Subtract one absolute path from another in Node.js

Question

I have two paths in Node.js, e.g.:

var pathOne = '/var/www/example.com/scripts';
var pathTwo = '/var/www/example.com/scripts/foo/foo.js';

How do I subtract one path from another in order to obtain a relative path?

subtractPath(pathTwo, pathOne); // => 'foo/foo.js'

Is there a module that does this according to all necessary URL rules or do I better use some simple string manipulations?

Answer 1

Not sure what you mean by "according to all necessary URL rules", but it seems you should be able to just use path.relative;

> var pathOne = '/var/www/example.com/scripts';
> var pathTwo = '/var/www/example.com/scripts/foo/foo.js';

> path.relative(pathOne, pathTwo)
'foo/foo.js'

> path.relative(pathTwo, pathOne)
'../..'