Package Exports
- is-online
- is-online/browser
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (is-online) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
is-online 
Check if the internet connection is up
Works in Node.js, CLI and the browser (with browserify).
In the browser you have navigator.onLine
, but it's useless as it only tells you if there's a local connection, and not whether the internet is accessible.
Install
$ npm install --save is-online
Usage
var isOnline = require('is-online');
isOnline(err, online) {
console.log(online);
//=> true
});
API
isOnline([domains], callback)
domains
Optional
Type: array
Default: ['google.com', 'opendns.com', 'baidu.com']
(recommend not to change this)
The domains will be checked concurrently and is multiple for redunancy.
When used in the browser, make sure the domains you choose has a favicon.ico
in the root.
callback(error, online)
Required
Type: function
error
is there only by Node.js convention and is always null
.
CLI

$ npm install --global is-online
$ is-online --help
Example
is-online
✔︎ Online
License
MIT © Sindre Sorhus