See the history of the console.
Track how the user found an error.
Quickly identify the source code of an error.
Detail about the OS, Browser, and settings.
Include your own data to correlate errors.
TrackJS pointed me towards a bug in our third-party integration code that prevented sending important information to our back-end. Without TrackJS, it's likely we wouldn't have discovered this for a long time, and probably with great difficulty hunting it down.
a clean and easy-to-use instrument that promises to make life easier for front-end developers.ProgrammableWeb