Get directory of a file name in Javascript

Question

How to get the directory of a file?

For example, I pass in a string

C:\\Program Files\\nant\\bin\\nant.exe

I want a function that r

Answer 1

filepath.split("/").slice(0,-1).join("/"); // get dir of filepath

1. split string into array delimited by "/"
2. drop the last element of the array (which would be the file name + extension)
3. join the array w/ "/" to generate the directory path

such that

"/path/to/test.js".split("/").slice(0,-1).join("/") == "/path/to"

Answer 2

I don't know if there is any built in functionality for this, but it's pretty straight forward to get the path.

path = path.substring(0,path.lastIndexOf("\\")+1);

Answer 3

Use:

var dirname = filename.match(/(.*)[\/\\]/)[1]||'';

*The answers that are based on lastIndexOf('/') or lastIndexOf('\') are error prone, because path can be "c:\aa/bb\cc/dd".
(Matthew Flaschen did took this into account, so my answer is a regex alternative)