path.basename(p, [ext])

var path= require("path");
path.basename('/foo/bar/baz/asdf/quux.html')
// returns
'quux.html'
 
path.basename('/foo/bar/baz/asdf/quux.html', '.html')
// returns
'quux'
 
var a = path.basename('/foo/bar/baz/asdf/', '.html');
// returns
'asdf'