JsExceptionNotifier¶ ↑

The JsExceptionNotifier gem detects JS exceptions with TraceKit and sends notifications via email using Exception Notification gem. The TraceKit is attached by default.

Requirements¶ ↑

Ruby 2.0.0 or greater
Rails 4.0 or greater
Exception Notification gem
TraceKit(included in package)

Getting Started¶ ↑

Add the following line to your application’s Gemfile:

gem "js_exception_notifier", :git => "git://github.com/shorelabs/js-exception-notifier.git"

That’s it, the configuration ends up here.

Usage¶ ↑

Add the following line at the beginning of the javascript file

javascript_include_tag "js_exception_notifier.js"

Or just include files within the asset pipeline:

//= require js_exception_notifier

Usage when serving JS from CDN¶ ↑

Due to a potential security issue, browsers traditionally don’t provide access to error data if the script violates the same-origin policy. Instead, browsers just report a meaningless Script error on line 0, with no additional data.

If you are serving your javascript assets through a CDN (Cloudfront for eg), you need to

have HTTP CORS headers (not covered here)
load your JS with a crossorigin tag to enable error reporting

The latter is done with

javascript_include_tag "js_exception_notifier.js", crossorigin: 'anonymous'

Or if js_exception_notifier is added to the asset pipeline

javascript_include_tag "application", crossorigin: 'anonymous'