--- title: Hoptoad and Javascript, Sitting in a Tree, S-E-N-D-I-N-G teaser: You can send errors from JS to Hoptoad now, wow. tags: news,web,javascript,airbrake author: Josh Clayton published_on: 2010-08-03 --- With an [open API](http://hoptoadapp.com/pages/api), [Hoptoad, the app error app](http://hoptoadapp.com), can track errors from any sort of app you want: Rails, Sinatra, Rack, PHP, C#... the list goes on. We didn't want to leave front-end developers in the dark when their Javascript throws errors, so we've added a Hoptoad notifier for Javascript! I'm sure you're asking, "How do I participate in this awesomeness?". It's easy. If you're using the [hoptoad_notifier gem](http://rubygems.org/gems/hoptoad_notifier), upgrade to the latest version (2.3.7 at the time of this update) and update your `config/initializers/hoptoad.rb`: HoptoadNotifier.configure do |config| config.api_key = 'YOUR-PROJECT-API-KEY' config.js_notifier = true # ADD ONE LINE FOR JAVASCRIPT ERROR TRACKING! end Yes, that's it. The gem injects Javascript right after your `` tag. Done! ### Not using hoptoad_notifier gem If you're _not_ using the hoptoad_notifier gem, you'll just need to include a couple of lines (at the top of your ``): ### The details You may be proclaiming, "Oh no, Javascript at the top of ``! What are you thinking?" I'll let you in on a little secret: we want our Javascript loaded before any other Javascript. That way, if one of those libraries throws an exception, we're there to let you know! The nitty-gritty details: we're currently only supporting [browsers that support the `onerror` event (Firefox 2+, IE6+)](http://www.quirksmode.org/dom/events/error.html). You'll also be including your project API key on the page. **This is different from your user API key, so there's no need to worry about someone deleting your projects or users.** We'll continue to expand this feature and let you know as we progress. If you have any suggestions or spot a bug, [let us know](http://help.hoptoadapp.com)! So, what're you waiting for? It takes 30 seconds to sign up; [go grab an account and start tracking your Javascript errors now](https://hoptoadapp.com/account/new)! FYI: _Hoptoad/Airbrake was sold to RackSpace and is now called [Airbrake Bug Tracker](http://airbrake.io)_.