[JavaScript]Get the name of the parent folder from the full path

Things I want to do

This JavaScript code retrieves the name of the parent folder from its full path.

Both URLs and file paths are valid.

I found a tool that returns the path from root to parent folder, but I couldn’t find one that returns only the parent folder, so I’m sharing it.

example

C:¥¥a\b\c\file.txt -> c

http://a.com/b/file.txt -> b

implementation

The implementation will be as follows:

This program splits the input by ‘/’ and ‘¥’ and returns the second-to-last string.

function getParentFolderName(filePath) {
  const parts = filePath.split(/[\\/]/);
  if (parts.length > 1) {
    return parts[parts.length - 2];
  } else {
    return "";
  }
}

How to use

Call it as follows:

getParentFolderName(FULLPATH)

Specific example

call

getParentFolderName("C:¥¥a\\b\\c\\file.txt")

Return value

'c'

Result

I was able to get the name of the parent folder from the full path using JavaScript.