Note
Segment has paused maintenance on this project, but may return it to an active status in the future. Issues and pull requests from external contributors are not being considered, although internal contributions may appear from time to time. The project remains available under its open source license for anyone to use.
Constructs possible levels from a url and attempts to set a cookie "." + domain for each, when it succeeds it returns the top level domain.
This only works on the domain itself, since it attempts to set a cookie.
$ npm install @segment/top-domainvar domain = require('top-domain');
assert('google.com' == domain('http://www.google.com'));
assert('google.co.uk' == domain('http://www.google.co.uk'));
assert('google.co.uk' == domain('http://google.co.uk'));
assert('github.com' == domain('http://gist.github.com/calvinfo/some_file'));
assert('' == domain('http://localhost:3000'));
assert('google.com' == domain('https://google.com:443/stuff'));
assert('' == domain('http://dev:3000'));
assert('' == domain('0.0.0.0'));
assert('' == domain('127.0.0.1'));