(path[, len])

• path <string> | <Buffer> | <URL>
• len <integer> 默认值: 0
• 返回: <Promise> 成功时将使用 undefined 履行。

将 path 上的内容截断（缩短或延长长度）到 len 个字节。

• path <string> | <Buffer> | <URL>
• len <integer> Default: 0
• Returns: <Promise> Fulfills with undefined upon success.

Truncates (shortens or extends the length) of the content at path to len bytes.