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Given two absolute paths, e.g.
/var/data/stuff/xyz.html
/var/data
How to create a relative path that uses the second path as its base? In the example above, the result would be: stuff/xyz.html
Another example:
/relative/sub/foo/sub/file
/relative/path
../../../path
This is similar to this question but I’m looking for the optimal JavaScript solution instead of Java.
If you’re running this on the server with node.js:
http://nodejs.org/api/path.html#path_path_relative_from_to
This is their implementation:
https://github.com/joyent/node/blob/master/lib/path.js#L233
This should work in the browser without really any changes. It’s been battle-tested, so it already handles edge cases. It’s not a one-liner, but it works flawlessly, which I think is more important. The POSIX version isn’t bad, if that’s the only think you need to support.