在node.js中删除部分文件

Currently, I'm looking at trying to remove part of what is basically a proprietary archive format; in order to support the ability to remove a file, I'm trying to figure out how to remove a segment of the file (given an offset and a length). I see there's plenty of append logic when it comes to the fs module of node, but nothing that seems to "splice" parts of a file.Currently, I'm looking at trying to remove part