Offline.js – Alert Users When No Internet Connectivity
Offline.js is a library to automatically alert your users when they’ve lost internet connectivity, like Gmail. It captures AJAX requests which were made while the connection was down, and remakes them when it’s back up, so your app reacts perfectly. It has a number of beautiful themes and requires no configuration. It has been tested on Modern browsers like Chrome, Firefox, Safari and IE8+.
License: License Free