How to install an npm package from GitHub directly?

Question

Trying to install modules from github results in:

ENOENT error on package.json.

Easily reproduced using express:

Answer 1

Because https://github.com/visionmedia/express is the URL of a web page and not an npm module. Use this flavor:

git+https://github.com/visionmedia/express.git

or this flavor if you need SSH:

git+ssh://git@github.com/visionmedia/express.git