diff --git a/README.rst b/README.rst
index d2063f8..b3d29d5 100644
--- a/README.rst
+++ b/README.rst
@@ -159,6 +159,13 @@ Check `RubyGems `_ for updates.
gems
The name used on RubyGems, e.g. ``sass``.
+Check NPM Registry
+----------
+Check `NPM Registry `_ for updates.
+
+npm
+ The name used on NPM Registry, e.g. ``coffee-script``.
+
Check Local Pacman Database
---------------------------
This is used when you run ``nvchecker`` on an Arch Linux system and the program always keeps up with a package in your configured repositories for `Pacman`_.
diff --git a/nvchecker/get_version.py b/nvchecker/get_version.py
index 472d93f..ec7ea4b 100644
--- a/nvchecker/get_version.py
+++ b/nvchecker/get_version.py
@@ -5,6 +5,7 @@ logger = logging.getLogger(__name__)
handler_precedence = (
'github', 'gitcafe', 'aur', 'pypi', 'archpkg', 'gems', 'pacman',
'cmd', 'bitbucket', 'gcode_hg', 'gcode_svn', 'regex', 'manual', 'vcs',
+ 'npm',
)
def get_version(name, conf, callback):
diff --git a/nvchecker/source/npm.py b/nvchecker/source/npm.py
new file mode 100644
index 0000000..4c5280f
--- /dev/null
+++ b/nvchecker/source/npm.py
@@ -0,0 +1,17 @@
+import json
+from functools import partial
+
+from tornado.httpclient import AsyncHTTPClient
+
+NPM_URL = 'https://registry.npmjs.org/%s'
+
+def get_version(name, conf, callback):
+ repo = conf.get('npm') or name
+ url = NPM_URL % repo
+ AsyncHTTPClient().fetch(url, user_agent='lilydjwg/nvchecker',
+ callback=partial(_npm_done, name, callback))
+
+def _npm_done(name, callback, res):
+ data = json.loads(res.body.decode('utf-8'))
+ version = data['dist-tags']['latest']
+ callback(name, version)